/// <summary>
/// Wraps <see cref="User32Dll.GetWindowRect"/>.
/// </summary>
public static Rectangle GetWindowRect(IntPtr hwnd)
{
RECT rc;
if (User32Dll.GetWindowRect((void *)hwnd, &rc) == 0)
{
throw new Win32Exception();
}
return(rc);
}
/// <summary>
/// Wraps the <see cref="User32Dll.SetLayeredWindowAttributes"/> calls.
/// </summary>
public static bool SetLayeredWindowAttributes([NotNull] IWin32Window window, Color colorkey, double alpha, SetLayeredWindowAttributesFlags flags)
{
if (window == null)
{
throw new ArgumentNullException("window");
}
if ((alpha < 0) || (alpha > 1))
{
throw new ArgumentOutOfRangeException("alpha", alpha, "The alpha value must be in the [0…1] range.");
}
return(User32Dll.SetLayeredWindowAttributes((void *)window.Handle, unchecked ((uint)colorkey.ToArgb()), (byte)(alpha * 0xFF), (uint)flags) != 0);
}
/// <summary>
/// Invalidates the specific rectangle. If <paramref name="rect"/> is <c>Null</c>, the whole window is invalidated.
/// </summary>
public static bool InvalidateRect(IntPtr hWnd, Rectangle?rect, bool erase)
{
if (hWnd == IntPtr.Zero)
{
return(false);
}
if (rect == null) // Full area
{
return(User32Dll.InvalidateRect((void *)hWnd, null, erase ? 1 : 0) != 0);
}
RECT rc = (Rectangle)rect;
return(User32Dll.InvalidateRect((void *)hWnd, &rc, erase ? 1 : 0) != 0);
}
/// <summary>
/// The ShowWindow function sets the specified window's show state.
/// </summary>
public static bool ShowWindow(IntPtr hWnd, ShowWindowCommands nCmdShow)
{
return(User32Dll.ShowWindow((void *)hWnd, (int)nCmdShow) != 0);
}
/// <summary>
/// The SendMessage function sends the specified message to a window or windows. It calls the window procedure for the specified window and does not return until the window procedure has processed the message.
/// To send a message and return immediately, use the SendMessageCallback or SendNotifyMessage function. To post a message to a thread's message queue and return immediately, use the PostMessageW or PostThreadMessage function.
/// </summary>
public static IntPtr SendMessageW(IntPtr hWnd, WindowsMessages msg, IntPtr wParam, IntPtr lParam)
{
return(User32Dll.SendMessageW((void *)hWnd, (uint)msg, wParam, lParam));
}
/// <summary>
/// Calls <see cref="User32Dll.DestroyWindow"/>.
/// </summary>
public static bool DestroyWindow(IntPtr hwnd)
{
return(User32Dll.DestroyWindow((void *)hwnd) != 0);
}
