WM_SETFOCUS message

Sent to a window after it has gained the keyboard focus.

#define WM_SETFOCUS                     0x0007

Parameters

wParam: A handle to the window that has lost the keyboard focus. This parameter can be NULL.
lParam: This parameter is not used.

An application should return zero if it processes this message.

To display a caret, an application should call the appropriate caret functions when it receives the WM_SETFOCUS message.

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Header	Winuser.h (include Windows.h)