Re: D3D8_GetCreationParameters fix

[Mike Hearn]

On Thu, 08 Jul 2004 18:58:57 -0400, Andrei Barbu wrote:
> It doesn't have to return that memory, DX functions work by taking
> parameters they modify. In essence, that's the point, modifying
> pParameters and returning D3D_OK

Right, what he means is that the parameter is basically a pointer to a
pointer, so you have this:

HRESULT SomeFunc(void **output) {
    
    output = HeapAlloc(GetProcessHeap(), 0, sizeof(whatever)); 
    // that is wrong, as you are just modifying a local argument. 
    // the pointer to the new memory will be lost when the function exits

*output = HeapAlloc(GetProcessHeap(), 0, sizeof(whatever));
    // that's right, as you're now assigning to the location pointed
    // to by output

}

thanks -mike