Whereas the DO WHILE loop continues executing the body of the loop as long as the comparison test is true, the DO UNTIL loop executes the loop as long as the comparison test is false.
Here is the format for the DO UNTIL loops.
Format One:
Do Until (comparison test)
Block of VB statements
Loop
Format Two:
Do
Block of VB statements
Loop Until (comparison test)
Here are two demonstrations as to how the DO UNTIL loop can be used:

