Have you had experience creating custom user interfaces using C++?

Yes, experience in creating user interfaces with C++ is usually associated with using libraries such as Qt, wxWidgets, or MFC.

For example, with Qt, you can create cross-platform GUI applications using signals and slots for event handling.

An example of a simple window with a button in Qt:

#include <QApplication>
#include <QPushButton>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    QPushButton button("Click me");
    button.resize(200, 60);
    button.show();
    return app.exec();
}

This approach allows creating complex interfaces with high performance and resource control.