vb.net ditect title bar color in windows10

Question

I am trying to make a title-bar less form add form then add following code

    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.Text = ""
        Me.ControlBox = False
        Me.FormBorderStyle = FormBorderStyle.Sizable
    End Sub

but how i find title bar color for add it "upper_panel" in my form.