rem: : BSlider(rect, name, NULL, NULL, 0, 0x10000000, B_HORIZONTAL, B_TRIANGLE_THUMB)
add: : BSlider(rect, name, NULL, NULL, 0, 0x10000000, B_HORIZONTAL, B_TRIANGLE_THUMB, B_FOLLOW_LEFT_RIGHT)
context: Slider::Slider(BRect rect, const char *name)	: BSlider(rect, name, NULL, NULL, 0, 0x10000000, B_HORIZONTAL, B_TRIANGLE_THUMB){}