DestroyBackBuffer

gistfile1.asm

DestroyBackBuffer PROC hWin:DWORD

        ; determine if we need to destroy the memory DC
	cmp memDC, NULL
	je MemoryDCDeallocated

        ; we do, so kill off these GDI objects
	invoke SelectObject, memDC, memOldBitmap
	invoke DeleteObject, memBitmap
	invoke DeleteDC, memDC

        ; null them out so there's no confusion
	mov memDC, NULL
	mov memOldBitmap, NULL
	mov memBitmap, NULL

MemoryDCDeallocated:

        ; determine if we need to release the window dc
	cmp winDC, NULL
	je WindowDCReleased

        ; we do - release and null
	invoke ReleaseDC, hWin, winDC
	mov winDC, NULL

WindowDCReleased:

	xor eax, eax
	ret

DestroyBackBuffer ENDP