CRectTracker common classes in the use of flip coordinates will change accordingly. Select the line, the problem is even more pronounced. Use KLineTracker class can solve this problem.

LineTrackerDemo
...............\LineTrackerDemo
...............\LineTrackerDemo.sln
...............\LineTrackerDemo.suo
...............\...............\LineTracker.cpp
...............\...............\linetracker.h
...............\...............\LineTrackerDemo.aps
...............\...............\LineTrackerDemo.cpp
...............\...............\LineTrackerDemo.h
...............\...............\LineTrackerDemo.rc
...............\...............\LineTrackerDemo.vcproj
...............\...............\LineTrackerDemo.vcproj.MICROSOF-3A1B10.Administrator.user
...............\...............\LineTrackerDemoDoc.cpp
...............\...............\LineTrackerDemoDoc.h
...............\...............\LineTrackerDemoView.cpp
...............\...............\LineTrackerDemoView.h
...............\...............\MainFrm.cpp
...............\...............\MainFrm.h
...............\...............\ReadMe.txt
...............\...............\res
...............\...............\Resource.h
...............\...............\res\LineTrackerDemo.ico
...............\...............\...\LineTrackerDemo.rc2
...............\...............\...\LineTrackerDemoDoc.ico
...............\...............\...\Toolbar.bmp
...............\...............\stdafx.cpp
...............\...............\stdafx.h

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