/// <summary>
/// Flashes the specified window. It does not change the active state of the window.
/// </summary>
/// <param name="windowHandle">A handle to the window to be flashed. The window can be either opened or minimized.</param>
/// <param name="flags">The flash status.</param>
/// <param name="count">The number of times to flash the window.</param>
/// <param name="timeout">The rate at which the window is to be flashed.</param>
public static void FlashWindowEx(IntPtr windowHandle, FlashWindowFlags flags, uint count, TimeSpan timeout)
{
// Check if the handle is valid
HandleManipulator.ValidateAsArgument(windowHandle, "windowHandle");
// Create the data structure
var flashInfo = new FlashInfo {Size = Marshal.SizeOf(typeof (FlashInfo)), Hwnd = windowHandle, Flags = flags, Count = count, Timeout = Convert.ToInt32(timeout.TotalMilliseconds)};
// Flash the window
NativeMethods.FlashWindowEx(ref flashInfo);
}
public static extern bool FlashWindowEx(ref FlashInfo pwfi);