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trbn-thumbposchanging.md

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TRBN_THUMBPOSCHANGING notification code (Commctrl.h)
Notifies that the thumb position on a trackbar is changing. This notification code is sent in the form of a WM\_NOTIFY message.
0876e026-bc07-409d-b174-b97ed704fc11
TRBN_THUMBPOSCHANGING notification code Windows Controls
apiref
TRBN_THUMBPOSCHANGING
Commctrl.h
HeaderDef
reference
05/31/2018

TRBN_THUMBPOSCHANGING notification code

Notifies that the thumb position on a trackbar is changing. This notification code is sent in the form of a WM_NOTIFY message.

TRBN_THUMBPOSCHANGING

    lpNMTrbThumbPosChanging = (NMTRBTHUMBPOSCHANGING*) lParam;

Parameters

lParam

Pointer to a NMTRBTHUMBPOSCHANGING structure. The caller is responsible for allocating this structure and setting its members, including the members of the contained NMHDR structure.

Return value

Return TRUE to prevent the thumb from moving to the specified position.

Remarks

Send this notification to clients that do not listen for WM_HSCROLL or WM_VSCROLL messages.

Requirements

Requirement Value
Minimum supported client
 Windows Vista [desktop apps only]
Minimum supported server
 Windows Server 2008 [desktop apps only]
Header
Commctrl.h