How to select a item on rightclick using devexpress ListboxControl

To select a item on rightclick using devexpress ListboxControl you need to use the MouseDown Event.
See the samples below.

Sample C#

private void listBoxControl1_MouseDown(object sender, MouseEventArgs e)
{
	listBoxControl1.SelectedIndex = listBoxControl1.IndexFromPoint(new Point(e.X, e.Y));
}

Sample VB.NET

Private Sub listBoxControl1_MouseDown(sender As Object, e As MouseEventArgs)
	listBoxControl1.SelectedIndex = listBoxControl1.IndexFromPoint(New Point(e.X, e.Y))
End Sub

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How to disable Devexpress Node Movement while Drag Drop in C# and VB.NET

To disable Devexpress Node Movement while Drag Drop in C# and VB.NET you can use the following snippet.

Sample C#

private void treeList1_DragOver(object sender, DragEventArgs e) 
{
	e.Effect = DragDropEffects.None;
}

private void treeList1_CalcNodeDragImageIndex(object sender, CalcNodeDragImageIndexEventArgs e) 
{
	e.ImageIndex = -1;
}

Sample VB.NET

Private Sub treeList1_DragOver(ByVal sender As Object, ByVal e As DragEventArgs)
	e.Effect = DragDropEffects.None
End Sub

Private Sub treeList1_CalcNodeDragImageIndex(ByVal sender As Object, ByVal e As CalcNodeDragImageIndexEventArgs)
	e.ImageIndex = -1
End Sub

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