Take a look at the good old Windows Forms FAQ:

http://www.syncfusion.com/FAQ/WinForms/FAQ_c81c.asp#q626q


>Is there any was I can capture if I am in design mode or in run time? I have some resize code that works great but unfourtunately it also works in design mode i.e. ig i resize my groupbox at design time the controls are resized.
>I assume the solution to this has something to do with preprocessor directives.
>Any help is appreciated.
>Thanks,
>Einar