David - N245KL

Hello, I've almost completed my own ACARS, I've got everything working and now, For the last part, I am coding a Fuel Utility that will (1st) Fetch the fuel from the aircraft, Then display the current amount in pounds on the ACARS. (2nd) After the pilot modifies the amount of fuel he/she would like for their flight, They press a button and it loads the fuel on the plane. I'm coding this all in Visual Basic. I've tried a couple ways but absolutely no luck at all. I've tried everywhere but no luck. Can someone provide me with some code or very helpful tips on how to do this project. It would be a miracle as I am 98% Done with this acars. Thanks guys.