command button not resetting for calculator program

[excel_lint]

I have programmed a very simple calculator using 0-9 buttons for input. If I want to enter "00", the first click of the 'zero' button works but the second click does nothing. I have to press the 'zero' button a third time to get the second zero to show up in a text box.

Can anyone tell me how to get the buttons to work correctly?

 

[Mark O'Brien]

What have you used to make this calculator program? A userform? or are all of the buttons on a worksheet and they write to a cell?