The DPCAPS structure is defined as :-

struct DPCAPS {
DWORD dwSize;
DWORD dwFlags;
DWORD dwMaxBufferSize;
DWORD dwMaxQueueSize;
DWORD dwMaxPlayers;
DWORD dwHundredBaud;
DWORD dwLatency;
DWORD dwMaxLocalPlayers;
DWORD dwHeaderLength;
DWORD dwTimeout;
}