/// <summary>
/// This method sends a message to the specified window in order to
/// cause the specified bridge to unsubclass the window. This is
/// important if a different thread than the thread that owns the
/// window wants to initiate the unsubclassing. The HwndSubclass
/// object must be identified by the value returned from Attach().
/// </summary>
/// <param name="hwnd">
/// The window to unsubclass.
/// </param>
/// <param name="subclass">
/// The identifier of the subclass to unsubclass.
/// </param>
/// <param name="force">
/// Whether or not the unsubclassing should be forced. Due to the
/// way that Win32 implements window subclassing, it is not always
/// possible to safely remove a window proc from the WNDPROC chain.
/// However, the delegate will not be called again after this
/// method returns.
/// </param>
/// <returns>
/// Nothing.
/// </returns>
internal static void RequestDetach(IntPtr hwnd, IntPtr subclass, bool force)
{
if (hwnd == IntPtr.Zero)
{
throw new ArgumentNullException("hwnd");
}
if (subclass == IntPtr.Zero)
{
throw new ArgumentNullException("subclass");
}
int iForce = force ? 1 : 0;
UnsafeNativeMethods.UnsafeSendMessage(hwnd, DetachMessage, subclass, (IntPtr)iForce);
}