By default, the HideOnLimit property is True, which indicates that the splitting objects are hidden when split bar's position is Min or Max. The Min property indicates leftmost/topmost position the split bar can be moved. The Max property indicates rightmost/bottommost position the split bar can be moved. The LimitLT property specifies the expression that determines the limit to drag the splitter to left/top side of its container. The LimitRB property specifies the expression that determines the limit to drag the splitter to right/bottom side of its container. The control fires the Show event when an object requires to be shown or hidden.

The /COM version may use one of the following to show / hide the object:

• using the Visible property of the extended control. The ExtendedVisible property specifies a list of property names separated by comma character, that indicates the Visible property of the extended control. The Visible property of an extended control shows or hides object. By default, the ExtendedVisible property is "Visible".
• using the ShowWindow API, if the handle of the window can be detected using the IOleWindow::GetWindow, from obj parameter ( VC++ environment )
• using the ShowWindow API, if the obj refers to a handle of the window ( Delphi enviroment )

The /NET version shows or hides the objects:

• using the Visible property of the Control object (System.Windows.Forms)