addSlider        1169 modules/highgui/src/window_QT.cpp void GuiReceiver::addSlider(QString bar_name, QString window_name, void* value, int count, void* on_change)
addSlider        1806 modules/highgui/src/window_QT.cpp void CvWindow::addSlider(CvWindow* w, QString name, int* value, int count, CvTrackbarCallback on_change)