Method of sending and receiving VC custom messages

The following is a self-created dialog class (MYMESSAGEDLG) to the View class (Messagetestview)
Send a custom message as an example of the two different methods of customizing the message

Method of message Delivery one: using On_message
Using on_message response messages, you must match the definition message #define WM_MY_MESSAGE (wm_user+100)

For those who send the message,-MYMESSAGEDLG,
In its MyMessageDlg.h, define #define WM_MY_MESSAGE (WM_USER+100)
In its MyMessageDlg.cpp to add first: #i nclude "MainFrm.h"
Because the cmainframe* definition object is used.
and a function to test the message:
void Mymessagedlg::onbuttonmsg ()
{
Todo:add your control notification handler code here
cmainframe* pmf= (cmainframe*) AfxGetApp ()->m_pmainwnd; First by getting the current frame pointer
CView * active = Pmf->getactiveview ()//To get current view class pointer
if (active!= NULL)//Gets the current view class pointer to send a message
Active->postmessage (wm_my_message,0,0); Send a message using PostMessage
}

For the recipient of the message,-messagetestview,
In its MessageTestView.h, you also define #define WM_MY_MESSAGE (WM_USER+100)
and define the message mapping function-onmymessage ()
Protected
{{afx_msg (Cmessagetestview)
afx_msg lresult OnMyMessage (WPARAM WPARAM, LPARAM LPARAM);
}}afx_msg
Declare_message_map ()
In its MessageTestView.cpp,
To declare a response message first:
Begin_message_map (Cmessagetestview, CEditView)
{{Afx_msg_map (Cmessagetestview)
On_message (Wm_my_message, OnMyMessage)
}}afx_msg_map
Add a function implementation of the message response:
Lresult Cmessagetestview::onmymessage (WPARAM WPARAM, LPARAM LPARAM)
{
MessageBox ("onmymessage!");
return 0;
}

Method of message Delivery two: using On_registered_message
Use on_registered_message Registration message, must cooperate with
Static UINT wm_my_message=registerwindowmessage ("message");

For the sender of the message,
in its MyMessageDlg.h, as long as
defines static UINT wm_my_message=registerwindowmessage ("-mymessagedlg" ); The
is OK. The
is added first in its MyMessageDlg.cpp: #i nclude "MainFrm.h"
because the cmainframe* definition object is used.
and a function to test the message:
void mymessagedlg::onbuttonmsg ()
{
//Todo:add your control notification handler code here< br> cmainframe* pmf= (cmainframe*) AfxGetApp ()->m_pmainwnd; First by getting the current frame pointer
CView * active = Pmf->getactiveview ();//To get the current view class pointer
if (active!= NULL)//Get the current view class pointer to send the message
Active->postmessage (wm_my_message,0,0); Send a message using PostMessage
}

For the recipient of the message-messagetestview,
Do not define in its MessageTestView.h
Static UINT wm_my_message=registerwindowmessage ("message");
This definition should be placed in the MessageTestView.cpp and not appear: redefinition
Just define the message mapping function in its MessageTestView.h
Protected
{{afx_msg (Cmessagetestview)
afx_msg lresult OnMyMessage (WPARAM WPARAM, LPARAM LPARAM);
}}afx_msg
Declare_message_map ()
In its MessageTestView.cpp, first define
Static UINT wm_my_message=registerwindowmessage ("message");
Then register the message:
Begin_message_map (Cmessagetestview, CEditView)
{{Afx_msg_map (Cmessagetestview)
On_registered_message (Wm_my_message,onmymessage)
}}afx_msg_map
The last function implementation to add a message response:
Lresult Cmessagetestview::onmymessage (WPARAM WPARAM, LPARAM LPARAM)
{
MessageBox ("onmymessage!");
return 0;
}
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Compare two methods, just slightly different. But be careful not to receive a message.

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Additional considerations:

Before you send a message, you also define the-mymessagedlg.cpp
Static UINT wm_my_message=registerwindowmessage ("message");

Before you accept a message, you also define the-messagetestview.cpp
Static UINT wm_my_message=registerwindowmessage ("message");

RegisterWindowMessage ("message") in the content of what is not important, write anything can, but
The sender and the recipient must be the same content, such as: "Message"

cmainframe* pmf= (cmainframe*) AfxGetApp ()->m_pmainwnd; First by getting the current frame pointer
CView * active = Pmf->getactiveview ()//To get current view class pointer
To run this error, you need to change to CMainFrame * hwd = (CMainFrame *) AfxGetMainWnd ();