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The mmioSendMessage function sends a message to the I/O procedure associated with the specified file.
LRESULT mmioSendMessage(
HMMIO hmmio, | |
UINT wMsg, | |
LPARAM lParam1, | |
LPARAM lParam2 | |
); |
hmmio
File handle for a file opened by using the mmioOpen function.
wMsg
Message to send to the I/O procedure.
lParam1 and lParam2
Parameters for the message.
Returns a value that corresponds to the message. If the I/O procedure does not recognize the message, the return value should be zero.
Use this function to send custom user-defined messages. Do not use it to send the MMIOM_OPEN, MMIOM_CLOSE, MMIOM_READ, MMIOM_WRITE, MMIOM_WRITEFLUSH, or MMIOM_SEEK messages. Define custom messages to be greater than or equal to the MMIOM_USER constant.
mmioOpen, MMIOM_OPEN, MMIOM_CLOSE, MMIOM_READ, MMIOM_WRITE, MMIOM_WRITEFLUSH, MMIOM_SEEK