Overview
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Windows NT
Yes
Win95
Yes
Win32s
Yes
Import Library
-
Header File
winuser.h
Unicode
No
Platform Notes
None

NMHDR

The NMHDR structure contains information about a notification message. The pointer to this structure is specified as the lParam member of the WM_NOTIFY message.

typedef struct tagNMHDR {

HWND hwndFrom;

UINT idFrom;

UINT code;

} NMHDR;

Members

hwndFrom

Window handle of control sending message

idFrom

Identifier of control sending message

code

Specifies the notification code. This member can be a control-specific notification code, or it can be one of the following common notification values:

Value
Meaning
NM_CLICK
The user has clicked the left mouse button within the control.
NM_DBLCLK
The user has double-clicked the left mouse button within the control.
NM_KILLFOCUS
The control has lost the input focus.
NM_OUTOFMEMORY
The control could not complete an operation because there was not enough memory available.
NM_RCLICK
The user has clicked the right mouse button within the control.
NM_RDBLCLK
The user has double-clicked the right mouse button within the control.
NM_RETURN
The control has the input focus, and the user has pressed the ENTER key.
NM_SETFOCUS
The control has received the input focus.

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