The NM_UPDOWN structure contains information about an up-down control notification message.
typedef struct _NM_UPDOWN { nmud NMHDR hdr; // notification message header int iPos; // current position int iDelta; // proposed change in position } NM_UPDOWNW;
The address of this structure is specified as the lParam parameter of the WM_NOTIFY message for the UDN_DELTAPOS notification message.
NMHDR, UDN_DELTAPOS, WM_NOTIFY
file: /Techref/os/win/api/win32/struc/src/str12_22.htm, 1KB, , updated: 2000/4/7 12:20, local time: 2024/10/3 13:59,
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