Raising custom errors

[pokasick]

VB help says "to generate the error number 513, assign vbObjectError + 513 to the Number property". When I raise an error in this manner, then display the number in a message box in an error handler, the error number is -2147220991.

Shouldn't the number displayed in the message box be 513? That's what I was hoping for.

It seems strange to me that the error number is supposed to be a whole number between 0 and 65,535, but the vbObjectError constant equals -2147221504. I don't understand how adding 513 to the vbObjectError produces an error number 513.

Can someone help me out with this?

Thanks,
Paul

 

[FRoeCassNet]

vbObjectError has the value of hex 0x80040000. This is for proper COM error detection (requiring a negative value).

You can just raise the error 513, it just won't be listed as an "automation" error, but can still be used to trap errors in calling functions, etc.