Vb windows environment variables

In this case, if we query the PATH environment variable like we did just before, the result will look like this:. As we can see, the PATH value from the user environment was appended to the value from the system environment. Only the system environment values will be available to other users logging on to the same computer, the user environment values are part of the roaming profile and hence will be different or even absent for other users. As you may already have guessed, this technique is not suited for setting environment variables.

This example uses the Environ function to supply the entry number and length of the PATH statement from the environment-string table. Have questions or feedback about Office VBA or this documentation? Please see Office VBA support and feedback for guidance about the ways you can receive support and provide feedback. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Finally, if the example created the variable, it deletes it.

The GetEnvironmentVariable String method retrieves an environment variable from the environment block of the current process only. To retrieve all environment variables along with their values, call the GetEnvironmentVariables method. Environment variable names are case-sensitive on Linux and macOS but are not case-sensitive on Windows.

All environment variables that are provided to it by the parent process that created it. For example, a.

NET application launched from a console window inherits all of the console window's environment variables. If there is no parent process, per-machine and per-user environment variables are used instead. For example, a new console window has all per-machine and per-user environment variables defined at the time it was launched. These environment variables persist until the.

NET application terminates. If environment variables are created after the process has started, you can use this method to retrieve only those variables that were created by calling the SetEnvironmentVariable String, String method or the SetEnvironmentVariable String, String, EnvironmentVariableTarget method with a target value of. On macOS and Linux, the environment block of the current process includes the following environment variables:. NET applications launched from a shell, this includes all environment variables defined in the shell.

Because the environment variable is defined in the environment block of the current process only, it does not persist after the process has ended. If variable contains a non-initial hexadecimal zero character, the characters before the zero character are considered the environment variable name and all subsequent characters are ignored. If value contains a non-initial hexadecimal zero character, the characters before the zero character are assigned to the environment variable and all subsequent characters are ignored.

If value is empty and the environment variable named by variable exists, the environment variable is deleted. If variable does not exist, no error occurs even though the operation cannot be performed. It is String. The length of variable is greater than or equal to 32, characters. The following example creates environment variables for the EnvironmentVariableTarget. Process , EnvironmentVariableTarget. User , and Machine targets, checks whether the operating system registry contains the user and machine environment variables, then deletes the environment variables.

Process successfully store an environment variable to the process environment block. The SetEnvironmentVariable String, String, EnvironmentVariableTarget method lets you define an environment variable that is available to the current process the Process value. Environment variables that are unique to the current process environment block persist only until the process ends. In addition, on Windows systems only, the SetEnvironmentVariable String, String, EnvironmentVariableTarget method lets you define an environment variable that is available to all processes that run on a machine the EnvironmentVariableTarget.