Question about Quinn-Curtis Real-Time Graphics VB w/Source (WINVB202)
I use the real-time graphics Active X Control WIN-AXC-200 Version 1.0 with Visual Basic 5 and Windows NT 4.0. In my software, there is a screen with several meters and several frames. One frame is hidden at the load of the screen. When the user strikes spacebar key, this frame appears or disappears. But if we strike several times on spacebar, the software doesn't react anymore : it seems that the software doesn't receive anymore events about the keyboard. We have to click on a meter and then software works well. This software is installed on several computers but the problem occurs only on few computers. So it seems that there is a problem with the meters and the configuration of the computer. What can I do to solve this problem? Thanks.
Keyboard event are delivered to the component that has "keyboard focus". Looks like somebody is stealing focus from your active x control. It would be the best to find whom and disable it but if not the quickest hack is: 1. set timer in you application say for 100 milliseconds. 2. check if your your active x control has focus (there should be analog of GetFocus in VB). 3. if not - call something similar to Win32.SetFocus with the handle of your control. Let me know if you still have problems.
Posted on Sep 09, 2007
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