Control used to indicate the progress of an operation. Progress consists of a rectangular block that grows during an increment and shrinks during a decrement. The control can have progress text within the bar, that provides updated information on how far the operation has progressed. The text can be displayed as either a percentage or a fraction. The bar can also have a series of invisible splits, or lines. These splits are displayed by the rectangular blocks as it fills the bar. When the control is in this mode progress text cannot be used.