private static bool Filter(int hwnd, int lparam, out ApplicationWindow window)
{
window = null;
var iHwnd = new IntPtr(hwnd);
var 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 ApplicationWindow FindWindowByCaption(string caption)
{
ApplicationWindow window = null;
var ewp = new User32.EnumWindowsProc((hwnd, lparam) =>
{
var w = ApplicationWindows.GetApplicationWindow(hwnd, lparam);
if (w != null && w.Title.Equals(caption, StringComparison.InvariantCulture))
{
window = w;
}
return(window == null); //continue as long as window == null;
});
User32.EnumWindows(ewp, 0);
return(window);
}
private static IEnumerable <ApplicationWindow> FindAltTabableWindows()
{
var windows = new List <ApplicationWindow>();
var ewp = new User32.EnumWindowsProc((hwnd, lparam) =>
{
ApplicationWindow window = null;
var shouldContinue = ApplicationWindows.Filter(hwnd, lparam, out window);
if (window != null)
{
windows.Add(window);
}
return(shouldContinue);
});
User32.EnumWindows(ewp, 0);
return(windows.DistinctBy(w => w.hWnd));
}