how to loop the auto calculation in data grid view column example : 14 32
32 64
11 75
15 90
the calculation is 32 + 32 = 64 64 +11 =75
ok.. now the problem is what if i edit the first column number 32 to 30 and the answer should be 62 and another problem is the second column will auto count like 75 become 73 90 become 88 anyone know please help ~~

I see no code so I'll offer this.

VB has an event called "onchange" or similar that you can hang your code to fire (run) when a cell changes value.
This is not an offer to write your code or tutor

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