LBN_ERRSPACE
idListBox = LOWORD(wParam);
hwndListBox = (HWND)lParam;
The LBN_ERRSPACE notification message is sent when a list box cannot allocate enough memory to meet a specific request. 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.
WM_COMMAND