Good Morning,

I created a .dll with Qt-creator 5.4, that is exporting some classes.
I now want to use these classes in an other Qt-Project. I managed to create an instance of the classes, but when i try to use a function (of course a public one) from one of the classes, i get an Error "undefined reference to ..."

Perhaps i make some very stupid errors, because its my first time working with a .dll

Can Anybody please help?