This function adds, replaces, removes, or finds an I/O procedure in the initialization file (MMPMMMIO.INI) for MMIO services.

#define INCL_MMIOOS2
#include <os2.h>

PMMINIFILEINFO    pmminifileinfo;  /*  Pointer to MMINIFILEINFO. */
ULONG             ulFlags;         /*  Operation options. */
ULONG             rc;              /*  Return codes. */

rc = mmioIniFileHandler(pmminifileinfo, ulFlags);