This interface is implemented by the Tarma Setup.exe installer; it allows extension DLLs access to the installer's runtime engine. A pointer to the object implementing this interface is passed to the extension DLL's TixHandler entry point and to all custom DLL functions.
The interface mechanism is similar to a COM interface, but it does not use COM. It is entirely implemented within Tarma Setup and does not require any COM initialization. However, its terminology is deliberately chosen to mirror COM programming practices in order to flatten the learning curve for developers.
The interface defines the following methods, in alphabetical order.
| Name | Description |
|---|---|
| CheckFileDelete | Checks if the passed-in file will be deleted during the session. |
| FailInstall | Requests the installer to fail the installation. |
| FailInstallEx | Requests the installer to fail the installation. Identical to FailInstall in the current version. |
| GetFileInstallStatus | Returns the installation status of the passed-in file. |
| GetInternalFlags | Returns a number of internal installer flags. |
| GetSessionStatus | Returns the internal session status. |
| GetUILangID | Returns the language ID of the user interface/installation language. |
| GetUserLangID | Returns the language ID of the current user's locale. |
| GetVersion | Returns the installer's internal version number. |
| GetVersionString | Looks up a VERSIONINFO string from the extension DLL. |
| GetWindow | Returns a handle to the installer's main window. |
| IsAdministrator | Returns nonzero if running with Administrator privileges. |
| IsNT | Returns nonzero if running on a Windows NT-based platform. |
| IsSilentInstall | Returns nonzero if running as a quiet install (or removal). |
| LogMessage | Writes a message to the installer's log file. |
| ResolveSymbols | Resolves an expression containing symbolic references. |
| SetPostBootRegistration | Sets or clears the internal "post-boot registration" flag. |
| SetReboot | Sets or clears the internal reboot flag. |
| SetSymbol | Sets a symbolic variable. |
| UpdateFeatures | Requests the installer to update its feature and component bookkeeping. |