mmioSendMessage

	LRESULT mmioSendMessage(hmmio, wMsg, lParam1, lParam2)
	HMMIO hmmio;
	UINT wMsg;
	LONG lParam1;
	LONG lParam2;

The mmioSendMessage function sends a message to the I/O procedure associated with the specified file.

Parameters

hmmio

Specifies the file handle for a file opened with mmioOpen.

wMsg

Specifies the message to send to the I/O procedure.

lParam1

Specifies a parameter for the message.

lParam2

Specifies a parameter for the message.

Return Value

The return value depends on the message. If the I/O procedure does not recognize the message, the return value is zero.

Comments

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.