Hello, I need help, I trying to put a Textbox format Currency, but dont work. for example, the Textbox recive 450.00 the value is money, so I need $ 450.00, but show me only 450

Hello, Raul, 

Thank you for writing.  
 
Instead of using RadTextBox, I would recommend you to use RadMaskedEditBox and use the supported currency mask. Additional information about RadMaskedEditBox is available in the online documentation: http://docs.telerik.com/devtools/winforms/editors/maskededitbox/numeric-masks

I hope this information helps. Should you have further questions I would be glad to help.

Regards,
Dess
Progress Telerik