There are many graphics APIs for Windows. Which one is best for you depends entirely on what kind of application you are building, which you have not told us.

There are many graphics APIs for Windows. Which one is best for you depends entirely on what kind of application you are building, which you have not told us. I would not worry about Microsoft deprecating an API in "6-8 months". Microsoft has been extraordinarily diligent in maintaining old APIs; I know of new desktop application development being done in WinForms, and 20-year old 16-bit MFC applications that are still being used. If you are building an application now, choose the best API now. Do not worry about what will happen in 6-8 months, because by then there will be another new API coming. Waiting for the ultimate API means you will never start.