Perhaps you could create a one line program that does nothing but paint the Messagebox.

If that works correclty, you then perhaps know it is something other than a Messagebox issue.

>Thank you for your reply, I can't upload the form because containe OCX that require licence to run. Im suspecting the OCX is causing the problem. Because the control is having a wrong behavior when is place in a container that belong to a pageframe of 10 pages. it show the control in all the pages even only belong to page 6.