How change label value for each click button ??

HELLO every body ,

I'M' new programing in excel vba codes ,
and I need help for change a label value in userform that I'd made by each button click
I want that at each button click an integer variable be incremented and this value be updated in one
label ..

since now thanks everyone , that may help me ..

soon I will send a picture with my form ...

ELETRICA2.xls