Getting VK_SCROLL state in WinME

I have a non-window app that keeps checking Scroll lock state every second. I use GetKeyState(VK_SCROLL) in WindowsXP and it returns 1 if scroll lock is on. But in WinME, GetKeyState only works if the dialog of my app got the focus. I changed to GetAsyncKeyState but it only reports the state (pushed or released), not on/off of the toggle button.
How would I know the state (on/off) of scroll lock?
daitt
LVL 3
daittAsked:
Who is Participating?
 
cookreConnect With a Mentor Commented:
Alas, it would appear to be so.  You may also have found:

http://www.delphifaq.com/fq/q2050.shtml

part of which states:

GetKeyState and GetAsyncKeyState only work with Win95, Win98, NT4, Terminal Server and Windows 2000. But on WinME it always returns zero. These two functions are simply skipped by Millenium Edition!

Official explanation from Microsoft:

Intentionally disabled.
It didn't work all that well on some newer hardware, and worked less well with the passage of time, so it was fully disabled in ME.

0
 
cookreCommented:
Have you tried GetKeyboardState() to see if it has a similar undesirable behavior under ME?
0
 
daittAuthor Commented:
I don't have winME here to test, but yesterday I tested it and GetKeyboardState() didn't return the on/off state (as I remember it returns the same result as GetKeyState).
I don't want to use hooks because my program is very small I want it to be an alone exe file (use hook I will need a dll file).
It's hard to believe that such a simple task is impossible.
0
 
daittAuthor Commented:
Thanks for the info. Microsoft document made me crazy for a while (it doesn't mention about that anywhere in my MSDN).
Now I scan keystate of VK_SCROLL all the time and calculate the state myself. The timer interval I set tok 10ms. It works ok now :)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.