Img model display

I got a question but I don't really know how to ask it, hopefully I'll be able to explain it as best as I can.

So I know how to display an image/text in static window but I got 2 issues now that I want to solve.

First is how to create an image, such as a ball but that it has no background, that only a ball is visible. I know how to create something like that in PS but when I save it the background is added automaticly.

2nd question is how to display that image in a window but that window borders & background are transparent. So if we have a background image of blue color and we want to put our "ball.jpg" in the middle of it, that only the ball is visible on top of background without rect borders or anything.

An example of both would be great, or a link to the similar code.
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