# C/C++ Project Properties, Environment

Use the Environment property page to customize the build environment for all projects in the workspace; it lets you control the environment variables used by the build.

Environment preference options
Group | Description
--- | ---
Configuration | Click here for a description.
Manage Configurations... | Click here for a description.
Environment variables to set | Shows the current list of environment variables and their corresponding value. These are the environment variable values used when building.
Variable | Specifies the name of the environment variable.
Value | Specifies the value of the environment variable.
Append variables to native environment | Appends the variables to the native environment during its execution.
Replace native environment with specified one | Replaces the native environment with the specified variables, and then restores the native environment upon its completion.

Add...

Opens the New variable dialog to create a new environment variable and value. Custom environment variables that you create appear in bold within the list.

Click Variables to Select variables by name to include in the value. Select Add to all configurations to make this new environment variable available to all configurations for the selected project; otherwise, the variable is only available for the currently selected configuration.

Select... | Opens the Select variables dialog where you can choose from a list of system variables.
Edit... | Modifies the name and value of the selected environment variable.
Remove | Removes the selected environment variables from the list.
Undefine | Undefines the currently selected variable; however, some variables, such as the PATH variable, cannot be undefined.

- Project Properties, Resource page
- Project Properties, common C/C++ Configurations handling
  - Manage Configurations dialog
  - Create Configuration dialog
  - Rename Configuration dialog
- Project Properties, C/C++ General category
  - Documentation page
  - Export Settings page
  - File Types page
  - Indexer page
  - Language Mapping page
  - C/C++ Project Properties, Project References page
  - C/C++ Project Properties, Run/Debug Settings page