This example frees memory allocated (by WinGetErrorInfo) for an error-information block using WinFreeErrorInfo.

#define INCL_WINERRORS          /* Window Error Functions       */
#include <os2.h>

BOOL  fSuccess;         /* success indicator                    */
ERRORID  erridErrorCode;/* last error id code                   */
PERRINFO  perriErrorInfo;/* error info structure                */
HAB   hab;              /* anchor-block handle                  */

/* obtain error block and assign error code */
perriErrorInfo = WinGetErrorInfo(hab);
erridErrorCode = perriErrorInfo->idError;

/* free error block */
fSuccess = WinFreeErrorInfo(perriErrorInfo);