Can I have a TreeListView with the indeterminate setting asserted programmatically only (and denied to the user)?

I'm using Phillip Piper's ObjectListView wrapper, specifically, a `TreeListView'.

My TreeListView:

• Checkboxes: True
• CheckedAspectName: {name of bool? property in my model)
• HierarchicalCheckboxes: True
• TriStateCheckboxes: true
• View: Details

I set TriStateCheckboxes to True because I want my TreeListView to be able to display the indeterminate symbol in the TreeListView’s checkboxes. However, I don't want the user to ever be able to explicitly set a checkbox to an indeterminate value. Rather, when a user clicks on a checkbox, I want it to toggle only between checked and unchecked. If a branch checkbox and all its children’s checkboxes are checked, and the children's checkboxes transition to a mix of checked and unchecked, I want the branch’s checkbox to show the indeterminate symbol.

In other words, the indeterminate state is ever only to be asserted programmatically and then only on a branch when the checkboxes of the branch’s children are not solely all checked or not solely all unchecked.

Realizing that a tristate checkbox cycles: checked, indeterminate, unchecked, I tried forcing an indeterminate state to an unchecked state when the user clicks on a checked checkbox, but that didn’t work, i.e., the checkbox state in the TreeListView remains unchanged after executing my ObjTreeListViewPreview_ItemChecked code.

Note: the class ClsTreeListViewPreview derives from TreeListView

private void ObjTreeListViewPreview_ItemChecked(object sender, ItemCheckedEventArgs e)
{

    ClsTreeListViewPreview ClsTreeListViewPreview = (ClsTreeListViewPreview)sender;

    if (ClsTreeListViewPreview.MouseMoveHitTest.Item.CheckState == CheckState.Indeterminate)
    {
        ClsTreeListViewPreview.MouseMoveHitTest.Item.CheckState = CheckState.Unchecked;
    }

}

Is what I want possible with a TreeListView that has tristate and hierarchical checkboxes ? If so, which delegates and methods are necessary?