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While this is simple it is a brute force approach. Users likely will not like that their user interface suddenly uses the "wrong" decimal point, since this setting changes the decimal sign for everything in the LabVIEW app. The better approach is to think about localization and make the code use explicit formats where necessary and leave the default where things are presented to users. For the legacy string functions you have the mentioned boolean input, for Scan From String and Format into String you have the %.; or %,; prefix to the format string which tells the function to use an explicit decimal sign. Basically anything that goes to the UI would use the system default (and no prefix in the format string), things that communicate with a device or anything similar will likely be done with the %.; prefix. This way the user gets to see the decimal numbers in whatever way he is used to and the communication with GPIB, TCP/IP and whatever devices will work irrespective of the local country settings.