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using System;
using System.Runtime.InteropServices;

namespace CustomTreeViewLabelEdit
{
  internal static class NativeMethods
  {
    // Specifying custom text when using the LabelEdit functionality of a TreeView
    // http://cyotek.com/blog/specifying-custom-text-when-using-the-labeledit-functionality-of-a-treeview

    #region Constants

    public const int TVN_FIRST = -400;

    public const int TVN_BEGINLABELEDITW = (TVN_FIRST - 59);

    public const int TVN_BEGINLABELEDIT = TVN_BEGINLABELEDITW;

    public const int TVM_GETEDITCONTROL = 0x110F;

    public const int WM_SETTEXT = 0xC;

    public const int WM_USER = 0x0400;

    public const int WM_NOTIFY = 0x004E;

    public const int WM_REFLECT = WM_USER + 0x1c00;

    #endregion

    #region Class Members

    [DllImport("USER32", EntryPoint = "SendMessage", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

    [DllImport("USER32", EntryPoint = "SendMessage", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern IntPtr SendMessage(IntPtr hWnd, int msg, IntPtr wParam, string lParam);

    #endregion

    #region Nested Types

    [StructLayout(LayoutKind.Sequential)]
    public struct NMHDR
    {
      public IntPtr hwndFrom;

      public IntPtr idFrom;

      public int code;
    }

    #endregion
  }
}