The WM_ENTERIDLE message is sent to the owner window of a modal dialog box or menu that is entering an idle state. A modal dialog box or menu enters an idle state when no messages are waiting in its queue after it has processed one or more previous messages.
WM_ENTERIDLE
fuSource = wParam; // idle-source flag
hwnd = (HWND) lParam; // handle of dialog box or owner window
Parameters
fuSource
Value of wParam. Specifies whether the message is the result of a dialog box or a menu being displayed. This parameter can be one of the following values:
| Value | Meaning |
| MSGF_DIALOGBOX | The system is idle because a dialog box is displayed. |
| MSGF_MENU | The system is idle because a menu is displayed. |
hwnd
Value of lParam. Contains the handle of the dialog box (if fuSource is MSGF_DIALOGBOX) or of the window containing the displayed menu (if fuSource is MSGF_MENU).
Return Values
An application should return zero if it processes this message.
Remarks
The DefWindowProc function returns zero.
See Also