| SPLITCD_POS | use the spllitterPos member |
| SPLITCD_THICKNESS | use the thickness member |
| SPLITCD_STYLE | use the style member |
| SPLITCD_MINLEFT | use the minLeft member |
| SPLITCD_MINRIGHT | use the minRight member |
| SPLITCD_MINTOP | use the minTop member |
| SPLITCD_MINBOTTOM | use the minBottom member |
| SPLITCD_DIALOGUNITS | splitterPos, thickness, minLeft, minRight, minTop and minBottom values are in dialog units rather than in pixels. |
| SPLITHIDE_1 | collapse the left/top pane (if it is not yet hidden) |
| SPLITHIDE_2 | collapse the right/bottom pane (if it is not yet hidden) |
| SPLITHIDE_RESTORE | if there is any hidden pane restore it moving the splitter to the previous position |