Command-Line Error D8045

cannot compile C file 'file' with the /clr option

Remarks

Only C++ source code files can be passed to a compilation that uses /clr. Use /TP to compile a .c file as a .cpp file; see /Tc, /Tp, /TC, /TP (Specify Source File Type) for more information.

For more information, see /clr (Common Language Runtime Compilation).

D8045 can also occur if you compile an ATL application using Visual C++. See How to: Migrate to /clr for more information.