' This event handler is invoked when 
' the "Apply Renderers" button is clicked.
' Depending on the value selected in a ComboBox 
' control, it applies a custom renderer selectively
' to individual MenuStrip or ToolStrip controls,
' or it applies a custom renderer to the 
' application as a whole.
Sub applyButton_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim ms As ToolStrip = ToolStripManager.FindToolStrip("MenuStrip")
    Dim ts As ToolStrip = ToolStripManager.FindToolStrip("ToolStrip")

    If targetComboBox.SelectedItem IsNot Nothing Then

        Select Case targetComboBox.SelectedItem.ToString()
            Case "Reset"
                ms.RenderMode = ToolStripRenderMode.ManagerRenderMode
                ts.RenderMode = ToolStripRenderMode.ManagerRenderMode

                ' Set the default RenderMode to Professional.
                ToolStripManager.RenderMode = ToolStripManagerRenderMode.Professional

                Exit Select

            Case "All"
                ms.RenderMode = ToolStripRenderMode.ManagerRenderMode
                ts.RenderMode = ToolStripRenderMode.ManagerRenderMode

                ' Assign the custom renderer at the application level.
                ToolStripManager.Renderer = New CustomProfessionalRenderer()

                Exit Select

            Case "MenuStrip"
                ' Assign the custom renderer to the MenuStrip control only.
                ms.Renderer = New CustomProfessionalRenderer()

                Exit Select

            Case "ToolStrip"
                ' Assign the custom renderer to the ToolStrip control only.
                ts.Renderer = New CustomProfessionalRenderer()

                Exit Select
        End Select

    End If
End Sub