MMIOM_READ

	Overview

	Group

	Quick Info

The MMIOM_READ message is sent to an I/O procedure by the mmioRead function to request that a specified number of bytes be read from an open file.

MMIOM_READ

lParam1 = (LPARAM) lBuffer

lParam2 = (LPARAM) cbRead

Parameters
lBuffer

Address of the buffer to be filled with data read from the file.

cbRead

Number of bytes to read from file.

Return Values
Returns the number of bytes actually read from the file. If no more bytes can be read, the return value is 0. If there is an error, the return value is

Remarks
The I/O procedure is responsible for updating the lDiskOffset member of the MMIOINFO structure to reflect the new file position after the read operation.