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Indicates that the user pressed the F1 key. If a menu is active when F1 is pressed, WM_HELP is sent to the window associated with the menu; otherwise, WM_HELP is sent to the window that has the keyboard focus. If no window has the keyboard focus, WM_HELP is sent to the currently active window.
Parameters
-
wParam
-
Must be zero.
-
lphi
-
The address of a HELPINFO structure that contains information about the menu item, control, dialog box, or window for which Help is requested.
Return value
Returns TRUE.
Remarks
The DefWindowProc function passes WM_HELP to the parent window of a child window or to the owner of a top-level window.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client |
Windows XP [desktop apps only] |
| Minimum supported server |
Windows 2000 Server [desktop apps only] |
| Header |
|