OS/2 supplies DosErrClass and DosError for error processing. DosErrClass aids in determining the appropriate action that an application should take in response to an error. DosError enables applications to disable the pop-up windows used by OS/2 to inform the user of a hard-error or an exception.
Note: In the example code fragments that follow, error checking was left out to conserve space. Applications should always check the return code that the functions return. Control Program functions return an APIRET value. A return code of 0 indicates success. If a non-zero value is returned, an error occurred.