Send this message to be notified when an item is unselected due to the user selecting or unselecting one or more items in the ImageList Control.
idCtlr = (L_INT)LOWORD(wParam) identifier of the control.
wNotifyCode = HIWORD(wParam) will be L_ILN_ITEMUNSEL.
Pointer to an LILITEMSEL structure containing information about the unselected item.
This message is sent to the ImageList Control's window by itself when an Item is unselected by the user.
You can use this message instead of the L_ILN_ITEMUNSEL command notification when you are sub-classing the ImageList Control.
The lItem member of the LILITEMSEL structure pointed to by lParam will contain the 0-based index of the unselected item.
This sample code comes from an example that sub-classes the LEAD ImageList Control Window. This function processes the L_ILM_ITEMUNSELECTED message to be notified when an item is unselected.
LRESULT ILM_ITEMUNSELECTEDExample(HWND hCtrl, UINT msg, WPARAM wParam, LPARAM lParam)
pItem = (pLILITEMSEL)lParam;
wsprintf(szBuf, TEXT("Item %ld was unselected\n"), pItem->lIndex);
MessageBox(hCtrl, szBuf, TEXT("UnSelected"), MB_OK);
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