Sent when the user scrolls the ImageList Controls contents using the vertical scrollbar.
idCtrl = (L_INT) LOWORD(wParam) identifier of control
wNotifyCode = HIWORD(wParam) notification code
hWndCtrl = (HWND) lParam handle of the control
Sent when the user scrolls the ImageList Controls contents using the vertical scrollbar.
The parent window of the control receives this notification message through the WM_COMMAND message.
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