Data Fetch from API

Dear Friends I would like to fetch stock market data from API.I bought api membership from api provider. I have username and password. Thing I wanted ; program will connect api server over username and password. it will fetch stock market data and it will save to csv file to windows c:\ directory. program must save new data when any data changed. it must have simple gui panel, start-stop button and delay input must be on gui window. i need to write interval milisecond before i start. i will read this data with different program and i will use this data in my website. but i just want this data can be saved and location as a csv file. this is enogh for my now. I can pay 100 $ for this job. I dont have more money. I can do this software with php but api just allow c++ or c# . i think it looks like simple. i just have 1 day for this program finish. I dont have more time, fast comer gets job. I am going to give more details before we start. if you can do this job, please contact me. example screen is under attachment Thanks