Windows Installer Basics: GUIDS |
A Windows Installer GUID is a unique sequence of characters, an example is "{094CDD21-7B68-4E79-8C87-7974E316F4AF}" (it must have the brackets and be in upper case). Windows Installer uses a guids as identifiers and also attempts to hide information (such as for features and components) in the registry by mangling the GUID, you can convert between the two formats with the "GUID Conversion" facility.
For situations where you want maximum control over the value you will probably use the "GUID Generation" facility to manually create one which you will copy and paste into your script.
To have your code produce GUIDs (with or without persistence) you could use the "GUID" command, also see the "GuidGet() function.
Please see these GUIDS: