Capturing a Part of the Screen

• Demonstration
• An application with one window containing the following elements:
  • An area for drawing the captured part of the screen
    • Pushing the left mouse button starts capturing the screen's part
    • Red frame is drawn using the XOR operation and is moved according to the mouse's movement
    • Size of the red frame is the same as the size of the area
    • (The information text visible in the demonstration is not required.)
  • The 'Refresh' button causes re-capturing the screen's part using the last used coordinates
  • The 'Close' button closes the window and terminates the application
• Requirements:
  • No flickering
  • The window is resizable and its elements are repositioned in a 'smart' way (see the demonstration)
  • Use black colour for parts outside the screen

• Hints:
  • SetROP2(), R2_XORPEN

• Links for uploading:
  • Solutions
  • Corrections