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| Author: Michael Bauer | Homepage | | Date: 05.02.2006 | Accessed: 21388 | | | | Description
The sample finds the window of a parent window by its caption and returns its handle.
If you want to find a window of the top level, first call the GetDesktopWindow function and pass the result to the FindChildWindowText function. But you can also pass the handle of any other window to find one of its childs.
Lower or upper cases doesn't matter; and you can search for exact matches or just a part of it by using a trailing asterisk (e.g. "abc*"). |
Option Explicit
Private Declare Function GetWindow Lib "user32" _
(ByVal hwnd As Long, ByVal wCmd As Long) As Long
Private Declare Function GetWindowTextA Lib "user32" _
(ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Private Declare Function GetDesktopWindowA Lib "user32" _
Alias "GetDesktopWindow" () As Long
Const GW_HWNDNEXT = 2
Const GW_CHILD = 5
Public Function GetDesktopWindow() As Long
GetDesktopWindow = GetDesktopWindowA
End Function
Public Function FindChildWindowText(ByVal lHwnd As Long, _
sFind As String _
) As Long
Dim lRes As Long
Dim sFindLC As String
lRes = GetWindow(lHwnd, GW_CHILD)
If lRes Then
sFindLC = LCase$(sFind)
Select Case InStr(sFindLC, "*")
Case Is > 0
Do
If LCase$(GetWindowText(lRes)) Like sFindLC Then
FindChildWindowText = lRes
Exit Function
End If
lRes = GetWindow(lRes, GW_HWNDNEXT)
Loop While lRes <> 0
Case Else
Do
If LCase$(GetWindowText(lRes)) = sFindLC Then
FindChildWindowText = lRes
Exit Function
End If
lRes = GetWindow(lRes, GW_HWNDNEXT)
Loop While lRes <> 0
End Select
End If
End Function
Private Function GetWindowText(ByVal lHwnd As Long) As String
Const STR_SIZE As Long = 256
Dim sBuffer As String * STR_SIZE
Dim lSize As Long
sBuffer = String$(STR_SIZE, vbNullChar)
lSize = GetWindowTextA(lHwnd, sBuffer, STR_SIZE)
If lSize > 0 Then
GetWindowText = left$(sBuffer, lSize)
End If
End Function
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