Control Class Overriding?

[ReMEn]

Hi,

I posted on here before about using other characters than integers in a
NumericUpDown control. The responses I got were pertaining to unmanaged code.
My project is managed c++ and this is what I need some help with.

Basically instead of displaying a two digit number in my numericupdown, i
want to separate each digit by a character such as a " ' " or a " | ". I
recently did some searching and came up with this. On MSDN I can see the
class for the NumericUpDown controls for .NET:

public __gc class NumericUpDown : public UpDownBase { };

Is there a way I can "redefine" a NumericUpDown class for my NumericUpDown
control? After reading, I see that the "UpButton" and "DownButton" are the
methods invoked when the user clicks the according arrow on the NumericUpDown
control.

I do not want to validate my NumericUpDown for integers, I would like to
basically write my own code for the "UpButton" and "DownButton" functions in
the class for NumericUpDown. I figure this way I can perform my own
calculation for what actually goes into the NumericUpDown value.

So instead of for instance, " 62 " in my NUD control. I want it to say " 6'2 "

Any way this can be done is managed c++?