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I would start using C++ and develop commercials application with GUI. I found Qt libraries and seem that are good for my software.
I saw that Qt has LGPL license, I read that the license allow the developer to create an application and release it with different license, but I don’t understand if at the moment I can develop a commercial C++ windows application (closed source) with Qt WITHOUT pay for the Commercial license.
Could someone clarify this point?
Thank you!
The LGPL licence means you can use Qt in a commercial application if, and only if, you dynamically link to it. That means using a DLL (or equivalent for your platform) rather than a static library. As long as you do this you can apply whatever licence you like to your actual application.
Look at the Wikipedia article for more information on the LGPL.