After 3-4 days of trying to find a free tool for constructing GUI windows windows for C++. (curb visual windows forms for example) I decided to try qt anyway, but the catch is that it like just not free . (As I understand it, you can sell programs written on it only by buying a qt license) Is this so? Can anyone explain in simple terms how the qt license works, and or suggest an alternative?

Answer 1, authority 100%

You can use Qt for your product and you don’t need to share the source code, but you do need to dynamically link to libraries that are under the LGPL.

And if you still can’t do without static linking, then you can simply distribute your object files (not source code), and everything will be fine.