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getwindowthreadprocessid (user32)
 
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Summary

C# Signature:

[DllImport("user32.dll", SetLastError=true)]
static extern uint GetWindowThreadProcessId(IntPtr hWnd, out uint lpdwProcessId);

VB.Net Signature:

<DllImport("user32.dll", SetLastError:=True)> _
Private Shared Function GetWindowThreadProcessId(ByVal hwnd As IntPtr, _
                          ByRef lpdwProcessId As Integer) As Integer
End Function

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

We can use this API to get ProcessID from Window's Title by combining this function with EnumWindows.

Sample Code:

If objAcc Is Nothing Then
  objAcc = New Application
  Dim lngPid As Integer
  Dim lngAccessHwnd As IntPtr = New IntPtr(objAcc.hWndAccessApp)
  GetWindowThreadProcessId(lngAccessHwnd, lngPid)
End If

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Documentation

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