Hello Moh Amm,
Can you please give additional information about the problems you are having?
Meanwhile i would suggest you take a look at this help page
from within the online help and also there is a
PDF (RadControls for WinForms Step-by-step Tutorial
For Beginners and Advanced Users)
with a few examples and tutorials and also some Tips And Tricks which you might find useful
Hope this helps, if you have any other questions or comments, please let me know,