Feeling control variables and the associated control class object difference is not big, both can be out of the control class member function.

CodePudding user response:

Value is control, about the same,
Value is an int (the controls) was much worse

CodePudding user response:

The most significant difference is the "link"

Although this object, are objects of the same control class.
But is it related to concrete control, was completely different.
Associated to the control, is actually increase DoDataExChange function of correlation, the object can interact with the interface controls on the show. (to get input from the interface, or set the data to the screen display)

CodePudding user response:

Controls associated with variable A is B controls itself operation object, you can use to control B operate
Object and the control class C, specified in the you didn't give him a specific control, he who can operate?