const char* cvGetWindowName(void* window_handle) {
    void *fptr;
    const char*retval;

    fptr = dlsym(_Chhighgui_handle, "cvGetWindowName_chdl");
    if(fptr == NULL) {
        fprintf(_stderr, "Error: %s(): dlsym(): %s\n", __func__,  dlerror());
        return NULL;
    }
    dlrunfun(fptr, &retval, cvGetWindowName, window_handle);
    return retval;
}
