StartService is a sandbox setting in Sandboxie Ini. It allows to run a service program in the sandbox. This setting expects a service name (identifier), which is defined outside the sandbox. For example:
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[DefaultBox]
StartService=Adguard Service
The example specifies that the service name Adguard Service will be forced to run sandboxed in the sandbox DefaultBox.
Technical Details
StartService is processed by SandboxieRpcSs, which runs just once in every sandbox. Like the AutoExec setting, it is processed when the first program begins to run in a sandbox.
For applications, see StartProgram.