SetCooperativeLevel失败

euclid

为什么SetCooperativeLevel总是会失败?
我的程序:
int main(int argc, char *argv[])
{
    LPDIRECTDRAW7 lpdd;
    LPDIRECTDRAWSURFACE7 lpddsprim;
    DDSURFACEDESC2 ddsd;
    HRESULT rev = 0;

    rev = DirectDrawCreateEx (NULL, (LPVOID *)&lpdd, IID_IDirectDraw7, NULL);
    if (rev != DD_OK) {
        printf ("create fail\n");
        getchar ();
        return 0;
    }
    else
        printf ("create success\n");

    rev = lpdd->SetCooperativeLevel (NULL, DDSCL_FULLSCREEN | DDSCL_EXCLUSIVE);
    if (rev != DD_OK) {
        printf ("cooperative fail\n");
        getchar ();
        return 0;
    }
    else
        printf ("cooperative success\n");
....
....

逆火十三

应该是需要一个HWND,创建一个窗口先,最好是创建一个WIN32的应用程序

euclid

是的,谢谢!