Use the Bold property to bold a property. The value for the ShowObjects property is important for the Bold property before adding items. Changing the ShowObjects property has no effect after adding items.

By default, 

• if the ShowObjects property is True, the Bold property is true for all parent items. A parent items contains at least a child item inserted using the Add method. For instance, if the ShowObjects is True, when adding a new item to a parent item, the Bold property of the parent item will be set on True.
• if the ShowObjects property is False, the Bold property is false, for all items.

The following sample shows how to avoid bolding the parent items while building a hierarchy:

With PropertiesList1
    .BeginUpdate
    .ShowObjects = False
    .Add "Root", "", ReadOnly
    With .Add("Child 1", 0, Edit, , "Root")
        .Bold = True
    End With
    With .Add("Child 2", 0, Edit, , "Root")
        .Bold = True
    End With
    .ExpandItem("Root") = True
    .ShowObjects = True
    .EndUpdate
End With

In the sample, the root item is not bolded, instead the child items are bolded.

In the following sample the root item is automatically bolded, and the child items are not: