title: Take screenshot of multiple desktops of all visible applications and forms
body: <p>I'm working with a system that has 4 outputs (monitors) with e.g. 1280x1024 pixels for each output. I need a screenshot of the whole desktop and all open applications on it.</p>
  
  <p>I tried <a href="https://msdn.microsoft.com/en-US/library/windows/desktop/ms633504(v=vs.85).aspx" rel="noreferrer"><code>GetDesktopWindow()</code> (MSDN)</a> but it doesn't work properly. Some forms don't shown on the captured picture.</p>