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using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
public static class TaskbarProgress
{
public enum TaskbarStates
{
NoProgress = 0,
Indeterminate = 0x1,
Normal = 0x2,
Error = 0x4,
Paused = 0x8
}
[ComImportAttribute()]
[GuidAttribute("ea1afb91-9e28-4b86-90e9-9e9f8a5eefaf")]
[InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
private interface ITaskbarList3
{
// ITaskbarList
[PreserveSig]
void HrInit();
[PreserveSig]
void AddTab(IntPtr hwnd);
[PreserveSig]
void DeleteTab(IntPtr hwnd);
[PreserveSig]
void ActivateTab(IntPtr hwnd);
[PreserveSig]
void SetActiveAlt(IntPtr hwnd);
// ITaskbarList2
[PreserveSig]
void MarkFullscreenWindow(IntPtr hwnd, [MarshalAs(UnmanagedType.Bool)] bool fFullscreen);
// ITaskbarList3
[PreserveSig]
void SetProgressValue(IntPtr hwnd, UInt64 ullCompleted, UInt64 ullTotal);
[PreserveSig]
void SetProgressState(IntPtr hwnd, TaskbarStates state);
}
[GuidAttribute("56FDF344-FD6D-11d0-958A-006097C9A090")]
[ClassInterfaceAttribute(ClassInterfaceType.None)]
[ComImportAttribute()]
private class TaskbarInstance
{
}
private static bool taskbarSupported = Environment.OSVersion.Version >= new Version(6, 1);
public static void SetState(Form form, TaskbarStates taskbarState)
{
if (taskbarSupported)
{
var taskbarInstance = (ITaskbarList3)new TaskbarInstance();
taskbarInstance.SetProgressState(form.Handle, taskbarState);
}
}
public static void SetValue(Form form, double progressValue, double progressMax)
{
if (taskbarSupported)
{
var taskbarInstance = (ITaskbarList3)new TaskbarInstance();
taskbarInstance.SetProgressValue(form.Handle, (ulong)progressValue, (ulong)progressMax);
}
}
}
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