Datagridview cell validating rules of dating korean movie

the code i have written does the validation when i click on another cell in the datagrid view.

i have written the code to validate the datagridview cell 2 , but whe i clicl cell 3 only the validation event is triggered for cell 2. how can i make the validation trigger so that the value of the current cell is seelcted. events are used to help stop the user from leaving a cell with a bad value.

I have two Data Grid View Textbox Column in my Form.

I want to compare one textbox with another textbox value.

Net 2005, Unbound Data Grid Viewer with 2 (two) columns ("Check Num" Index 0; "Clear Date" Index 1). I tried MS's Help pages and oh, those are useful (heavy sarcasm).