Register the OutputCOMEditor.exe by running it once on your computer.

• Create an SDI application with "MFC AppWizard(exe)". Name it "LeftClick". Enable automation.
• Add the variable kaBasicClasses::DumpStreamController dsc; to the class CLeftClickApp and include the statementr #include OutputCOMEditorStream.h before definition of the class CLeftClickApp. 
• Insert the line dsc.create(); at the end of the code of the function CLeftClickApp::InitInstance();
• Enable CLeftClickApp::ExitInstance() and insert dsc.destroy(); at the beginning of the handler. 
• Attach the files OutputStream.h, OutputStream.cpp, EditorOutputStream.h, OutputCOMEditorStream.h, OutputCOMEditorStream.cpp to the project. At this point the dumpStream is fully enabled.
• Enable WM_LBUTTONDOWN and supply the following code:

  void CLeftClickView::OnLButtonDown(UINT nFlags, CPoint point) 
  {
  	dumpStream<<"OnLButtonDown:  nFlags="<<nFlags<<"  point=( "<<point.x<<" , "<<point.y<<" )"<<endl;
  	dumpStream.flush();
  	CView::OnLButtonDown(nFlags, point);
  }
      

• Build and run. You click in the client area of the LeftClick application. The output is displayed in the OutputCOMEditor window.

A note of caution has to be made about attaching files from another MFC project. Every file of MFC project has the #include "stdafx.h" statement. Each MFC project has the stdafx.h in its directory. Contents of the stdafx.h is dependent on the project. If you compile a cpp file located in a directory of another MFC project then it will certainly include the stdafx.h from another MFC project. Also, every stdafx.h file has the standard protection against repeated compilation in the same compiler pass. Such protection is based on a unique #define statement in every stdafx.h file. Therefore, you really don't have a protection against compilation of both the stdafx.h of current project and the stdafx.h of another project in the same compiler pass. These reasons may be a source of some weird diagnostics. For example, it may look like the compiler is rejecting the standard STL header files.