how to check range before execution

[PKIM]

Hi all,

  I find that Labwindows allows user to choose the valid range of data for controls in the user interface. When user input anything beyond the set range, there will be a red-frame box to indicate the error range. but if I intentionally input something beyond the range and some code (which will read the number input from that control), I found that the program will run also. So, range validation doesn't really stop the execution of the code. Is that any way to raise an error so to stop the execution of the code if there is any data with invalid range? Thanks.

[RobertoBozzolo]

None that I know of 

You have two alternatives:

- set controls with Range checking = Coerce

- issue a ValidatePanel before processing user input and stop if return value = 0

[Wolfgang]

In your callback you can check for EVENT_VAL_COERCED

[PKIM]

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@Wolfgang wrote:

In your callback you can check for EVENT_VAL_COERCED

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Thanks. I think that's what I am looking for

[Wolfgang]

Glad to hear, good luck and post back if you succeeded.