Preserves comments during preprocessing.
/C
Remarks
This compiler option requires the /E, /P, or /EP option.
The following code sample will display the source code comment.
// C_compiler_option.cpp
// compile with: /E /C /c
int i;   // a variable
This sample will produce the following output.
#line 1 "C_compiler_option.cpp"
int i;   // a variable
To set this compiler option in the Visual Studio development environment
- Open the project's Property Pages dialog box. For details, see How to: Open Project Property Pages. 
- Click the C/C++ folder. 
- Click the Preprocessor property page. 
- Modify the Keep Comments property. 
To set this compiler option programmatically
- See KeepComments.