Quote:
Hello, if I have a position (x, y) in an image, that is inside a picturebox,
how can I know the same position if i change the size of the image?
It is really simple maths.
First solution: get a real picture, spot a particular point measure its position in picture, make a copy with a change of size, and measure new position.
Compare old size and new size, old position and new position, find the maths.
Second solution: your problem and the maths are the same as:
you are a cashier and you earn 3 cents for every dollar you bill.
How much do you earn if you bill $10, $50, $100 ...