NET, I would say it's almost not worth the considerable effort unless the vendor of the HMI software you are using has a. Given the amount of plumbing it will take to extract the data from the SCADA system you are using into. Admittedly the tools out there for SCADA development aren't the most fantastic providing you with an almost laughable toolset full of frustrating limitations. To be honest, I've yet to find good reason to move SCADA development to.