This function releases memory allocated for an error-information block.

#define INCL_WINERRORS /* Or use INCL_WIN, INCL_PM, */
#include <os2.h>

PERRINFO    perriErrorInfo;  /*  Error-information block whose memory is to be released. */
BOOL        rc;              /*  Success indicator. */

rc = WinFreeErrorInfo(perriErrorInfo);