/Zs (Syntax Check Only)
Tells the compiler to check only the syntax of the source files on the command line.
When using this option, no output files are created, and error messages are written to standard output.
The /Zs option provides a quick way to find and correct syntax errors before you compile and link a source file.
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 Command Line property page.
Type the compiler option in the Additional Options box.
To set this compiler option programmatically