I think the file you're looking for is called mscal.ocx or maybe msacal70.ocx.
Once you find it there should be a program in your windows system directory called regist32 or something like that...run it with the .ocx file as a parameter to it and it will register it.

>Hi all
>
> I had a Calendar activeX control in one of my form.but today i deleted some of the files from my harddisk,now
> when i run the form i'm getting a error message Class not registered.
>
> how do i locate the Calendar Control and register it.
>
> Thanks for any help.
>
> Khan.