AutoFlowchart is a excellent source code flowcharting tool to generate flowchart from source code. Its flowchart can expand and shrink. and you can pre-define the the width , height,Horizontal spacing and vertical spacing. Move and zoom is also very easy. It can export the flowchart as a Microsoft Visio,Word file or a bitmap file. It can help programmers understand, document and visualize source code. It supports C,C++,VC++(Visual C++ .NET),Delphi(Object Pascal). Maybe it can help you!