IDirectDraw2::FlipToGDISurface

HRESULT FlipToGDISurface();

Makes the surface that GDI writes to the primary surface.

·Returns DD_OK if successful, or one of the following error values otherwise:

DDERR_INVALIDOBJECT

DDERR_INVALIDPARAMS

DDERR_NOTFOUND

This method can be called at the end of a page-flipping application to ensure that the display memory that GDI is writing to is visible to the user.