Force Process
ForceProcess is a sandbox setting in Sandboxie Ini that automatically starts matching programs in a particular sandbox. For example:
[DefaultBox]
ForceProcess=iexplore.exe
ForceProcess=firefox.exe
[MailBox]
ForceProcess=outlook.exe
ForceProcess=cl?cke?.exe
The first two entries force Internet Explorer and Firefox into DefaultBox. The other entries force Outlook and executable names such as clicker.exe or clicked.exe into MailBox.
An entry without * is matched case-insensitively against the executable name and may use ? to match one character. In the current runtime, an entry containing * is instead matched as a case-insensitive pattern against the full normalized executable path. A name-only pattern such as App*.exe therefore does not have the same semantics as the older name-only matching; exact executable names are preferable when they are sufficient.
ForceProcess applies only when a program starts outside a sandbox. It is not reapplied when a program is explicitly started in a sandbox or is launched by an already sandboxed program.
Immersive applications
By default, after a normal ForceProcess or ForceFolder rule selects a sandbox, Sandboxie discards that selection if it identifies the resulting process as an immersive/AppContainer application. The global setting below enables these force rules for such processes:
AllowForceImmersive defaults to n, is not a per-sandbox setting, and has no dedicated SandMan control. Enabling it does not guarantee compatibility with every AppContainer, UWP, or other immersive application. See Force Folder for the resulting launch behavior and limitations.
Rule order
Sandboxie checks the executable's directory against ForceFolder before checking ForceProcess. Working-directory and document-argument ForceFolder checks occur later, after ForceProcess, so ForceFolder does not have unconditional precedence in every case.
User interfaces
In SandMan, open Sandbox Options > Program Control > Force Programs and use Force Program to maintain the list. The same page also provides Force Children, Force Folder, Remove, and Show Templates controls.
Sandboxie Control Classic provides the related Sandbox Settings > Program Start > Forced Programs page.
Version history
AllowForceImmersive was added in Sandboxie Plus 1.16.0 / Classic 5.71.0. ForceProcess predates the current version metadata and has no introduction version recorded there.