Given a visible, active overlay surface (DDSCAPS_OVERLAY flag set), the IDirectDrawSurface4::GetOverlayPosition method returns the display coordinates of the surface.
HRESULT GetOverlayPosition(
LPLONG lplX,
LPLONG lplY
);
If the method succeeds, the return value is DD_OK.
If the method fails, the return value may be one of the following error values:
DDERR_GENERIC |
DDERR_INVALIDOBJECT |
DDERR_INVALIDPARAMS |
DDERR_INVALIDPOSITION |
DDERR_NOOVERLAYDEST |
DDERR_NOTAOVERLAYSURFACE |
DDERR_OVERLAYNOTVISIBLE |
DDERR_SURFACELOST |
Windows NT/2000: Requires Windows 2000.
Windows 95/98: Requires Windows 95 or later. Available as a redistributable for Windows 95.
Header: Declared in ddraw.h.
Import Library: Use ddraw.lib.
IDirectDrawSurface4::SetOverlayPosition, IDirectDrawSurface4::UpdateOverlay