Allows you to get a list of all available drives (local and mapped) on the current machine.
First available in version 3.0 build 2039.
result - Comma-delimted list of valid drive letters.
When this method is called synchronously, a return object containing the output parameters is returned to the caller immediately.
Each drive returned includes the colon (":") character. e.g. "A:,C:,D:"
var return_obj = ssCore.FileSys.driveList();