GetWindowRect too small on Windows 7

Question

The actual problem I\'m trying to solve is, I want to automatically find out the size of the margins around windows. If you can find a better way, please by all means answer

Answer 1

I know it is a bit old topic. But it took quite a bit of searching and I went through the ctypes pain myself to get paxdiablo's solution working in Python. Just wanted to share working code sample for wxPython:

try:
    f = ctypes.windll.dwmapi.DwmGetWindowAttribute
except WindowsError:
    f = None
if f: # Vista & 7 stuff
    rect = ctypes.wintypes.RECT()
    DWMWA_EXTENDED_FRAME_BOUNDS = 9
    f(ctypes.wintypes.HWND(self.GetHandle()),
      ctypes.wintypes.DWORD(DWMWA_EXTENDED_FRAME_BOUNDS),
      ctypes.byref(rect),
      ctypes.sizeof(rect)
      )
    size = (rect.right - rect.left, rect.bottom - rect.top)        
else:      
    size = self.GetSize()