private static bool Filter(int hwnd, int lparam, out ApplicationWindow window)
{
window = null;
var iHwnd = new IntPtr(hwnd);
StringBuilder title = new StringBuilder(256);
User32.GetWindowText(hwnd, title, 256);
var t = title.ToString();
//Skip if the window does not have a caption.
if (t.Length == 0)
return true;
//Skip if parent is not the desktop.
var parentHwnd = User32.GetParent(iHwnd);
if (!parentHwnd.Equals(new IntPtr(0)))
return true;
if (!User32.KeepWindowHandleInAltTabList(iHwnd))
return true;
//Skip if the window is not visible but not minimized and has SW_HIDE (0) style.
var placement = new WINDOWPLACEMENT();
User32.GetWindowPlacement(iHwnd, ref placement);
if (!User32.IsWindowVisible(hwnd) && !User32.IsIconic(iHwnd) && placement.flags == 0)
return true;
var info = new WINDOWINFO();
info.cbSize = (uint)Marshal.SizeOf(info);
User32.GetWindowInfo(iHwnd, ref info);
//skip window if it's really small (usually an indicator it's not a alt tab candidate window.
if (info.rcWindow.Width <= 10 && info.rcWindow.Height <= 10)
return true;
window = ApplicationWindows.GetApplicationWindow(hwnd, lparam);
return true;
}
public static extern bool GetWindowInfo(IntPtr hwnd, ref WINDOWINFO pwi);