Restoring the Primary Surface

The RestorePrimary function attempts to restore the video memory allocated for the primary surface. This function will be invoked by a DirectX function returning DDERR_SURFACELOST due to a mode switch or full-screen DOS box invalidating video memory.

static HRESULT

RestorePrimary(void)

{

ASSERT(NULL != lpddPrimary);

return lpddPrimary->lpVtbl->Restore(lpddPrimary);

}