WM_MDICASCADE
fnCascade = wParam; /* cascade flag */The WM_MDICASCADE message is sent to a multiple document interface (MDI) client window to arrange all its child windows in a cascade format.
fnCascade
Value of wParam. Specifies a cascade flag. Currently, only the following flag may be specified:
| Value | Meaning |
| MDITILE_SKIPDISABLED | Prevents disabled MDI child windows from being cascaded. |
An application should return zero if it processes this message.