Resources, dialog boxes, controls

Excuse me, Sir, how can I get to Lewisham?

• Demonstration
• The main window:
  • in the background: London Underground Plan (the image can be downloaded here)
  • the image fits the entire client area
  • non-sizeable, non-scrollable
  • appropriate menu option opens the modal dialog
• The dialog:
  • the dialog displays the zoomed part of the map
  • the middle point of the image showed in dialog should be the same as the point behind it on the main window
  • the scrollbar on the dialog changes the zoom value (the number of the zoom values can be limited and small) 
  • the dialog can be closed with a button which lies on it; the system menu is not available on the dialog
• Technical requirements:
  • all drawing should be flicker-free
  • all created GDI objects must be deleted
  • objects selected as current on DC must not be deleted
  • the bitmap should be stored in and taken from the resources
• Hints:
  • DialogBox()
  • WM_HSCROLL, SetScrollPos(), SetScrollRange(), SB_CTL
  • LoadBitmap(), CreateCompatibleDC(), CreateCompatibleBitmap(), BitBlt(), StretchBlt()

• Approximate points:
  • displaying the map in the main window 4.0
  • dialog box functionality (with displaying the image) 4.0
  • zooming the image with the scroll bar 2.0