Different Labels if Field Contains Specific Text (VBScript)

Question

I have a NAME field for multiple assets: Tanks, Reservoirs, Pump Stations, etc. Currently, I have everything labeled using the following script:

[NAME] & vbNewLine & [Vol_Mgal] + " " + "Mgal"

I would like to include the elevation for just those that contain the word Tank. Is there a way to do this using script?

Here is my latest attempt:

Function FindLabel ([NAME], [ADDRESS])    
  if (cLng([ADDRESS]) = "TANK" then
    FindLabel = [NAME] & vbNewLine & [Vol_Mgal] + " " + "Mgal" + "," & [ELEVATION]+"ft"
 else
     FindLabel = [NAME] & vbNewLine & [Vol_Mgal] + " " + "Mgal"
 end if
End Function

Results: "Carriage returns are not allowed in simple expressions."