porting the application from one pc to another

This is beacuse some of the MFC dlls are missing in your pc where you have not installed your VS.
to correct it
open your project in VS in your soruce machine
take project settings->General->
in drop down Microsoft foundation classes
select "Use MFC in a static dll"
and build the project again and try porting.

Usually some dependencies from Microsoft are missing, as the others have written.
But instead of linking your application new with static MFC you can also install the Redistributable Package for the VC 2005.
The file is called 'vcredist_x86.exe'.
Download it from Microsoft here.
This Package installs the MFC and other DLL's that are necessary to run your application on other computers than the developing machine.

The other way is to search all the DLL's needed by your application. Usually they are in the VC2005\VC\redist\x86 directory.
Put these DLL's to the same directory where your application is started from.

All the answers are more than correct and all of them deserve a 5.

I'm only adding explanations on how to deploy applications made in VC8.0 and some concepts on dependencies in this link[^].

hope this helps. :thumbsup: