... drawsthe circles at their corresponding locations.Code 3C has a single class called CCode 3C. The project consists of the source filesCode 3C. cpp and Code 3C. h and a resource file called Code 3C. rc. Nine ... (menu[1].rc.PtInRect(pxClick))fMenu=1;if (menu[2].rc.PtInRect(pxClick))fMenu=2;InvalidateRect(curve.rc);}When a shaded rectangle in the window is left-clicked, pxClick stores the pixelcoordinates ... n+1. In this case n is a macro whose value is predefined inCode 3C. h. The contents in the constructor function are given as follows.CCode 3C: :CCode 3C( ){Create(NULL, "Code 3C: File menus",WSOVERLAPPEDWINDOW,CRect(0,0,600,400),NULL,MAKEINTRESOURCE(IDRMENU1));pt=new...