function in button

[hamham]

see attachments

[RobertoBozzolo]

Ok, so you've learned how to post a project. Now you must learn how to use CVI! 

First of all, the include file associated to the UIR file must not be manually modified. This is clearly stated on top of the file itself and is a warning for your convenience: since those files are recreated from scratch when you modify and save the UIR, what you have added manually will be lost. Create a new include file instead, add it to the project and #include it in the source file.

Second, read the manuals and go through the tutorial!  You would have spent more or less the same time you have used posting here, and you'd have learnt something you will use any single time you use CVI.