Invoking a .Net winform form Outlook

[GHQ Dev]

Hello All,

I have developed an Add-In for outlook in C# , its simply a CommandBarButton
that when clicked invoke a .Net winform Form, I invoke the form like this in
the button event handler
Form myForm = new MyForm();
myForm.ShowDialog()

My Question is:
- is this the right way to invoke the winform from outlook?
- when the form is invoked from a mailitem inspector ,only the inspector is
blocked,
how i prevent the user from working with outlook while the my form is open?

Regards,
Ahmed Yehia