LBN_SETFOCUS  144MSE 

An application sends the LBN_SETFOCUS notification message when a list box receives the keyboard focus. The parent window of the list box receives this notification message through the WM_COMMAND message.

LBN_SETFOCUS

idListBox = (int) LOWORD(wParam);  // identifier of list box

hwndListBox = (HWND) lParam;       // handle of list box

See Also