wxEVT\_COMMAND\_SPLITTER\_SASH\_POS\_CHANGING events, sets the new
tracking bar position so visual feedback during dragging will
represent that change that will actually take place. Set to -1 from
wxEVT\_COMMAND\_SPLITTER\_SASH\_POS\_CHANGING events, sets the new
tracking bar position so visual feedback during dragging will
represent that change that will actually take place. Set to -1 from