| Value | Meaning |
| CO_MENU | container displays a system menu |
| CO_NOBORDER | container has no border |
| CO_NOCAPTION | container has no title bar |
| CO_CHILDINSIDE | container is a child of father and is included inside |
| CO_MINBOX | container has a minimize button in title bar (requires CO_MENU) |
| CO_MAXBOX | container has a maximize button in title bar (requires CO_MENU) |
| CO_SIZEBOX | container has resizable border (requires CO_MENU) |
| CO_HIDE | container is created hidden |
| CO_MINIMIZE | container is created minimized |
| CO_MAXIMIZE | container is created maximized |
| CO_DISABLE | container is created disabled |
| CO_3DBORDER | container has a 3d border |
| CO_LEAVEHOVER | container handles events corresponding to the mouse cursor entering or leaving it |
| CO_EX_LAYERED | it should not be used. |
| CO_TOPMOST | always on top. |
| CO_NOSCOL | remove "Scol" in title bar. |
| CO_NOCLIPCHILDREN | ... |