You'll need the following declarations: Option Explicit Private Type Rect Left As Long Top As Long Right As Long Bottom As Long End Type Private Declare Function FindWindow Lib "User32" Alias "FindWindowA" (ByVal Class As String, ByVal Window As String) As Long Private Declare Function ChildWindowFromPointEx Lib "User32" (ByVal Parent As Long, ByVal X As Long, ByVal Y As Long, ByVal Flags As Long) As Long Private Declare Function GetDC Lib "User32" (ByVal hWnd As Long) As Long Private Declare Function GetClipBox Lib "GDI32" (ByVal hWnd As Long, Rect As Rect) As Long Private Declare Function GetClientRect Lib "User32" (ByVal hWnd As Long, Rect As Rect) As Long Private Declare Function EqualRect Lib "User32" (A As Rect, B As Rect) As Long Private Declare Function ReleaseDC