Use a MouseDown or MouseUp event procedure to specify actions that will occur when a mouse button is pressed or released. Unlike the Click and DblClick events, MouseDown and MouseUp events lets you distinguish between the left, right, and middle mouse buttons. You can also write code for mouse-keyboard combinations that use the SHIFT, CTRL, and ALT keyboard modifiers. Use the ItemFromPoint property to get the item over cursor. Use the GroupFromPoint property to get the group over cursor. 

The following VB sample displays the caption of the group being clicked:

Private Sub ExplorerBar1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
    With ExplorerBar1
        Dim g As Group
        Set g = .GroupFromPoint(X / Screen.TwipsPerPixelX, Y / Screen.TwipsPerPixelY)
        If Not g Is Nothing Then
            MsgBox g.Caption
        End If
    End With
End Sub

The following VB sample displays the caption of the item being clicked:

Private Sub ExplorerBar1_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
    With ExplorerBar1
        Dim i As Item
        Set i = .ItemFromPoint(X / Screen.TwipsPerPixelX, Y / Screen.TwipsPerPixelY)
        If Not i Is Nothing Then
            MsgBox i.Caption
        End If
    End With
End Sub

The following C++ sample displays the caption of the group being clicked:

void OnMouseUpExplorerbar1(short Button, short Shift, long X, long Y) 
{
	CGroup group = m_explorerbar.GetGroupFromPoint( X, Y );
	if ( group.m_lpDispatch != NULL )
		MessageBox( group.GetCaption() );
}

The following C++ sample displays the caption of the item being clicked:

void OnMouseUpExplorerbar1(short Button, short Shift, long X, long Y) 
{
	CItem item = m_explorerbar.GetItemFromPoint( X, Y );
	if ( item.m_lpDispatch != NULL )
		MessageBox( item.GetCaption() );
}

The following VB.NET sample displays the caption of the group being clicked:

Private Sub AxExplorerBar1_MouseUpEvent(ByVal sender As Object, ByVal e As AxEXPLORERBARLib._IExplorerBarEvents_MouseUpEvent) Handles AxExplorerBar1.MouseDownEvent
    With AxExplorerBar1
        Dim g As EXPLORERBARLib.Group = .get_GroupFromPoint(e.x, e.y)
        If Not g Is Nothing Then
            MsgBox(g.Caption)
        End If
    End With
End Sub

The following VB.NET sample displays the caption of the item being clicked:

Private Sub AxExplorerBar1_MouseUpEvent(ByVal sender As Object, ByVal e As AxEXPLORERBARLib._IExplorerBarEvents_MouseUpEvent) Handles AxExplorerBar1.MouseDownEvent
    With AxExplorerBar1
        Dim i As EXPLORERBARLib.Item = .get_ItemFromPoint(e.x, e.y)
        If Not i Is Nothing Then
            MsgBox(i.Caption)
        End If
    End With
End Sub

The following C# sample displays the caption of the group being clicked:

private void axExplorerBar1_MouseUpEvent(object sender, AxEXPLORERBARLib._IExplorerBarEvents_MouseUpEvent e)
{
	EXPLORERBARLib.Group g = axExplorerBar1.get_GroupFromPoint(e.x, e.y);
	if (g != null)
		MessageBox.Show(g.Caption);
}

The following C# sample displays the caption of the item being clicked:

private void axExplorerBar1_MouseUpEvent(object sender, AxEXPLORERBARLib._IExplorerBarEvents_MouseUpEvent e)
{
	EXPLORERBARLib.Item i = axExplorerBar1.get_ItemFromPoint(e.x, e.y);
	if (i != null)
		MessageBox.Show(i.Caption);
}

The following VFP sample displays the caption of the group being clicked:

*** ActiveX Control Event ***
LPARAMETERS button, shift, x, y

With thisform.ExplorerBar1
    local g
    g = .GroupFromPoint(x , y)
    If !isnull(g)
		with g
	        wait window nowait .Caption
       endwith
    EndIf
EndWith

The following VFP sample displays the caption of the item being clicked:

*** ActiveX Control Event ***
LPARAMETERS button, shift, x, y

With thisform.ExplorerBar1
    local i
    i = .ItemFromPoint(x , y)
    If !isnull(i)
		with i
	        wait window nowait .Caption
       endwith
    EndIf
EndWith