>It's BaseClass property is 'olecontrol' which is not informative. Using the Object Browser the closest match i can get is MSCAL.ocx in my Microsoft Office folder. I copied that ocx over to the client machine and registered it using regsvr32 but didn't help....
>
>how can i find out what that ActiveX Calendar control is based on?

use the form as a table and browse it.

use myFormName.scx
browse

Look around in there..you'll see it...(somewhere)