WM_COMPAREITEM top-level constant
int
const WM_COMPAREITEM
Sent to determine the relative position of a new item in the sorted list of an owner-drawn combo box or list box. Whenever the application adds a new item, the system sends this message to the owner of a combo box or list box created with the CBS_SORT or LBS_SORT style.
Implementation
const WM_COMPAREITEM = 0x0039;