mmioSendMessage

Syntax

LONG mmioSendMessage(hmmio, wMsg, lParam1, lParam2)

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

Parameters

HMMIO hmmio

Specifies the file handle for a file opened with mmioOpen.

WORD wMsg

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

LONG lParam1

Specifies a parameter for the message.

LONG 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.

See Also

mmioInstallIOProc