using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;

namespace JD.WinFormExtensions
{
    public static class ProgressBarExtensions
    {
        const int WM_USER = 0x400;
        const int PBM_SETSTATE = WM_USER + 16;
        const int PBM_GETSTATE = WM_USER + 17;

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)]
        static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);

        public static ProgressBarState GetState(this ProgressBar progressBar)
        {
            return (ProgressBarState)SendMessage(progressBar.Handle, PBM_GETSTATE, IntPtr.Zero, IntPtr.Zero).ToInt64();
        }

        public static void SetState(this ProgressBar progressBar, ProgressBarState state)
        {
            SendMessage(progressBar.Handle, PBM_SETSTATE, (IntPtr)state, IntPtr.Zero);
        }  
    }
}