/FI (Name Forced Include File)

Causes the preprocessor to process the specified header file.


/FI[ ]pathname


This option has the same effect as specifying the file with double quotation marks in an #include directive on the first line of every source file specified on the command line, in the CL environment variable, or in a command file. If you use multiple /FI options, files are included in the order they are processed by CL.

To set this compiler option in the Visual Studio development environment

  1. Open the project's Property Pages dialog box. For details, see Set C++ compiler and build properties in Visual Studio.

  2. Select the Configuration Properties > C/C++ > Advanced property page.

  3. Modify the Forced Include File property.

To set this compiler option programmatically

See also

Output-File (/F) Options
MSVC Compiler Options
MSVC Compiler Command-Line Syntax
Specifying the Pathname