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The GetEnvVar method can be used to read environment variable that are available in the computer system.
Exhibit 15.1. IDL Definition of method to reading environment variables
HRESULT GetEnvVar ([in] BSTR b_envvarname, [out, retval] BSTR *b_envvarvalue);
Exhibit 15.2. Example usage of method to reading environment variables (VBScript)
Dim pval pval = app.GetEnvVar "PATH"