Little VB developers noted that the text box (TextBox) control has undo properties, but this property has brought convenience to programmers. This is a fairly excellent feature that is used in many developments that need to edit text or graphics. Many programs require multi-level undo, or some programs need to be "re-operate" and cancel the last step, these cumbersome requirements require complex programming design, but a simple undo attribute of the TextBox control can be easily implemented These processes.
