The DDVIDEOPORTBANDWIDTH structure is defined as :-

struct DDVIDEOPORTBANDWIDTH {
DWORD dwSize;
DWORD dwCaps;
DWORD dwOverlay;
DWORD dwColorkey;
DWORD dwYInterpolate;
DWORD dwYInterpAndColorkey;
DWORD dwReserved1;
DWORD dwReserved2;
};