timer 100, tick
    wait

sub tick
    print "Tick"
end sub 

    a = 1
    b = 2
    !SWAP a,b
    print a,b 

    a = -3.14159
    b = 0
    c = +3.14159
    !a = SGN(a)
    !b = SGN(b)
    !c = SGN(c)
    print a,b,c 

But my point remains: even something as serious as the TIMER bug - which really impacts on programs, especially because of label scope issues - is unchanged. This program locks up LB 4.5.0 (try moving the IDE window):

 

    UpperLeftX = 1
    UpperLeftY = 1
    button #w, "Click me and view the mainwin", tick, UL, 20, 100
    open "Event bug" for window as #w
    wait
    print "Fell through a WAIT statement: should never happen!!"

[ticktacktoock]
    print "ticktacktoock"
    wait
    print "Fell through a WAIT statement: should never happen!!"

[secondTick]
    print "secondTick"
    wait
    print "Fell through a WAIT statement: should never happen!!" 

'include lb45func.bas 

' LB 4.5.0 function library for LB Booster
' by Richard Russell, http://lbbooster.com

function after$(source$, match$)
i = instr(source$, match$)
if i then after$ = mid$(source$,i+len(match$))
end function

function afterlast$(source$, match$)
do : i = j
  j = instr(source$, match$, j+1)
loop until j = 0
if i then afterlast$ = mid$(source$,i+len(match$))
end function

function endswith(source$, match$)
endswith = right$(source$,len(match$)) = match$
end function

function remchar$(source$, charset$)
for i = 1 to len(charset$)
  do
    j = instr(source$, mid$(charset$,i,1))
    if j then source$ = left$(source$,j-1);mid$(source$,j+1)
  loop until j = 0
next
remchar$ = source$
end function

function replstr$(source$, old$, new$)
do
  i = instr(source$, old$, i+1)
  if i then
    source$ = left$(source$,i-1);new$;mid$(source$,i+len(old$))
    i = i + len(new$) - 1
  end if
loop until i = 0
replstr$ = source$
end function

function upto$(source$, match$)
i = instr(source$, match$)
if i then upto$=left$(source$,i-1) else upto$=source$
end function

function httpget$(url$)
open "WININET.DLL" for dll as #net
calldll #net, "InternetOpenA", "LB Booster" as ptr, 0 as long, _
  0 as long, 0 as long, 0 as long, hnet as ulong
calldll #net, "InternetOpenUrlA", hnet as ulong, url$ as ptr, _
  "" as ptr, 0 as long, 0 as long, 0 as long, hurl as ulong
buffer$ = space$(1000)
struct httpget, nread as long
do
  buflen = len(buffer$)
  calldll #net, "InternetReadFile", hurl as ulong, _
buffer$ as ptr, buflen as long, httpget as struct, res as long
  httpget$ = httpget$ + left$(buffer$, httpget.nread.struct)
loop until httpget.nread.struct = 0
calldll #net, "InternetCloseHandle", hurl as ulong, res as long
calldll #net, "InternetCloseHandle", hnet as ulong, res as long
close #net
end function