To play a sound looping both SND_LOOP and SND_ASYNC flags have to be specified. Looped sounds only stop when PlaySound is called with pszSound set to NULL.

My.Computer.Audio.PlaySystemSound(Media.SystemSounds.Asterisk)

If the function returns True but there is no sound, check Settings / Sounds & Notifications / Enable sounds for / Programs / Notifications

    Public Class Sounds

        FEATURE_DISABLE_NAVIGATION_SOUNDS = 21,

        SM_SHOWSOUNDS = 70,

    SM_SHOWSOUNDS          = 70, // 0x46

    SM_SHOWSOUNDS       = 70

    SM_SHOWSOUNDS = 70

System.Media.SystemSounds._.Play

static extern TODO sounds(TODO);

Declare Function sounds Lib "user32.dll" (TODO) As TODO