ArcGIS Engine Developer Guide

BUILDING APPLICATIONS WITH ACTIVEX
4. Run the application. Right-click the PageLayoutControl display area to display
the popup menu, and navigate around the page layout.
Controlling label editing in the TOCControl
By default, the TOCControl allows users to automatically toggle the visibility of
layers and to change map and layer names as they appear in the table of contents.
You will add code to prevent users from editing a name and replacing it with an
empty string.
1. Add the following code to the beginning of the Form_Load event to trigger
the TOCControl label editing events.
Private Sub Form_Load()
' Set label editing to manual.
TOCControl1.LabelEdit = esriTOCControlManual
' Add generic commands…
End Sub
2. Add the following code to the TOCControl1_OnEndLabelEdit event.
Private Sub TOCControl1_OnEndLabelEdit(ByVal x As Long, ByVal y As Long,
ByVal newLabel As String, CanEdit As Boolean)
' If the new label is an empty string, then prevent the edit.
If Trim(newLabel) = "" Then CanEdit = False
End Sub
3. Run the application. To edit a map, layer, heading, or legend class label in the
TOCControl, click it once, and click it a second time to invoke label editing.
Chapter 6 • Developer scenarios • 291