Hi,

I like to learn more about creating class library for my application use.
However, I often encountered the problems of not know whether which
control especially ActiveX which I am using can be sub-class from.

For example, I am creating a new class, to include a timer and 02 ActiveX
controls, since it can simplify my coding. However, I do not
know to sub-class from form, custom or control ? Please advise
and help. Thank you