Hello,

I believe the coordinates passed to the BoxClicked events are relative to the box top-left corner, so add X and Y to respectively box.Left and box.Top to get the document coordinates. VB context menus just show up where the mouse is so a VB event handler would look like this:

Private Sub fc_BoxClicked(ByVal box As FLOWCHARTLibCtl.IBoxItem, ByVal button As FLOWCHARTLibCtl.EMouseButton, ByVal x As Long, ByVal y As Long)
    If button <> mbRight Then
       Exit Sub
    End If
   
    Me.PopupMenu mnuPopup
End Sub

In other languages you might have to convert to client or screen coordinates, depending on how context menus are displayed there.

Stoyan

You can use the third party control too - what coordinates does it need to display the menu - client or screen ones ?