Hi Hassan,
Thank you for writing and for the screenshots.
In order to get the desired look, you should do one of the following things:
If you are using RadForm:
If you are using RadRibbonForm:
I hope you will find this useful. If you have further questions feel free to ask.
Best wishes,
Ivan Petrov
the Telerik team
Q3’10 SP1 of RadControls for WinForms is available for
download; also available is the Q1'11
Roadmap for Telerik Windows Forms controls.