title: python win32 simulate click
body: <p>Let's say I've got a window for which I want to simulate a mouse click
  at a specific x, y coordinate. I already have the hwnd but I'm not sure
  how to construct the lParam. I've used SendMessage in the past to click
  on buttons, etc., but I knew their hwnds.
  Any help would be greatly appreciated. I also can't help but wonder if
  I'm going about this the right way. My end goal is clicking on a certain
  user on skype main window (for example). I used EnumChildWindows
  to find all the main window's children, but couldn't find the right one. So
  figured I would try to 'click' on it using coordinates.</p>