DosDebug enables the calling application to control another application for debugging purposes. #define INCL_DOSPROCESS #include <os2.h> PVOID pDbgBuf; /*Pointer to the Debug Buffer Structure*/ APIRET rc; /* Return code */ rc = DosDebug(pDbgBuf); Return codes DosDebug returns the following values: 0 NO_ERROR 87 ERROR_INVALID_PARAMETER 95 ERROR_INTERRUPT 115 ERROR_PROTECTION_VIOLATION