loosing mouse clicks on XP but not on NT

[markus kossmann]

We have an application written with Labwindows CVI6 and originally running fine under NT.  When there is high load on the system clicking on a button may have a delayed reaction, but finally it will work. But when running that application under the same conditions under XP, there is no reaction to the click, but a message "Keine Rückmeldung" ( Translated:No response) will appear in the title bar. But the application seems still be working. How to fix that problem ?    

[MJF]

I don't know if you can fix that problem as it is a Windows OS thing that is happening. XP is a bit more stringent about how it passes messages to an application and does a much more thorough job of keeping track of which applications are "listening" and which have not responded to the windows message being put in the queue within a given time period than NT did.

The only thing I can think of is to use the SetSleepPolicy() function and set it to VAL_SLEEP_MORE and to throw in some ProcessSystemEvents() calls into any code that takes a long time to execute. This MAY help with the windows message queue response but without trying it, I cannot tell you if it will help.