VB6 代码管家-创建磁性窗体2024年12月8日 21:46
Public Class1 As New Class1
Private Sub Form_Load()
Form2.Show
Call Class1.AddWindow(Me.hWnd) '-- 载入主窗体
Call Form1.Class1.AddWindow(Form2.hWnd, Form1.hWnd) '-- 添加从属窗体
'Form2.hWnd为某窗体的句柄,这个句柄基本上可以是任何windows窗体句柄
End Sub
Private Sub Form_Unload(Cancel As Integer)
Call Form1.Class1.RemoveWindow(Form2.hWnd) '-- 关闭从属窗体
'Form2.hWnd为某窗体的句柄,这个句柄基本上可以是任何windows窗体句柄,但这个句柄必须和Form_Load事件中的Form2.hWnd句柄一致
End Sub
'##################################### 以上是窗体代码 #####################################
'#####################################以下是类模块代码#####################################
'****************************************************************************
'人人为我，我为人人
'枕善居汉化收藏整理
'发布日期：05/04/22
'描 述：仿WinAmp磁性窗口
'下 载： http://www.NewXing.com/
'网 站：http://www.mndsoft.com/blog/
'e-mail：mnd@mndsoft.com
'OICQ : 88382850
'****************************************************************************
'为尊重作者，以下是原版信息，不做翻译
'========================================================================================
' Class: cMagneticWnd.cls
' Author: Carles P.V. - ?004 (*)
' Dependencies:
' Last revision: 2004.11.30
' Version: 1.0.8
' History:
'
' 1.0.0: First release.
'
' 1.0.1: Use of DeferWindowPos() instead of MoveWindow.
' Better in case of moving/sizing multiple windows simultaneously.
' Thanks to jeremyxtz for suggestion.
'
' 1.0.2: Hereditary glueing.
'
' 1.0.3: - Removed 'RemoveWindow()' method.
' Now, class process WM_DESTROY message and automatically removes window.
' - Glueing checked in AddWindow().
'
' 1.0.4: Fixed: incorrect checking of 'hereditary glueing'.
' I hope it's working fine now! Sorry.
'
' 1.0.5: Final update, I hope.
' Added: hereditary magnetism (magnetism is also working for child windows).
' I think that WinAmp's *behaviour* is now fully emulated :-)
'
' 1.0.6: Never say final update:
' Added CheckGlueing() method. Call in case repositioning manually a window
' and want to enable/check (glue) again, if any. This was only checked for
' first time when new window added to collection.
' Thanks to Gandolf_The_GUI for info.
'
' 1.0.7: Returning to manual destroying window (W9x problems)
'
' 1.0.8: - Added processing of WM_SYSCOMMAND and WM_COMMAND:
' 1. When window *state* is changed from 'system menu' or caption buttons.
' 2. When window *state* is changed *externaly*.
' Thanks to LaVolpe for suggesting solution.
' - Added checking for maximized windows: At time to extract rectangles,
' maximized windows will take work area rectangle. This avoids edge
' offset that causes real window rectangle to go out of screen (work) area.
'----------------------------------------------------------------------------------------
'Option Explicit
'========================================================================================
' Subclasser declarations
'========================================================================================
Private Enum eMsgWhen
[MSG_AFTER] = 1 'Message calls back after the original (previous) WndProc
[MSG_BEFORE] = 2 'Message calls back before the original (previous) WndProc
[MSG_BEFORE_AND_AFTER] = MSG_AFTER Or MSG_BEFORE 'Message calls back before and after the original (previous) WndProc
End Enum
Private Const ALL_MESSAGES As Long = -1 'All messages added or deleted
Private Const CODE_LEN As Long = 197 'Length of the machine code in bytes
Private Const GWL_WNDPROC As Long = -4 'Get/SetWindow offset to the WndProc procedure address
Private Const PATCH_04 As Long = 88 'Table B (before) address patch offset
Private Const PATCH_05 As Long = 93 'Table B (before) entry count patch offset
Private Const PATCH_08 As Long = 132 'Table A (after) address patch offset
Private Const PATCH_09 As Long = 137 'Table A (after) entry count patch offset
Private Type tSubData 'Subclass data type
hWnd As Long 'Handle of the window being subclassed
nAddrSub As Long 'The address of our new WndProc (allocated memory).
nAddrOrig As Long 'The address of the pre-existing WndProc
nMsgCntA As Long 'Msg after table entry count
nMsgCntB As Long 'Msg before table entry count
aMsgTblA() As Long 'Msg after table array
aMsgTblB() As Long 'Msg Before table array
End Type
Private sc_aSubData() As tSubData 'Subclass data array
Private sc_aBuf(1 To CODE_LEN) As Byte 'Code buffer byte array
Private sc_pCWP As Long 'Address of the CallWindowsProc
Private sc_pEbMode As Long 'Address of the EbMode IDE break/stop/running function
Private sc_pSWL As Long 'Address of the SetWindowsLong function
Private Declare Sub RtlMoveMemory Lib "kernel32" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function GetModuleHandleA Lib "kernel32" (ByVal lpModuleName As String) As Long
Private Declare Function GetProcAddress Lib "kernel32" (ByVal hModule As Long, ByVal lpProcName As String) As Long
Private Declare Function GlobalAlloc Lib "kernel32" (ByVal wFlags As Long, ByVal dwBytes As Long) As Long
Private Declare Function GlobalFree Lib "kernel32" (ByVal hMem As Long) As Long
Private Declare Function SetWindowLongA Lib "user32" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function VirtualProtect Lib "kernel32" (lpAddress As Any, ByVal dwSize As Long, ByVal flNewProtect As Long, lpflOldProtect As Long) As Long
'========================================================================================
' cMagneticWnd
'========================================================================================
'-- API
Private Type POINTAPI
x1 As Long
y1 As Long
End Type
Private Type RECT2
x1 As Long
y1 As Long
x2 As Long
y2 As Long
End Type
Private Const SPI_GETWORKAREA As Long = 48
Private Const WM_SIZING As Long = &H214
Private Const WM_MOVING As Long = &H216
Private Const WM_ENTERSIZEMOVE As Long = &H231
Private Const WM_EXITSIZEMOVE As Long = &H232
Private Const WM_SYSCOMMAND As Long = &H112
Private Const WM_COMMAND As Long = &H111
Private Const WMSZ_LEFT As Long = 1
Private Const WMSZ_RIGHT As Long = 2
Private Const WMSZ_TOP As Long = 3
Private Const WMSZ_TOPLEFT As Long = 4
Private Const WMSZ_TOPRIGHT As Long = 5
Private Const WMSZ_BOTTOM As Long = 6
Private Const WMSZ_BOTTOMLEFT As Long = 7
Private Const WMSZ_BOTTOMRIGHT As Long = 8
Private Const SC_MINIMIZE As Long = &HF020&
Private Const SC_RESTORE As Long = &HF120&
Private Const SWP_NOSIZE As Long = &H1
Private Const SWP_NOZORDER As Long = &H4
Private Const SWP_NOACTIVATE As Long = &H10
Private Declare Function SystemParametersInfo Lib "user32" Alias "SystemParametersInfoA" (ByVal uAction As Long, ByVal uParam As Long, lpvParam As Any, ByVal fuWinIni As Long) As Long
Private Declare Function IsWindow Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function IsZoomed Lib "user32" (ByVal hWnd As Long) As Long
Private Declare Function BeginDeferWindowPos Lib "user32" (ByVal nNumWindows As Long) As Long
Private Declare Function DeferWindowPos Lib "user32" (ByVal hWinPosInfo As Long, ByVal hWnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Private Declare Function EndDeferWindowPos Lib "user32" (ByVal hWinPosInfo As Long) As Long
Private Declare Function GetCursorPos Lib "user32" (lpPoint As POINTAPI) As Long
Private Declare Function GetWindowRect Lib "user32" (ByVal hWnd As Long, lpRect As RECT2) As Long
Private Declare Function OffsetRect Lib "user32" (lpRect As RECT2, ByVal x As Long, ByVal y As Long) As Long
Private Declare Function UnionRect Lib "user32" (lpDestRect As RECT2, lpSrc1Rect As RECT2, lpSrc2Rect As RECT2) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (pDest As Any, pSrc As Any, ByVal ByteLen As Long)
'-- Private types:
Private Type WND_INFO
hWnd As Long
hWndParent As Long
Glue As Boolean
End Type
'-- Private constants:
Private Const LB_RECT As Long = 16
'-- Private variables:
Private m_uWndInfo() As WND_INFO
Private m_lWndCount As Long
Private m_rcWnd() As RECT2
Private m_ptAnchor As POINTAPI
Private m_ptOffset As POINTAPI
Private m_ptCurr As POINTAPI
Private m_ptLast As POINTAPI
'-- Property variables:
Private m_lSnapWidth As Long
'//
Private Sub Class_Initialize()
'-- Default snap width
m_lSnapWidth = 10
'-- Initialize array (handled windows info)
ReDim m_uWndInfo(0) As WND_INFO
m_lWndCount = 0
End Sub
Private Sub Class_Terminate()
'-- Stop subclassing
If (m_lWndCount) Then
Call Subclass_StopAll
End If
End Sub
'========================================================================================
' Subclass handler: MUST be the first Public routine in this file.
' That includes public properties also.
'========================================================================================
Public Sub zSubclass_Proc(ByVal bBefore As Boolean, ByRef bHandled As Boolean, ByRef lReturn As Long, ByRef lng_hWnd As Long, ByRef uMsg As Long, ByRef wParam As Long, ByRef lParam As Long)
'
'Parameters:
' bBefore - Indicates whether the the message is being processed before or after the default handler - only really needed if a message is set to callback both before & after.
' bHandled - Set this variable to True in a 'before' callback to prevent the message being subsequently processed by the default handler... and if set, an 'after' callback
' lReturn - Set this variable as per your intentions and requirements, see the MSDN documentation for each individual message value.
' lng_hWnd - The window handle
' uMsg - The message number
' wParam - Message related data
' lParam - Message related data
'
'Notes:
' If you really know what you're doing, it's possible to change the values of the
' hWnd, uMsg, wParam and lParam parameters in a 'before' callback so that different
' values get passed to the default handler.. and optionaly, the 'after' callback
Dim rcWnd As RECT2
Dim lc As Long
Select Case uMsg
'-- Size/Move starting
Case WM_ENTERSIZEMOVE
'-- Get Desktop area (as first rectangle)
Call SystemParametersInfo(SPI_GETWORKAREA, 0, m_rcWnd(0), 0)
'-- Get rectangles of all handled windows
For lc = 1 To m_lWndCount
'-- Window maximized ?
If (IsZoomed(m_uWndInfo(lc).hWnd)) Then
'-- Take work are rectangle
Call CopyMemory(m_rcWnd(lc), m_rcWnd(0), LB_RECT)
Else
'-- Get window rectangle
Call GetWindowRect(m_uWndInfo(lc).hWnd, m_rcWnd(lc))
End If
'-- Is it our current window ?
If (m_uWndInfo(lc).hWnd = lng_hWnd) Then
'-- Get anchor-offset
Call GetCursorPos(m_ptAnchor)
Call GetCursorPos(m_ptLast)
m_ptOffset.x1 = m_rcWnd(lc).x1 - m_ptLast.x1
m_ptOffset.y1 = m_rcWnd(lc).y1 - m_ptLast.y1
End If
Next lc
'-- Sizing
Case WM_SIZING
Call CopyMemory(rcWnd, ByVal lParam, LB_RECT)
Call pvSizeRect(lng_hWnd, rcWnd, wParam)
Call CopyMemory(ByVal lParam, rcWnd, LB_RECT)
bHandled = True
lReturn = 1
'-- Moving
Case WM_MOVING
Call CopyMemory(rcWnd, ByVal lParam, LB_RECT)
Call pvMoveRect(lng_hWnd, rcWnd)
Call CopyMemory(ByVal lParam, rcWnd, LB_RECT)
bHandled = True
lReturn = 1
'-- Size/Move finishing
Case WM_EXITSIZEMOVE
Call pvCheckGlueing
'-- Special case: *menu* call
Case WM_SYSCOMMAND
If (wParam = SC_MINIMIZE Or wParam = SC_RESTORE) Then
Call pvCheckGlueing
End If
'-- Special case: *control* call
Case WM_COMMAND
Call pvCheckGlueing
End Select
End Sub
'========================================================================================
' Methods
'========================================================================================
Public Function AddWindow(ByVal hWnd As Long, Optional ByVal hWndParent As Long = 0) As Boolean
Dim lc As Long
'-- Already in collection ?
For lc = 1 To m_lWndCount
If (hWnd = m_uWndInfo(lc).hWnd) Then Exit Function
Next lc
'-- Validate windows
If (IsWindow(hWnd) And (IsWindow(hWndParent) Or hWndParent = 0)) Then
'-- Increase count
m_lWndCount = m_lWndCount + 1
'-- Resize arrays
ReDim Preserve m_uWndInfo(0 To m_lWndCount)
ReDim Preserve m_rcWnd(0 To m_lWndCount)
'-- Add info
With m_uWndInfo(m_lWndCount)
.hWnd = hWnd
.hWndParent = hWndParent
End With
'-- Check glueing for first time
Call pvCheckGlueing
'-- Start subclassing
Call Subclass_Start(hWnd)
Call Subclass_AddMsg(hWnd, WM_ENTERSIZEMOVE)
Call Subclass_AddMsg(hWnd, WM_SIZING, [MSG_BEFORE])
Call Subclass_AddMsg(hWnd, WM_MOVING, [MSG_BEFORE])
Call Subclass_AddMsg(hWnd, WM_EXITSIZEMOVE)
Call Subclass_AddMsg(hWnd, WM_SYSCOMMAND)
Call Subclass_AddMsg(hWnd, WM_COMMAND)
'-- Success
AddWindow = True
End If
End Function
Public Function RemoveWindow(ByVal hWnd As Long) As Boolean
Dim lc1 As Long
Dim lc2 As Long
For lc1 = 1 To m_lWndCount
If (hWnd = m_uWndInfo(lc1).hWnd) Then
'-- Move down
For lc2 = lc1 To m_lWndCount - 1
m_uWndInfo(lc2) = m_uWndInfo(lc2 + 1)
Next lc2
'-- Resize arrays
m_lWndCount = m_lWndCount - 1
ReDim Preserve m_uWndInfo(m_lWndCount)
ReDim Preserve m_rcWnd(m_lWndCount)
'-- Remove parent relationships
For lc2 = 1 To m_lWndCount
If (m_uWndInfo(lc2).hWndParent = hWnd) Then
m_uWndInfo(lc2).hWndParent = 0
End If
Next lc2
'-- Stop subclassing / verify connections
Call Subclass_Stop(hWnd)
Call pvCheckGlueing
'-- Success
RemoveWindow = True
Exit For
End If
Next lc1
End Function
Public Sub CheckGlueing()
'-- Check ALL windows for possible new *connections*.
Call pvCheckGlueing
End Sub
'========================================================================================
' Properties
'========================================================================================
Public Property Get SnapWidth() As Long
SnapWidth = m_lSnapWidth
End Property
Public Property Let SnapWidth(ByVal New_SnapWidth As Long)
m_lSnapWidth = New_SnapWidth
End Property
'========================================================================================
' Private
'========================================================================================
Private Sub pvSizeRect(ByVal hWnd As Long, rcWnd As RECT2, ByVal lfEdge As Long)
Dim rcTmp As RECT2
Dim lc As Long
'-- Get a copy
Call CopyMemory(rcTmp, rcWnd, LB_RECT)
'-- Check all windows
For lc = 0 To m_lWndCount
With m_rcWnd(lc)
'-- Avoid current window
If (m_uWndInfo(lc).hWnd <> hWnd) Then
'-- X magnetism
If (rcWnd.y1 < .y2 + m_lSnapWidth And rcWnd.y2 > .y1 - m_lSnapWidth) Then
Select Case lfEdge
Case WMSZ_LEFT, WMSZ_TOPLEFT, WMSZ_BOTTOMLEFT
Select Case True
Case Abs(rcTmp.x1 - .x1) < m_lSnapWidth: rcWnd.x1 = .x1
Case Abs(rcTmp.x1 - .x2) < m_lSnapWidth: rcWnd.x1 = .x2
End Select
Case WMSZ_RIGHT, WMSZ_TOPRIGHT, WMSZ_BOTTOMRIGHT
Select Case True
Case Abs(rcTmp.x2 - .x1) < m_lSnapWidth: rcWnd.x2 = .x1
Case Abs(rcTmp.x2 - .x2) < m_lSnapWidth: rcWnd.x2 = .x2
End Select
End Select
End If
'-- Y magnetism
If (rcWnd.x1 < .x2 + m_lSnapWidth And rcWnd.x2 > .x1 - m_lSnapWidth) Then
Select Case lfEdge
Case WMSZ_TOP, WMSZ_TOPLEFT, WMSZ_TOPRIGHT
Select Case True
Case Abs(rcTmp.y1 - .y1) < m_lSnapWidth: rcWnd.y1 = .y1
Case Abs(rcTmp.y1 - .y2) < m_lSnapWidth: rcWnd.y1 = .y2
End Select
Case WMSZ_BOTTOM, WMSZ_BOTTOMLEFT, WMSZ_BOTTOMRIGHT
Select Case True
Case Abs(rcTmp.y2 - .y1) < m_lSnapWidth: rcWnd.y2 = .y1
Case Abs(rcTmp.y2 - .y2) < m_lSnapWidth: rcWnd.y2 = .y2
End Select
End Select
End If
End If
End With
Next lc
End Sub
Private Sub pvMoveRect(ByVal hWnd As Long, rcWnd As RECT2)
Dim lc1 As Long
Dim lc2 As Long
Dim lWId As Long
Dim rcTmp As RECT2
Dim lOffx As Long
Dim lOffy As Long
Dim hDWP As Long
'== Get current cursor position
Call GetCursorPos(m_ptCurr)
'== Check magnetism for current window
'-- 'Move' current window
Call OffsetRect(rcWnd, (m_ptCurr.x1 - rcWnd.x1) + m_ptOffset.x1, 0)
Call OffsetRect(rcWnd, 0, (m_ptCurr.y1 - rcWnd.y1) + m_ptOffset.y1)
'-- Check all windows
For lc1 = 0 To m_lWndCount
'-- Avoid current window
If (m_uWndInfo(lc1).hWnd <> hWnd) Then
'-- Avoid child windows
If (m_uWndInfo(lc1).Glue = False Or m_uWndInfo(lc1).hWndParent <> hWnd) Then
With m_rcWnd(lc1)
'-- X magnetism
If (rcWnd.y1 < .y2 + m_lSnapWidth And rcWnd.y2 > .y1 - m_lSnapWidth) Then
Select Case True
Case Abs(rcWnd.x1 - .x1) < m_lSnapWidth: lOffx = .x1 - rcWnd.x1
Case Abs(rcWnd.x1 - .x2) < m_lSnapWidth: lOffx = .x2 - rcWnd.x1
Case Abs(rcWnd.x2 - .x1) < m_lSnapWidth: lOffx = .x1 - rcWnd.x2
Case Abs(rcWnd.x2 - .x2) < m_lSnapWidth: lOffx = .x2 - rcWnd.x2
End Select
End If
'-- Y magnetism
If (rcWnd.x1 < .x2 + m_lSnapWidth And rcWnd.x2 > .x1 - m_lSnapWidth) Then
Select Case True
Case Abs(rcWnd.y1 - .y1) < m_lSnapWidth: lOffy = .y1 - rcWnd.y1
Case Abs(rcWnd.y1 - .y2) < m_lSnapWidth: lOffy = .y2 - rcWnd.y1
Case Abs(rcWnd.y2 - .y1) < m_lSnapWidth: lOffy = .y1 - rcWnd.y2
Case Abs(rcWnd.y2 - .y2) < m_lSnapWidth: lOffy = .y2 - rcWnd.y2
End Select
End If
End With
End If
End If
Next lc1
'== Check magnetism for child windows
For lc1 = 1 To m_lWndCount
'-- Child and connected window ?
If (m_uWndInfo(lc1).Glue And m_uWndInfo(lc1).hWndParent = hWnd) Then
'-- 'Move' child window
Call CopyMemory(rcTmp, m_rcWnd(lc1), LB_RECT)
Call OffsetRect(rcTmp, m_ptCurr.x1 - m_ptAnchor.x1, 0)
Call OffsetRect(rcTmp, 0, m_ptCurr.y1 - m_ptAnchor.y1)
For lc2 = 0 To m_lWndCount
If (lc1 <> lc2) Then
'-- Avoid child windows
If (m_uWndInfo(lc2).Glue = False And m_uWndInfo(lc2).hWnd <> hWnd) Then
With m_rcWnd(lc2)
'-- X magnetism
If (rcTmp.y1 < .y2 + m_lSnapWidth And rcTmp.y2 > .y1 - m_lSnapWidth) Then
Select Case True
Case Abs(rcTmp.x1 - .x1) < m_lSnapWidth: lOffx = .x1 - rcTmp.x1
Case Abs(rcTmp.x1 - .x2) < m_lSnapWidth: lOffx = .x2 - rcTmp.x1
Case Abs(rcTmp.x2 - .x1) < m_lSnapWidth: lOffx = .x1 - rcTmp.x2
Case Abs(rcTmp.x2 - .x2) < m_lSnapWidth: lOffx = .x2 - rcTmp.x2
End Select
End If
'-- Y magnetism
If (rcTmp.x1 < .x2 + m_lSnapWidth And rcTmp.x2 > .x1 - m_lSnapWidth) Then
Select Case True
Case Abs(rcTmp.y1 - .y1) < m_lSnapWidth: lOffy = .y1 - rcTmp.y1
Case Abs(rcTmp.y1 - .y2) < m_lSnapWidth: lOffy = .y2 - rcTmp.y1
Case Abs(rcTmp.y2 - .y1) < m_lSnapWidth: lOffy = .y1 - rcTmp.y2
Case Abs(rcTmp.y2 - .y2) < m_lSnapWidth: lOffy = .y2 - rcTmp.y2
End Select
End If
End With
End If
End If
Next lc2
End If
Next lc1
'== Apply offsets
Call OffsetRect(rcWnd, lOffx, lOffy)
'== Glueing (move child windows, if any)
hDWP = BeginDeferWindowPos(1)
For lc1 = 1 To m_lWndCount
With m_uWndInfo(lc1)
'-- Is parent our current window ?
If (.hWndParent = hWnd And .Glue) Then
'-- Move 'child' window
lWId = pvWndGetInfoIndex(hWnd)
With m_rcWnd(lc1)
Call DeferWindowPos(hDWP, m_uWndInfo(lc1).hWnd, 0, .x1 - (m_rcWnd(lWId).x1 - rcWnd.x1), .y1 - (m_rcWnd(lWId).y1 - rcWnd.y1), 0, 0, SWP_NOACTIVATE Or SWP_NOSIZE Or SWP_NOZORDER)
End With
End If
End With
Next lc1
Call EndDeferWindowPos(hDWP)
'== Store last cursor position
m_ptLast = m_ptCurr
End Sub
Private Sub pvCheckGlueing()
Dim lcMain As Long
Dim lc1 As Long
Dim lc2 As Long
Dim lWId As Long
'-- Get all windows rectangles / Reset glueing
For lc1 = 1 To m_lWndCount
Call GetWindowRect(m_uWndInfo(lc1).hWnd, m_rcWnd(lc1))
m_uWndInfo(lc1).Glue = False
Next lc1
'-- Check direct connection
For lc1 = 1 To m_lWndCount
If (m_uWndInfo(lc1).hWndParent) Then
'-- Get parent window info index
lWId = pvWndParentGetInfoIndex(m_uWndInfo(lc1).hWndParent)
'-- Connected ?
m_uWndInfo(lc1).Glue = pvWndsConnected(m_rcWnd(lWId), m_rcWnd(lc1))
End If
Next lc1
'-- Check indirect connection
For lcMain = 1 To m_lWndCount
For lc1 = 1 To m_lWndCount
If (m_uWndInfo(lc1).Glue) Then
For lc2 = 1 To m_lWndCount
If (lc1 <> lc2) Then
If (m_uWndInfo(lc1).hWndParent = m_uWndInfo(lc2).hWndParent) Then
'-- Connected ?
If (m_uWndInfo(lc2).Glue = False) Then
m_uWndInfo(lc2).Glue = pvWndsConnected(m_rcWnd(lc1), m_rcWnd(lc2))
End If
End If
End If
Next lc2
End If
Next lc1
Next lcMain
End Sub
Private Function pvWndsConnected(rcWnd1 As RECT2, rcWnd2 As RECT2) As Boolean
Dim rcUnion As RECT2
'-- Calc. union rectangle of windows
Call UnionRect(rcUnion, rcWnd1, rcWnd2)
'-- Bounding glue-rectangle
If ((rcUnion.x2 - rcUnion.x1) <= (rcWnd1.x2 - rcWnd1.x1) + (rcWnd2.x2 - rcWnd2.x1) And _
(rcUnion.y2 - rcUnion.y1) <= (rcWnd1.y2 - rcWnd1.y1) + (rcWnd2.y2 - rcWnd2.y1) _
) Then
'-- Edge coincidences ?
If (rcWnd1.x1 = rcWnd2.x1 Or rcWnd1.x1 = rcWnd2.x2 Or _
rcWnd1.x2 = rcWnd2.x1 Or rcWnd1.x2 = rcWnd2.x2 Or _
rcWnd1.y1 = rcWnd2.y1 Or rcWnd1.y1 = rcWnd2.y2 Or _
rcWnd1.y2 = rcWnd2.y1 Or rcWnd1.y2 = rcWnd2.y2 _
) Then
pvWndsConnected = True
End If
End If
End Function
Private Function pvWndGetInfoIndex(ByVal hWnd As Long) As Long
Dim lc As Long
For lc = 1 To m_lWndCount
If (m_uWndInfo(lc).hWnd = hWnd) Then
pvWndGetInfoIndex = lc
Exit For
End If
Next lc
End Function
Private Function pvWndParentGetInfoIndex(ByVal hWndParent As Long) As Long
Dim lc As Long
For lc = 1 To m_lWndCount
If (m_uWndInfo(lc).hWnd = hWndParent) Then
pvWndParentGetInfoIndex = lc
Exit For
End If
Next lc
End Function
'========================================================================================
' Subclass code - The programmer may call any of the following Subclass_??? routines
'========================================================================================
Private Sub Subclass_AddMsg(ByVal lng_hWnd As Long, ByVal uMsg As Long, Optional ByVal When As eMsgWhen = MSG_AFTER)
'Add a message to the table of those that will invoke a callback. You should Subclass_Start first and then add the messages
'Parameters:
' lng_hWnd - The handle of the window for which the uMsg is to be added to the callback table
' uMsg - The message number that will invoke a callback. NB Can also be ALL_MESSAGES, ie all messages will callback
' When - Whether the msg is to callback before, after or both with respect to the the default (previous) handler
With sc_aSubData(zIdx(lng_hWnd))
If (When And eMsgWhen.MSG_BEFORE) Then
Call zAddMsg(uMsg, .aMsgTblB, .nMsgCntB, eMsgWhen.MSG_BEFORE, .nAddrSub)
End If
If (When And eMsgWhen.MSG_AFTER) Then
Call zAddMsg(uMsg, .aMsgTblA, .nMsgCntA, eMsgWhen.MSG_AFTER, .nAddrSub)
End If
End With
End Sub
Private Sub Subclass_DelMsg(ByVal lng_hWnd As Long, ByVal uMsg As Long, Optional ByVal When As eMsgWhen = MSG_AFTER)
'Delete a message from the table of those that will invoke a callback.
'Parameters:
' lng_hWnd - The handle of the window for which the uMsg is to be removed from the callback table
' uMsg - The message number that will be removed from the callback table. NB Can also be ALL_MESSAGES, ie all messages will callback
' When - Whether the msg is to be removed from the before, after or both callback tables
With sc_aSubData(zIdx(lng_hWnd))
If (When And eMsgWhen.MSG_BEFORE) Then
Call zDelMsg(uMsg, .aMsgTblB, .nMsgCntB, eMsgWhen.MSG_BEFORE, .nAddrSub)
End If
If (When And eMsgWhen.MSG_AFTER) Then
Call zDelMsg(uMsg, .aMsgTblA, .nMsgCntA, eMsgWhen.MSG_AFTER, .nAddrSub)
End If
End With
End Sub
Private Function Subclass_InIDE() As Boolean
'Return whether we're running in the IDE.
Debug.Assert zSetTrue(Subclass_InIDE)
End Function
Private Function Subclass_Start(ByVal lng_hWnd As Long) As Long
'Start subclassing the passed window handle
'Parameters:
' lng_hWnd - The handle of the window to be subclassed
'Returns;
' The sc_aSubData() index
Dim i As Long 'Loop index
Dim J As Long 'Loop index
Dim nSubIdx As Long 'Subclass data index
Dim sSubCode As String 'Subclass code string
Const GMEM_FIXED As Long = 0 'Fixed memory GlobalAlloc flag
Const PAGE_EXECUTE_READWRITE As Long = &H40& 'Allow memory to execute without violating XP SP2 Data Execution Prevention
Const PATCH_01 As Long = 18 'Code buffer offset to the location of the relative address to EbMode
Const PATCH_02 As Long = 68 'Address of the previous WndProc
Const PATCH_03 As Long = 78 'Relative address of SetWindowsLong
Const PATCH_06 As Long = 116 'Address of the previous WndProc
Const PATCH_07 As Long = 121 'Relative address of CallWindowProc
Const PATCH_0A As Long = 186 'Address of the owner object
Const FUNC_CWP As String = "CallWindowProcA" 'We use CallWindowProc to call the original WndProc
Const FUNC_EBM As String = "EbMode" 'VBA's EbMode function allows the machine code thunk to know if the IDE has stopped or is on a breakpoint
Const FUNC_SWL As String = "SetWindowLongA" 'SetWindowLongA allows the cSubclasser machine code thunk to unsubclass the subclasser itself if it detects via the EbMode function that the IDE has stopped
Const MOD_USER As String = "user32" 'Location of the SetWindowLongA & CallWindowProc functions
Const MOD_VBA5 As String = "vba5" 'Location of the EbMode function if running VB5
Const MOD_VBA6 As String = "vba6" 'Location of the EbMode function if running VB6
'If it's the first time through here..
If (sc_aBuf(1) = 0) Then
'Build the hex pair subclass string
sSubCode = "5589E583C4F85731C08945FC8945F8EB0EE80000000083F802742185C07424E830000000837DF800750AE838000000E84D0000005F8B45FCC9C21000E826000000EBF168000000006AFCFF7508E800000000EBE031D24ABF00000000B900000000E82D000000C3FF7514FF7510FF750CFF75086800000000E8000000008945FCC331D2BF00000000B900000000E801000000C3E32F09C978078B450CF2AF75248D4514508D4510508D450C508D4508508D45FC508D45F85052B800000000508B00FF501CC3"
'Convert the string from hex pairs to bytes and store in the machine code buffer
i = 1
Do While J < CODE_LEN
J = J + 1
sc_aBuf(J) = CByte("&H" & Mid$(sSubCode, i, 2)) 'Convert a pair of hex characters to an eight-bit value and store in the static code buffer array
i = i + 2
Loop 'Next pair of hex characters
'Get API function addresses
If (Subclass_InIDE) Then 'If we're running in the VB IDE
sc_aBuf(16) = &H90 'Patch the code buffer to enable the IDE state code
sc_aBuf(17) = &H90 'Patch the code buffer to enable the IDE state code
sc_pEbMode = zAddrFunc(MOD_VBA6, FUNC_EBM) 'Get the address of EbMode in vba6.dll
If (sc_pEbMode = 0) Then 'Found?
sc_pEbMode = zAddrFunc(MOD_VBA5, FUNC_EBM) 'VB5 perhaps
End If
End If
Call zPatchVal(VarPtr(sc_aBuf(1)), PATCH_0A, ObjPtr(Me)) 'Patch the address of this object instance into the static machine code buffer
sc_pCWP = zAddrFunc(MOD_USER, FUNC_CWP) 'Get the address of the CallWindowsProc function
sc_pSWL = zAddrFunc(MOD_USER, FUNC_SWL) 'Get the address of the SetWindowLongA function
ReDim sc_aSubData(0 To 0) As tSubData 'Create the first sc_aSubData element
Else
nSubIdx = zIdx(lng_hWnd, True)
If (nSubIdx = -1) Then 'If an sc_aSubData element isn't being re-cycled
nSubIdx = UBound(sc_aSubData()) + 1 'Calculate the next element
ReDim Preserve sc_aSubData(0 To nSubIdx) As tSubData 'Create a new sc_aSubData element
End If
Subclass_Start = nSubIdx
End If
With sc_aSubData(nSubIdx)
.nAddrSub = GlobalAlloc(GMEM_FIXED, CODE_LEN) 'Allocate memory for the machine code WndProc
Call VirtualProtect(ByVal .nAddrSub, CODE_LEN, PAGE_EXECUTE_READWRITE, i) 'Mark memory as executable
Call RtlMoveMemory(ByVal .nAddrSub, sc_aBuf(1), CODE_LEN) 'Copy the machine code from the static byte array to the code array in sc_aSubData
.hWnd = lng_hWnd 'Store the hWnd
.nAddrOrig = SetWindowLongA(.hWnd, GWL_WNDPROC, .nAddrSub) 'Set our WndProc in place
Call zPatchRel(.nAddrSub, PATCH_01, sc_pEbMode) 'Patch the relative address to the VBA EbMode api function, whether we need to not.. hardly worth testing
Call zPatchVal(.nAddrSub, PATCH_02, .nAddrOrig) 'Original WndProc address for CallWindowProc, call the original WndProc
Call zPatchRel(.nAddrSub, PATCH_03, sc_pSWL) 'Patch the relative address of the SetWindowLongA api function
Call zPatchVal(.nAddrSub, PATCH_06, .nAddrOrig) 'Original WndProc address for SetWindowLongA, unsubclass on IDE stop
Call zPatchRel(.nAddrSub, PATCH_07, sc_pCWP) 'Patch the relative address of the CallWindowProc api function
End With
End Function
Private Sub Subclass_StopAll()
'Stop all subclassing
Dim i As Long
i = UBound(sc_aSubData()) 'Get the upper bound of the subclass data array
Do While i >= 0 'Iterate through each element
With sc_aSubData(i)
If (.hWnd <> 0) Then 'If not previously Subclass_Stop'd
Call Subclass_Stop(.hWnd) 'Subclass_Stop
End If
End With
i = i - 1 'Next element
Loop
End Sub
Private Sub Subclass_Stop(ByVal lng_hWnd As Long)
'Stop subclassing the passed window handle
'Parameters:
' lng_hWnd - The handle of the window to stop being subclassed
With sc_aSubData(zIdx(lng_hWnd))
Call SetWindowLongA(.hWnd, GWL_WNDPROC, .nAddrOrig) 'Restore the original WndProc
Call zPatchVal(.nAddrSub, PATCH_05, 0) 'Patch the Table B entry count to ensure no further 'before' callbacks
Call zPatchVal(.nAddrSub, PATCH_09, 0) 'Patch the Table A entry count to ensure no further 'after' callbacks
Call GlobalFree(.nAddrSub) 'Release the machine code memory
.hWnd = 0 'Mark the sc_aSubData element as available for re-use
.nMsgCntB = 0 'Clear the before table
.nMsgCntA = 0 'Clear the after table
Erase .aMsgTblB 'Erase the before table
Erase .aMsgTblA 'Erase the after table
End With
End Sub
'----------------------------------------------------------------------------------------
'These z??? routines are exclusively called by the Subclass_??? routines.
'----------------------------------------------------------------------------------------
Private Sub zAddMsg(ByVal uMsg As Long, ByRef aMsgTbl() As Long, ByRef nMsgCnt As Long, ByVal When As eMsgWhen, ByVal nAddr As Long)
'Worker sub for Subclass_AddMsg
Dim nEntry As Long 'Message table entry index
Dim nOff1 As Long 'Machine code buffer offset 1
Dim nOff2 As Long 'Machine code buffer offset 2
If (uMsg = ALL_MESSAGES) Then 'If all messages
nMsgCnt = ALL_MESSAGES 'Indicates that all messages will callback
Else 'Else a specific message number
Do While nEntry < nMsgCnt 'For each existing entry. NB will skip if nMsgCnt = 0
nEntry = nEntry + 1
If (aMsgTbl(nEntry) = 0) Then 'This msg table slot is a deleted entry
aMsgTbl(nEntry) = uMsg 'Re-use this entry
Exit Sub 'Bail
ElseIf (aMsgTbl(nEntry) = uMsg) Then 'The msg is already in the table!
Exit Sub 'Bail
End If
Loop 'Next entry
nMsgCnt = nMsgCnt + 1 'New slot required, bump the table entry count
ReDim Preserve aMsgTbl(1 To nMsgCnt) As Long 'Bump the size of the table.
aMsgTbl(nMsgCnt) = uMsg 'Store the message number in the table
End If
If (When = eMsgWhen.MSG_BEFORE) Then 'If before
nOff1 = PATCH_04 'Offset to the Before table
nOff2 = PATCH_05 'Offset to the Before table entry count
Else 'Else after
nOff1 = PATCH_08 'Offset to the After table
nOff2 = PATCH_09 'Offset to the After table entry count
End If
If (uMsg <> ALL_MESSAGES) Then
Call zPatchVal(nAddr, nOff1, VarPtr(aMsgTbl(1))) 'Address of the msg table, has to be re-patched because Redim Preserve will move it in memory.
End If
Call zPatchVal(nAddr, nOff2, nMsgCnt) 'Patch the appropriate table entry count
End Sub
Private Function zAddrFunc(ByVal sDLL As String, ByVal sProc As String) As Long
'Return the memory address of the passed function in the passed dll
zAddrFunc = GetProcAddress(GetModuleHandleA(sDLL), sProc)
Debug.Assert zAddrFunc 'You may wish to comment out this line if you're using vb5 else the EbMode GetProcAddress will stop here everytime because we look for vba6.dll first
End Function
Private Sub zDelMsg(ByVal uMsg As Long, ByRef aMsgTbl() As Long, ByRef nMsgCnt As Long, ByVal When As eMsgWhen, ByVal nAddr As Long)
'Worker sub for Subclass_DelMsg
Dim nEntry As Long
If (uMsg = ALL_MESSAGES) Then 'If deleting all messages
nMsgCnt = 0 'Message count is now zero
If When = eMsgWhen.MSG_BEFORE Then 'If before
nEntry = PATCH_05 'Patch the before table message count location
Else 'Else after
nEntry = PATCH_09 'Patch the after table message count location
End If
Call zPatchVal(nAddr, nEntry, 0) 'Patch the table message count to zero
Else 'Else deleteting a specific message
Do While nEntry < nMsgCnt 'For each table entry
nEntry = nEntry + 1
If (aMsgTbl(nEntry) = uMsg) Then 'If this entry is the message we wish to delete
aMsgTbl(nEntry) = 0 'Mark the table slot as available
Exit Do 'Bail
End If
Loop 'Next entry
End If
End Sub
Private Function zIdx(ByVal lng_hWnd As Long, Optional ByVal bAdd As Boolean = False) As Long
'Get the sc_aSubData() array index of the passed hWnd
'Get the upper bound of sc_aSubData() - If you get an error here, you're probably Subclass_AddMsg-ing before Subclass_Start
zIdx = UBound(sc_aSubData)
Do While zIdx >= 0 'Iterate through the existing sc_aSubData() elements
With sc_aSubData(zIdx)
If (.hWnd = lng_hWnd) Then 'If the hWnd of this element is the one we're looking for
If (Not bAdd) Then 'If we're searching not adding
Exit Function 'Found
End If
ElseIf (.hWnd = 0) Then 'If this an element marked for reuse.
If (bAdd) Then 'If we're adding
Exit Function 'Re-use it
End If
End If
End With
zIdx = zIdx - 1 'Decrement the index
Loop
If (Not bAdd) Then
Debug.Assert False 'hWnd not found, programmer error
End If
'If we exit here, we're returning -1, no freed elements were found
End Function
Private Sub zPatchRel(ByVal nAddr As Long, ByVal nOffset As Long, ByVal nTargetAddr As Long)
'Patch the machine code buffer at the indicated offset with the relative address to the target address.
Call RtlMoveMemory(ByVal nAddr + nOffset, nTargetAddr - nAddr - nOffset - 4, 4)
End Sub
Private Sub zPatchVal(ByVal nAddr As Long, ByVal nOffset As Long, ByVal nValue As Long)
'Patch the machine code buffer at the indicated offset with the passed value
Call RtlMoveMemory(ByVal nAddr + nOffset, nValue, 4)
End Sub
Private Function zSetTrue(ByRef bValue As Boolean) As Boolean
'Worker function for Subclass_InIDE
zSetTrue = True
bValue = True
End Function
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