[RESOLVED] Determine check only one node at parent

Hi all,
I created a treeview that's only allowed user check on only one node at all parent. Below is my code.

VB Code:

Dim CheckOnlyOne As Node
'checked
k = 0
Set CheckOnlyOne = Node.FirstSibling
j = 0
If CheckOnlyOne.Checked = True Then
    Do Until CheckOnlyOne Is Nothing
        If CheckOnlyOne.Parent Is Nothing Then
            If CheckOnlyOne.Checked = True Then
                j = j + 1
            End If
        End If
        If j > 1 Then
            
            MsgBox "Can select one department only", vbCritical, "Error to select department"
            Node.Checked = False
            Exit Sub
        End If
        Set CheckOnlyOne = CheckOnlyOne.Next
    Loop
End If

The problem is when running debug with breakpoint the node is successfully to unchecked.However, when debugging end the node was checked back.

How to solve my problem ?

Thanks in Advance.

Is this right?

Node.Checked = False

Shouldnt this be

CheckOnlyOne.Checked = False

:confused:

I changed already, but still cannot ... it will unchecked the previous node instead of current node

What does your function do?
Is it to make only one node checked for whole tree or one node checked for the current level?

I solved the problem.
I unchecked the item by using timer..
Thanks ZeeZee

:D.
Thats the only soultion I also could see.
It seems that current node being checked/unchecked cannot be undone.
And the Node is passed as ByVal also.
too bad :(
:wave: