I had done a MFC project using visual studio 2010 beta. Now I have the Visual studio 6.0.. Will I be able to work on it ? Will my project be recognized properly?
No. Although MFC is quite old, it has been updated with each new release of Visual Studio. Not all the changes are to MFC classes, some changes are to the comment tokens inserted into the code to help Class Wizard.
I expect you'll have some difficulty using your project VS2010 generated project on VS6. As I recall, VS2010 project files are XML versions of .vsproj. In VS6, projects are .dsp. So even the project file format is different, another Microsoft improvement.