Rule　extension　recomplile　from　x８６　DLL　to　x６４　DLL

We use MIIS for galsync.

We use custom extension DLL which is written by VisualStudio2003.

We plan to migrate from MIIS to FIM.

I use x86　windows7 and VisualStudio2010Expressx86.

VisualStudio2010Expressx86 can recompile x86 VisualStudio2003 source code to x64 platform DLL ?