Callback function that you can define in order to receive notification messages during an encode or decode operation.
bool CALLBACK MessageCallback(int nMessageCode, LPVOID lpUserData);
A DeltaMAX message code indicating the current stage of the operation.
Pointer to whatever you want. (Your own user data.)
Return true from this function to allow the operation to continue.
Return false from this function to cause the operation to abort.
You must register your callback function with the engine using pMessageCallback in the DELTAMAX_ENCODE_OPTIONS or DELTAMAX_DECODE_OPTIONS structure that you pass to the DeltaMAXEncode or DeltaMAXDecode function call.
See Also: DELTAMAX_ENCODE_OPTIONS, DELTAMAX_DECODE_OPTIONS, OnProgress