EXTERR Function


To return extended error information.




EXTERR returns "extended" error information provided by versions of DOS 3.0 and greater. For versions of DOS earlier than 3.0, EXTERR always returns zero. The single integer argument must be in the range 0-3 as follows:

Value of n Return Value
0Extended error code
1Extended error class
2Extended error suggested action
3Extended error locus

The values returned are not defined by GW-BASIC, but by DOS. Refer to the MS-DOS Programmer's Reference (version 3.0 or later) for a description of the values returned by the DOS extended error function.

The extended error code is actually retrieved and saved by GW-BASIC each time appropriate DOS functions are performed. Thus when an EXTERR function call is made, these saved values are returned.