CWnd::OnNotify, OnCommand

CWnd::OnNotify

 

virtual BOOL OnNotify(  WPARAM wParam,  LPARAM lParam,  LRESULT* pResult   );

 

Parameters

• wParam
  Identifies the control that sends the message if the message is from a control. Otherwise, wParam is 0.

• lParam
  Pointer to a notification message (NMHDR) structure that contains the notification code and additional information. For some notification messages, this parameter points to a larger structure that has the NMHDR structure as its first member.

• pResult
  Pointer to an LRESULT variable in which to store the result code if the message is handled.

Return Value

An application returns nonzero if it processes this message; otherwise 0.

Remarks

OnNotify processes the message map for control notification.

Override this member function in your derived class to handle the WM_NOTIFY message. An override will not process the message map unless the base class OnNotify is called.

For more information on the WM_NOTIFY message, see Technical Note 61 (TN061), ON_NOTIFY and WM_NOTIFY messages. You may also be interested the related topics described in Control Topics, and TN062, Message Reflection for Windows Controls.  

 

from:

 

CWnd::OnNotify

 

구조체 NMHDR , 

- OnNotify 의 인자 lParam 으로 NMHDR 포인터가 전달된다. 

typedef struct tagNMHDR {  
    HWND hwndFrom;  
    UINT idFrom;  
    UINT code;  
} NMHDR;  


//// 

 

Note that since the NMHDR member is first in this structure, the pointer you're passed in the notification message can be cast to either a pointer to an NMHDR or a pointer to an LV_KEYDOWN.

Notifications Common to All New Windows Controls

Some notifications are common to all of the new Windows controls. These notifications pass a pointer to an NMHDR structure.

TABLE 1Notification codeSent because

NM_CLICK	User clicked left mouse button in the control
NM_DBLCLK	User double-clicked left mouse button in the control
NM_RCLICK	User clicked right mouse button in the control
NM_RDBLCLK	User double-clicked right mouse button in the control
NM_RETURN	User pressed the ENTER key while control has input focus
NM_SETFOCUS	Control has been given input focus
NM_KILLFOCUS	Control has lost input focus
NM_OUTOFMEMORY	Control could not complete an operation because there was not enough memory available

from 

TN061: ON_NOTIFY and WM_NOTIFY Messages

 

 

 

 

CWnd::OnCommand

 

virtual BOOL OnCommand( WPARAM wParam, LPARAM lParam);

 

Parameters

wParam
The low-order word of wParam identifies the command ID of the menu item, control, or accelerator. The high-order word of wParam specifies the notification message if the message is from a control. If the message is from an accelerator, the high-order word is 1. If the message is from a menu, the high-order word is 0.

lParam
Identifies the control that sends the message if the message is from a control. Otherwise, lParam is 0.

Return Value

An application returns nonzero if it processes this message; otherwise 0.

Remarks

OnCommand processes the message map for control notification and ON_COMMAND entries, and calls the appropriate member function.

Override this member function in your derived class to handle the WM_COMMAND message. An override will not process the message map unless the base class OnCommand is called.

 

from:

CWnd Class

 

 

 

연관 

 

 

MFC. 컨트롤 동적 생성시 이벤트 핸들링

 

 

 

 

 

 

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첫 등록 : 2020.09.24

최종 수정 : 

단축 주소 : https://igotit.tistory.com/2624

 

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