Collapses the current pane in a forward direction and occupies its space by maximizing the previous adjacent pane.
true, if the current pane has been collapsed successfully; otherwise, false.
Use the CollapseForward method to collapse the current pane in a forward direction: from left to right for vertical panes, and from top to bottom for horizontal panes. Note, if the right-to-left feature is enabled for the control, the horizontal pane direction is reversed.
This method is not in effect for the first pane within a SplitterPaneCollection.