>>This is my first attempt at creating a DLL. Of course it's not going smoothly. I'm getting 1031: User-interface operation not allowed at this time.
>>
>>I understand that I can't have a user-interface in an in-process DLL. The line of code that it's choking on is:
>>
>>lnfields = afields(lafields)
>>
>>What on this line would cause a UI error?
>>
>>paul
>
>I think Jim is correct. The error method in my COM DLLs write error information out to a text file using text merge. You should also look at COMRETURNERROR().

Actually, this ones a little trickier. AFIELDS, like a few other VFP data functions (to my infinite frustration) doesn't throw an error when there is no table open in the current area, it displays an Open dialog. Only after cancelling put of the dialog does the error get thrown.

Paul, to solve your problem, just fix your code and make sure that there is a table open in the current work area. To try to avoid future issues like this, you can see if SYS(2335) will disable this dialog in your dll server (it is really meant for exe servers, but it might do the trick).