enum INSTALLLOGMODE  // bit flags for use with MsiEnableLog and MsiSetExternalUI

        public enum INSTALLLOGMODE  // bit flags for use with MsiEnableLog and MsiSetExternalUI

You can change user interface settings by using the MsiSetInternalUI, MsiSetExternalUI, or MsiSetExternalUIRecord functions.

public static extern InstallUIHandler MsiSetExternalUI(InstallUIHandler handler, int messageFilter, IntPtr context);

Declare Function MsiSetExternalUI Lib "msi.dll" (TODO) As TODO

    MsiSetExternalUI(new InstallUIHandler(MyInstallUIHandler), 32735, (IntPtr)0);