BOOL WINAPI FlashWindowEx(
　　__in PFLASHWINFO pfwi
);

/// <summary>
/// 闪烁窗口
/// </summary>
/// <param name="pwfi">窗口闪烁信息结构</param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern bool FlashWindowEx(ref FLASHWINFO pwfi);

/// <summary>
/// 闪烁类型
/// </summary>
public enum flashType : uint
{
  FLASHW_STOP = 0, //停止闪烁
  FALSHW_CAPTION = 1, //只闪烁标题
  FLASHW_TRAY = 2, //只闪烁任务栏
  FLASHW_ALL = 3, //标题和任务栏同时闪烁
  FLASHW_PARAM1 = 4,
  FLASHW_PARAM2 = 12,
  FLASHW_TIMER = FLASHW_TRAY | FLASHW_PARAM1, //无条件闪烁任务栏直到发送停止标志或者窗口被激活，如果未激活，停止时高亮
  FLASHW_TIMERNOFG = FLASHW_TRAY | FLASHW_PARAM2 //未激活时闪烁任务栏直到发送停止标志或者窗体被激活，停止后高亮
}

/// <summary>
/// 包含系统应在指定时间内闪烁窗口次数和闪烁状态的信息
/// </summary>
public struct FLASHWINFO
{
  /// <summary>
  /// 结构大小
  /// </summary>
  public uint cbSize;
  /// <summary>
  /// 要闪烁或停止的窗口句柄
  /// </summary>
  public IntPtr hwnd;
  /// <summary>
  /// 闪烁的类型
  /// </summary>
  public uint dwFlags;
  /// <summary>
  /// 闪烁窗口的次数
  /// </summary>
  public uint uCount;
  /// <summary>
  /// 窗口闪烁的频度，毫秒为单位；若该值为0，则为默认图标的闪烁频度
  /// </summary>
  public uint dwTimeout;
}

/// <summary>
/// 闪烁窗口
/// </summary>
/// <param name="hWnd">窗口句柄</param>
/// <param name="type">闪烁类型</param>
/// <returns></returns>
public static bool FlashWindowEx(IntPtr hWnd, flashType type)
{
  FLASHWINFO fInfo = new FLASHWINFO();
  fInfo.cbSize = Convert.ToUInt32(Marshal.SizeOf(fInfo));
  fInfo.hwnd = hWnd;//要闪烁的窗口的句柄，该窗口可以是打开的或最小化的
  fInfo.dwFlags = (uint)type;//闪烁的类型
  fInfo.uCount = UInt32.MaxValue;//闪烁窗口的次数
  fInfo.dwTimeout = 0; //窗口闪烁的频度，毫秒为单位；若该值为0，则为默认图标的闪烁频度
  return FlashWindowEx(ref fInfo);
}