I have the following code for setting up one of the columns for a datagrid:

Dim OtherCorrespondenceCol As New DataGridBoolColumn
OtherCorrespondenceCol.MappingName = "OtherCorrespondence"
OtherCorrespondenceCol.HeaderText = "Other " & ControlChars.CrLf & "Correspondence"
OtherCorrespondenceCol.Width = 95
OtherCorrespondenceCol.AllowNull = False
OtherCorrespondenceCol.FalseValue = False
OtherCorrespondenceCol.TrueValue = True
gridStyle.GridColumnStyles.Add(OtherCorrespondenceCol)

The grid loads fine with existing information. However, when I click on the grid to add a new row, the default value for the checkbox is the greyed out state ("third state"). I want it to default to be not selected (False/0).

What am I missing to make it so the "third state" is not an option? Once I select the checkbox on datagrid, it never allows you to go back to the "third state". Once you have selected it, you can only alternate between checked and unchecked.

Thanks,

Vic