Thread: Access Violation Of Memory Buffer WHY??

Right all the initializeation is done before the program enters the real time loop. Therefore everything is already defined.
lpddsPrimary being the surface that is defined with the palette lpddp.
I have fixed the problem it was to do with what some of you were saying.
lpddsPrimary->Lock(NULL,&theSurface, DDLOCK_WAIT | DDLOCK_SURFACEMEMORYPTR , NULL);

I simply put this in a if statement with a failed function, and now there is no error. I would be most grateful if something could explain why this results in solving the error.

Code:

		if (FAILED(lpddsPrimary->Lock(NULL,&theSurface, DDLOCK_WAIT | 
			DDLOCK_SURFACEMEMORYPTR , NULL)))
			return 0;