MFC dynamic Menu

1.cmenu3view Keyboard Get function parsing

1 voidCmenu3view::onchar (UINT NChar, uint nrepcnt, uint nflags)2 {4CCLIENTDC DC ( This);//gets the view handle5         if(0x0d==nchar)//If the ENTER key is detected6         {7              if(0==++m_nindex)//The initial value is-1, which indicates the first carriage return8              { 9M_menu. CreatePopupMenu ();//Create a menuTenGetParent ()->getmenu ()->appendmenu (Mf_popup, (UINT) M_menu.m_hmenu/*Make a cast*/,"Phonebook");//window size has changed, just come out, what is the situation?  OneGetParent ()->drawmenubar ();//call the parent class to make the menu bar heavy A              } -M_menu. AppendMenu (Mf_string,idm_phone1+m_nindex/*Here's the highlight .*/, M_strline.left (M_strline.find (" "))); - M_strarray.add (m_strline); theM_strline.empty ();//press ENTER to clear -               -Invalidate ();//window re-operation -  +         } -       Else +       { Am_strline+= (Char) NChar; atdc. TextOut (0,0, m_strline); -       } -  - Cview::onchar (NChar, nrepcnt, nflags); -}

2. Tips for creating a code menu
First step: Add the ABC Add submenu to the Resource option, set its ID name
Step two: Add ID name and ID number in resource.h
Step three: Add the respective command window functions and delete
Fourth step: OnCommand mapping must be put out, because it has been deleted, can not be placed in the system custom area

1 Begin_message_map (Cmenu3view, CView)2 //{{Afx_msg_map (Cmenu3view)3 On_wm_char ()4 On_wm_cancelmode ()5 6 //}}afx_msg_map7 //Standard Printing Commands8 on_command (idm_phone1, OnPhone1)9 on_command (Idm_phone2, OnPhone2)Ten on_command (Idm_phone3, OnPhone3) One on_command (idm_phone4, OnPhone4) A on_command (Id_file_print, Cview::onfileprint) - on_command (Id_file_print_direct, Cview::onfileprint) - on_command (Id_file_print_preview, Cview::onfileprintpreview) theEnd_message_map ()

3. Understanding the message mechanism OnCommand can learn the message in advance

1 BOOL Cmainframe::oncommand (WPARAM WPARAM, LPARAM LPARAM)2 {3 intMenucmdid=loword (WParam);//get low by LoWord4Cmenu3view *pview= (Cmenu3view *) GetActiveView ();//This is the call of the view class in CMainFrame, which is implemented by creating a concrete object that needs to contain the header file5 //GetActiveView () is a CMainFrame related class6 if(Menucmdid>=idm_phone1 && menucmdid<idm_phone1+pview->m_strarray.getsize ())7 {8 //MessageBox ("Test");9CCLIENTDC DC (PView);//because the character array is in the view class, the DC (PView)Tendc. TextOut (0,0, Pview->m_strarray.getat (menucmdid-idm_phone1));//M_strarray is public One returntrue;//returns TRUE to no longer perform a view operation A } -  - returnCframewnd::oncommand (WParam, lParam); the}

MFC dynamic Menu