Custom messages in VC + +

In VC + + to join the custom message, the following methods can be used for reference ...

1 define the message first: for exampledefine WM_MYMESSAGE (WM_USER+100)

2 in the. h file, add a message response function, such as: LONG OnMyMessage(WPARAM w,LPARAM l); the function has a specified format:LONG Function_Name(WPARAM w,LPARAM l);

3 Join message response macros

In the class that responds to the message, in the message response block,

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
　　 //{{AFX_MSG_MAP(CAboutDlg)
　　　　　　 // No message handlers
　　 //}}AFX_MSG_MAP
END_MESSAGE_MAP()

Add the following statement:

ON_MESSAGE(WM_MYMESSAGE, OnMyMessage)

Become the following style:

BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
　　//{{AFX_MSG_MAP(CAboutDlg)
　　ON_MESSAGE(WM_MYMESSAGE,OnMyMessage)
　　//}}AFX_MSG_MAP
END_MESSAGE_MAP()

4 in the. cpp file, edit the message response function as follows:

LONG CMyClass::OnMyMessage(WPARAM w, LPARAM l)
{
}

5 is done.