| Name | Value | Signification |
| WS_OPEN | 0x0001 | The window is opened |
| WS_ICONIFY | 0x0002 | The window is iconified |
| WS_MENU | 0x0004 | The window owns a menu |
| WS_TOOLBAR | 0x0008 | The windpw owns a toolbar |
| WS_GROW | 0x0010 | The growbox effects are enabled |
| WS_UNTOPPABLE | 0x0020 | The window is untoppable |
| WS_FORM | 0x0040 | The window is an object formular |
| WS_FORMDUP | 0x0080 | The window is an dupicated object formular |
| WS_MODAL | 0x0100 | The window is modal |
| WS_FRAME_ROOT | 0x0200 | The window containts framed windows |
| WS_FRAME | 0x0400 | The window is a framed window |
| WS_ALLICNF | 0x0800 | The window is iconified or closed (*) |
| WS_FULLSIZE | 0x1000 | The window has full screen size |
(*) This flag is used to handle the WM_ALLICONIFY message.