Thanks Vlad I try that.

>Do not call message box. Or cal it from the Click event only.
>
>Ideally, if this is a single component, just call When method of the custom control from GotFocus event of each control inside and use nodefault when failed.
>
>>I've managed to use a combination of these ideas so that a When method sets the internal llAccessible and my code checks that before running anything.
>>
>>By the way a custom control does not have the SetAll method.
>>
>>This has thrown up another problem :)
>>
>>When the user click on the right commandbutton the Control's GotFocus is run (calling the When) the CommandButtons GotFocus is then called. However when a MessageBox is activated this seems to prevent the CommandButtons Click from being called.
>>Any ideas?