LBN_SELCANCEL
idListBox = LOWORD(wParam);
hwndListBox = (HWND)lParam;
The LBN_SELCANCEL notification message is sent when the user cancels the selection in a list box. The parent window of the list box receives this notification message through a WM_COMMAND message.
idListBox
Value of low word of wParam. Specifies the list-box ID.
hwndListBox
Value of lParam. Specifies the list-box window handle.
This notification applies only to a list box that has the LBS_NOTIFY style.
LBN_DBLCLK, LBN_SELCHANGE, LB_SETCURSEL, WM_COMMAND