# /X (Ignore Standard Include Paths)

Visual Studio .NET 2003
```/X
```

This option prevents the compiler from searching for include files in directories specified in the PATH and INCLUDE environment variables. You can use this option with the Additional Include Directories (/Idirectory) option.

To set this compiler option in the Visual Studio development environment

1. Open the project's Property Pages dialog box. For details, see Setting Visual C++ Project Properties.
2. Click the C/C++ folder.
3. Click the Preprocessor property page.
4. Modify the Ignore Standard Include Path property.

To set this compiler option programmatically

#### Example

In the following command, `/X` tells the compiler to ignore locations specified by the PATH and INCLUDE environment variables, and `/I` specifies the directory in which to look for include files:

```CL /X /I \ALT\INCLUDE MAIN.C
```