CodeDrawer makes c++ source code to visual based diagram. You can easily understand source code's architecture by using CodeDrawer. There is several functions to show diagram. You can see the list of class, struct, union, namespace by diagram. You also can see the logic's flow diagram of function or method. And you also can see function's and method 's NSD(Nassi-Shneiderman Diagrams). Other part of a function, you can set diagram's color, font, etc..