"invalid window handle"

[ukusa]

Hiya, started having a problem where after I exit my application, the message "invalid window handle" comes up. Running the program and using most functions doesn't give this error message but when I use a certain reporting functions which may be 3 windows deep from the main menu, this error occurs after ending the program. The error is 1400.

Also, is there a problem when compiling Delphi 5 Pro application on XP and running it on Windows 2000? Does restrictions on a work computer running 2000 should make one install the BDE outside protected directories?

Thanks for any help!