Setting and Reading Control Values

To manage complex dialog boxes or windows with many child-window controls, you might create a derived class to store and retrieve the state of the dialog box or window controls.

The state of a control includes the text of an edit control, the position of a scroll bar, and whether a radio button is checked.

As an alternative to creating a derived class, you can use a structure to represent the state of the dialog box's or window's controls. This structure is called a transfer buffer and is described in Using TransferBuffers."