🚀 go-pugleaf

I have a problem with Microsoft QuickBASIC v1.0.  The problem is that
combinations of IF THEN ELSE END IF and loops of any sort won't work.  I keep
on getting different messages depending on exactly what I try - e.g.
"syntax error", "no if for else", "no next for for".

In fact, if I try typing the example on page 155 of the reference manual,
involving WHILE IF THEN EXIT WHILW ELSE END IF construction, I get an error
message saying "EXIT WHILE" is a sytax error.  And this is Microsoft's own
manual!

Am I missing something very, very simple, and is there a solution?