ActiveDrawer is a real-time visual drawer for Visual Studio C++. It makes source code to diagrams in real-time. It is a Visual Studio addin program. It provides list view of macroscopic contents. It also provides flow-chart style diagrams and NSD(Nassi-Shneiderman Diagrams). It co-relations between user source code and Visual Studio. It supports Visual Studio C++ 5, 6, .NET, .NET 2003 and 2005. It provides quick understanding for source code.