StartProgram is a sandbox setting in Sandboxie Ini. It provides an automatic start for the specified program. For example:
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[DefaultBox]
StartProgram=%ProgramFiles%\Google\Chrome\Application\chrome.exe
The example specifies that Google Chrome (chrome.exe) will be forced to run sandboxed in the sandbox DefaultBox.
Technical Details
StartProgram 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. Note that StartProgram launches the specified application in hidden mode, if supported.
For services, see StartService.