Use the Bold, Italic, Underline and StrikeOut properties to apply different font attributes to the item. Use the Caption property to display different parts of the caption using HTML format. Use the Font property to specify the control's font. Use the Group property to get the group that owns the item. Use the AllowHighLight property to avoid highlighting an item when the cursor hovers it.

The following VB sample underlines all items in the first group:

Private Sub ExplorerBar1_AddItem(ByVal Item As EXPLORERBARLibCtl.IItem)
    If (Item.Group.Index = 0) Then
        With Item
            .Underline = True
        End With
    End If
End Sub

The following C++ sample underlines all items in the first group:

void OnAddItemExplorerbar1(LPDISPATCH Item) 
{
	CItem item( Item ); item.m_bAutoRelease = FALSE;
	if ( item.GetGroup().GetIndex() == 0 )
		item.SetUnderline( TRUE );
}

The following VB.NET sample underlines all items in the first group:

Private Sub AxExplorerBar1_AddItem(ByVal sender As Object, ByVal e As AxEXPLORERBARLib._IExplorerBarEvents_AddItemEvent) Handles AxExplorerBar1.AddItem
    With e.item
        If (.Group.Index = 0) Then
            .Underline = True
        End If
    End With
End Sub

The following C# sample underlines all items in the first group:

private void axExplorerBar1_AddItem(object sender, AxEXPLORERBARLib._IExplorerBarEvents_AddItemEvent e)
{
	if (e.item.Group.Index == 0)
		e.item.Underline = true;
}

The following VFP sample underlines all items in the first group:

*** ActiveX Control Event ***
LPARAMETERS item

with item
	If (.Group.Index = 0) Then
		.Underline = .t.
	EndIf
endwith