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mmioSendMessage function

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

Syntax


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

Parameters

hmmio

File handle for a file opened by using the mmioOpen function.

wMsg

Message to send to the I/O procedure.

lParam1

Parameter for the message.

lParam2

Parameter for the message.

Return value

Returns a value that corresponds to the message. If the I/O procedure does not recognize the message, the return value should be zero.

Remarks

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.

Requirements

Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]

Header

Mmsystem.h (include Windows.h)

Library

Winmm.lib

DLL

Winmm.dll

 

 

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