Create a simple vb.net application to retrieve data from bitstamp and bittrex

I need the code of a simple application in vb.net (desktop form) to retrieve data from bitstamp and bittrex. The application contains: - textbox to select pair (BTCEUR, LTCEUR, XRPEUR for bitstamp and XRPLTC for bittrex) - drop down menu to select timeframe: 15 minutes, 30 minutes, 2 hours - button to start -datagridview that contais the data downloaded At each timeframe (eg each 15 minutes) the application should request data and retrieve last price, higher price and lower price within the 15 minutes. The data have to be added in the gridview and then stored in a txt file (csv) Attention: data should be downloded going forward (now ahead) not historical data. You can see the image attached. I am paing for the source code, not the application itself even because it will be a simple start for other projects.