Different controls are different. hObject value is the value of the current object (usually the mouse point), such as a listbox has a column of options, its value is 1.2.3..., there are also some specific control value, such as radiobutton button, press value1, do not press value1. , there are some specific controls of the value, such as radiobutton button, press the value1, do not press the value0 and so on, similar to the program you see more understand, do not have to look deeper, find more programs to look at their own in the program on the good.