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模块代码：
Option Explicit
Private Const GW_HWNDNEXT = 2
Private Declare Function GetParent Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetWindow Lib "user32" (ByVal hwnd As Long,ByVal wCmd As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String,ByVal lpWindowName As String) As Long
Private Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long,lpdwprocessid As Long) As Long
Public Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long,ByVal lpString As String,ByVal cch As Long) As Long
Private Function ProcIDFromWnd(ByVal hwnd As Long) As Long
Dim idProc As Long
' Get PID for this HWnd
GetWindowThreadProcessId hwnd,idProc
' Return PID
ProcIDFromWnd = idProc
End Function
Public Function GetWinHandle(hInstance As Long) As Long
Dim tempHwnd As Long
' Grab the first window handle that Windows finds:
tempHwnd = FindWindow(vbNullString,vbNullString)
' Loop until you find a match or there are no more window handles:
Do Until tempHwnd = 0
' Check if no parent for this window
If GetParent(tempHwnd) = 0 Then
' Check for PID match
If hInstance = ProcIDFromWnd(tempHwnd) Then
' Return found handle
GetWinHandle = tempHwnd
' Exit search loop
Exit Do
End If
End If
' Get the next window handle tempHwnd = GetWindow(tempHwnd,GW_HWNDNEXT) Loop End Function （编辑：李大同）
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