If I then ckeck the second checbox (cell_2), it gives me the error message but does not return the second checkbox I checked to its unchecked state. Any help appreciated, Bob Once I'm in this process after the error text has been set, evn my close button, that has just a Me.close() in it does not work. Cancel = True End If End If End Sub Say I checked just one checkbox Cell_1 to start, the code allows the change to be made. I press the sacep key after the e,cancel and the message and I get the same problem. The only reason I'm only getting an error sometimes, is that sometimes the check: if(e. But as indicted in the previousmesssage, sometimes Rows.
Its just that my UI does not respond correctly and I can't expect my users to get out of it that way. Bob "Bob" In a datagridview (vs2005, VB.net) I have two columns that are checkboxes. 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). I would like to be able to validate the cells and force the user to put correct values in it. In a datagridview (vs2005, VB.net) I have two columns that are checkboxes. I need to check that only one of the two can be checked.