LabWindows/CVI

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Not able to type into a numeric control

Hello Sarah,
 
I worked with the User Interface yesterday and the problem didn't occur. As sooon as I am able to reproduce the error I will let you know...
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Message 11 of 14
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I haven't had the time to try yet, however, we have many applications of all sizes and I've only seen it in this one.
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Message 12 of 14
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Hello all,

it's been a while since anyone has replied to this thread. I am still having the 'blocked keyboard' problem in my application. When I hit a key, the only thing that happens is that I hear the default beep sound from Windows. My application doesn't respond to the keyboard input at all. I'm afraid that this might be a Windows XP problem instead of a LabWindows problem, since the callback functions of the active control and panel are not fired at all, even not with the EVENT_KEYPRESS event.

It is nearly impossible for me to analyse where this problem is coming from, or reproduce this problem in a smaller application. My application is pretty large and the problem occurs only like 5% of the times. Sometimes the keyboard seems to be blocked from the beginning, and sometimes it's suddenly blocked at some random time when operating my program. When my application is started, several things happen before the RunUserInterface function is launched: startup files are being read, some registry values are read, the User Interface is adjusted and the serial port is opened if present... I tried to leave out some code to check if that solves the problem, but this is very hard to say since the problem doesn't occur very frequently.

Is there anyone who has an idea of what could be happening here?

 

Thanks a lot!

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Message 13 of 14
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We still have this problem and we're now at cvi version 8.0.1

I've been wondering if the keyboard interface makes any difference. Currently the system has the keyboard plugged into the PS/2 port, but we could try a USB keyboard to see if we get the same behaviour.

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Message 14 of 14
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