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Hello I've had some issues with a laptop that is used for data acquisition. Sometimes the people unplug the power and don't plug it in again. To not loose too much data, I had to find a was for LabView to know the power source and the fill level of the battery. This vi is done with LabView 7.1 and uses a call to the windows library kernel32.dll to get the data. It should work on any windows system since Windows 2000. Maybe it is useful to other LV users as well. The second vi just calls the first one in 500ms intervals and shows the results. If you have ideas for improvement, let me know. kruemi PowerStatus.vi ShowPowerStatus.vi

It's possible but not without writing a DLL/shared library for every platform you want to support. For Windows straighforward, for MacOS X quite a bit of digging in the Carbon framework and for Linux a bit of a pain to do, since it can vary depending on kernel version, distribution and packaging. And not to forget, that it doesn't invoke a .NET monster framework to get at some low level system information that is accessed through several other layers by the .Net library.