Why is my variable incrementing multiple times?

In my application I need to increment a variable when a certain condition is met so I have a case statement which checks whether the condition is true then increments a variable. However the variable is increment for the entire time that the condition is met. How can I restrict this to only increment one time per occasion of the condition being true. I've tried while and for loops that execute only one time and nothing seems to work.

Or you could do it similar to this.
Joe.
"NOTHING IS EVER EASY"
Attachments:
Try this.vi ‏26 KB

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ViStatus _VI_FUNCH IHandler(ViSession vi, ViEventType etype, ViEvent event, ViAddr uhandle)
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