title: get handle to current active window in OpenCV
body: <p>Are there OpenCV equivalents of the GLUT glutGetWindow()/glutSetWindow() functions, which allows the current active window to be identified and switched from your own codes?</p>
  
  <p>Basically, I'd like to able to identify the current active window from a within a mouse callback function registered with all windows, and have it call another processing function with different parameters for each window.</p>
  
  <p>Any help would be appreciated.</p>