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The program should allow the user to draw multiple polylines and polygons. At any time, the user should be able to change the current
drawing color, line thickness, and fill color (for polygons). The user should also be allowed to changethese values for existing polylines/polygons, and the user should be able to change the drawing order of the polylines/polygons (i.e., which ones are drawn on top in case of overlap). Your program should allow
the user to load and save a file (using a file format that you develop). The program should automatically keep track of whether the drawing has changed, and, if so, to prompt the user upon exit. The program must compile under Visual Studio 2010