The following functions related to the Welcome Screen feature are for internal use only. Available in 3ds Max 2015 and higher.
<integer>WelcomeScreenLastTabShown()
Returns the last tab shown by the Welcome Screen. Result is 0-based.
<bool>WelcomeScreenShowAtStartup()
Returns True if the Welcome Screen is set to be shown on 3ds Max startup, False otherwise.
<bool>WelcomeScreenLaunchCount()