cvSetTrackbarPos  167 modules/highgui/include/opencv2/highgui/highgui_c.h CVAPI(void) cvSetTrackbarPos( const char* trackbar_name, const char* window_name, int pos );
cvSetTrackbarPos  206 modules/highgui/src/window.cpp     cvSetTrackbarPos(trackbarName.c_str(), winName.c_str(), value );