Hi,

Copying different versions of VCX/VCT files into the location where the project expects them before a Build works for me (providing they have the same name and implement the expected interface).

What problems would you expect?
Regards,
Viv

>That won't work. You need to define the library to use when you drop the object on the form or subclass it, not when you compile.
>
>>Hi,
>>
>>Here is an example. I have a project that has two class libraries of exact same name (e.g. MYLIB.VCX). Each library reside in a separate folder (MYLIB1 and MYLIB2). Can I use a #DEFINE or something of that sort to set a condition so that when I build an EXE only one of the libraries (matching conditional choice) is included in the EXE file?
>>
>>Thank you in advance for any suggestions.