This function will take the source string and replace every occurrance of an enviroment variable with the value of that variable.
Well known environment variables include:
| Variable | Contents |
|---|
| %SystemRoot% | Windows directory | | %SystemDirectory% | Windows system32 directory | | %temp% or %tmp% | The systems temporary directory | | %number_of_processors% | The number of cores (hyperthreading doubles the count) | | %username% | The username used to log in |
There are many others available - check windows online documentation for details. |
