Thank you for writing.
We currently do not support described scenarios. There is not a way to set a format to RadSpinEditor different than the numeric format. RadMaskedEditBox will allow you to setup a custom mask to show a defined number of digits along with some text:
.radMaskedEditBox1.MaskType = Telerik.WinControls.UI.MaskType.Standard;
However, it does not support up/down buttons and you should implement Min and Max values on your own.
Let me know if you have any other questions.
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.