# /X (Ignore Standard Include Paths)

Visual Studio 2010

Prevents the compiler from searching for include files in directories specified in the PATH and INCLUDE environment variables.

```/X
```

## Remarks

You can use this option with the /I (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 How to: Open Project Property Pages.

2. Click the C/C++ folder.

3. Click the Preprocessor property page.

4. Modify the Ignore Standard Include Path property.

## 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
```