Hi Agnes,

>Hi ,
>
>I create a class (vcx) , but i don't Know how put it on my form by program.
>Please Help me .
>
>Thanks

Goto to "Form Controls ToolBar", click in "View Classes" button, after in "ADD" and select you class library (vcx). It's for visual way.
You can to put it with code. See "AddObject" method. See also "CreateObject" function.
Good luck!