FUNCTION: HRESULT DwmEnableBlurBehindWindow ( HWND hWnd, DWM_BLURBEHIND* pBlurBehind ) ;
FUNCTION: HRESULT DwmIsCompositionEnabled ( BOOL* pfEnabled ) ;
-CONSTANT: WM_DWMCOMPOSITIONCHANGED HEX: 31E
+CONSTANT: WM_DWMCOMPOSITIONCHANGED 0x31E
: composition-enabled? ( -- ? )
windows-major 6 >=