When I registered dao350.dll with regsvr32 and tried opening Visual Basic, it gave me an error: "Unexpected error; quitting"<BR><BR>I don't have the original installation disks, so I can't reinstall.

You probably need to declare area() as PASCAL calling convention and with the EXPORT macro so that it is, indeed, exported from your DLL. You'll also have to defeat C++ "name-mangling", so define it ...

Despite renewed developer hue and cry to do something with "classic" Visual Basic sparked by the recent 25th birthday celebration for the programming language, Microsoft is showing no signs of caving ...