How do I Compile in visual studio 10 from 6

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VisualC++

I am trying to compile the code originally written in Visual studio 6 to VS 10. I read in one of the MSDN article that 'atlmfc' has been removed from VS10. what is the alternative for atlmfc in VS10 ? error is pointing to atlchecked.h file. for example :

error C2664: 'AfxCrtErrorCheck' : cannot convert parameter 1 from 'char *' to 'errno_t' 1> There is no context in wich this conversion is possible . ....
program files (x86)\microsoft visual studio 10.0vc\atlmfc\include\atlcomcli.h(2235): error C2065: 'cVal' : undeclared identifier

ETC..

These errors are in all the header files like atlcomcli.h, oaidl.h.
part 1) I guess that whatever is included in #ifdef has not been recognized in VS10, I might need to give correct path or include relevant header file. Surprisingly no solution on the net so far. If I compare with other solution it doesnt seem to be a problem since path is correct. I am picking all the atlmfc files from visual studio 10 version.
part 2) I think code change is required but here the problem it points to is pre processor code given below.
#ifdef _AFX
#define ATLMFC_CRT_ERRORCHECK(expr) AFX_CRT_ERRORCHECK(expr)
#else #define ATLMFC_CRT_ERRORCHECK(expr) ATL_CRT_ERRORCHECK(expr)
#endif

Part 3) One of the article on the net says - http://msdn.microsoft.com/en-us/library/bb531344.aspx

"#ifdefs in the MFC header files are removed." What does that mean ? if that is removed any alternative for that in Visual studio 10 ? I do have a paid version of visual studio 10.

Also can i directly convert VS6 code to VS10 or should i convert it to VS8 first and then migrate it to VS10 ? I know some code changes will be required but Since I am not able to compile I am unable to debug and reach a place where a loop or condition is breaking. I just want my code to compile for now. I do have paid version of VS10.

Pls help.