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Run-Time Behavior for InstallScript MSI Installations

InstallShield 12

For InstallShield 12 Projects

The following steps outline the run-time behavior for InstallScript MSI installations:

  1. Setup.exe initializes ISSetup.dll.
  2. ISSetup.dll does the following:
    1. Loads Setup.inx.
    2. Executes pre-installation InstallScript events (for example, OnBegin).
    3. Launches Windows Installer (with the external user interface).
    4. Each InstallShield custom action execute as follows (for example, OnMoved). (Note that this essentially the same mechanism that is used in Basic MSI with InstallScript custom actions.)
      1. Windows Installer calls the relevant entry point in ISSetup.dll. (This is a different instance of ISSetup.dll, loaded from the Binary table.)
      2. ISSetup.dll extracts its Setup.inx resource to a temporary location.
      3. ISSetup.dll executes relevant script code.
      4. Executes post-installation InstallScript events (for example, OnEnd).

The run-time behavior for InstallShield 12 InstallScript MSI projects is much different than the behavior for InstallShield 11.5 and earlier because of some architecture enhancements. For more information about the enhancements, see Upgrading Projects from InstallShield 11.5 or Earlier.

For InstallShield 11.5 and Earlier Projects

For InstallScript MSI installations created with InstallShield 11.5 and earlier, the run-time behavior is as follows:

  1. Setup.exe installs ISScript.msi.
  2. Setup.exe launches IDriver.exe.
  3. IDriver.exe does the following:
    1. Loads Setup.inx.
    2. Executes pre-installation InstallScript events (for example, OnBegin).
    3. Launches Windows Installer (with the external user interface).

      4. Each InstallShield custom action executes as follows (for example, OnMoved). (Note that this is the same mechanism used in Basic MSI installations with custom actions.)

      1. Windows Installer calls the relevant entry point in ISScriptBridge.dll.
      2. ISScriptBridge.dll finds the running IDriver.exe instance using the running object table (ROT).
      3. IDriver.exe executes relevant script code.
    4. Executes post-installation InstallScript events (for example, OnEnd).

See Also

Overview of ISSetup.dll



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