#region Usings
using System;
using System.Windows.Forms;
#endregion

#region Tab Control without Header
//https://stackoverflow.com/questions/23247941/c-sharp-how-to-remove-tabcontrol-border

public partial class TabControlWithoutHeader : TabControl
{
    int layoutval = 1;

    public TabControlWithoutHeader(int layout)
    {
        SetLayout(layout);
    }
    public TabControlWithoutHeader()
    {
        SetLayout(1);
    }

    private void SetLayout(int layout)
    {
        layoutval = layout;
        if (layoutval == 1)
        {
            if (!DesignMode) Multiline = true;
        }
    }

    protected override void WndProc(ref Message m)
    {
        if (layoutval == 2)
        {
            base.WndProc(ref m);
            return;
        }

        if (m.Msg == 0x1328 && !DesignMode)
            m.Result = new IntPtr(1);
        else
            base.WndProc(ref m);
    }
}
#endregion