I think you don't need such a long delay to reduce the cpu usage to 10%. How much does the CPU use when your app is not running?
I'd suggest to use a loop that will check for mouseposition
every 5 or so millisecs. This will let windows use most of the cpu time, but limit the lag with your hover effect.
Make sure not to update graphics and Flip etc. when there's no need for it.
You can make a test:
tt=millisecs()
for i=0 to 1000
if mousex() > 100 and mousex()<200
if mousey()>200 and mousey()<300
;
endif
endif
next
tt2=millisecs()
print tt2-tt
waitkey()
as you can see, checking the mouseposition 1000 times takes about 1 or two millisecs() on eg. a 1.6 GHz puter. So if you check it only once every 5 Millisecs, your app really won't eat a lot of CPU power. But as I said, make sure not to use any graphics update as long as there's no user action.
you may use a variable that indicates if the user is active. something like
active=0
while keydown(1)=0
mx=mousex()
my=mousey()
if (mx<>old_mx) or (my<>old_my)
old_mx=mx
old_my=my
active =300
endif
if active>0 then
active=active-1
cls
if my>buty1(0) and my<buty2(0) and mx>butx1(0) and mx<butx2(0)
butimg(0)=butimg_hi(0)
else
butimg(0)=butimg_lo(0)
endif
drawimage butx1(0),buty1(0),butimg(0)
flip
else
delay 5 ; active is zero, slumber mode
endif
wend
So in this example, after about 5 seconds of inactivity, the graphics won't be updated anymore until the mouse is moved again.
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