Other commonly used properties of an option button are the caption property, which provides the text label that appears to the right of the button, and the value property. Values for option buttons are Boolean, namely true if selected and false if not. In a control array, Visual Basic automatically sets the value property of all of the other buttons to false if one has a value of true. Placing the objects within a frame control will also assist you to keep track of which controls belong in a particular control array and which ones don t. The change event is rather straightforward, in that it happens exactly as its name implies.
Some event occurs when the particular circumstances for a control change.
This may happen with the click of a scroll bar or when you change the contents of a text box. The main thing to remember is that the change event happens whether or not there is code for that event. A constant is the opposite of a variable. A variable has a value that changes depending upon the input into the program. A constant is where the user or programmer sets a fixed value for something.