MFC中动态创建N级菜单以及响应事件

创建一个基于对话框的工程，工程名为CreateMenu

为该对话框增加一个文件菜单项和测试菜单项，如下图所示

测试菜单项至少要有一个子菜单项
在对话框属性中关联该菜单
在resource.h中增加一个ID_TESTMENU宏
#define ID_TESTMENU 5000

在对话框中添加一个Button按钮，建立消息映射，编辑代码如下

void CCreateMenuDlg::OnButton1() 
 {
     // TODO: Add your control notification handler code here
     char buf[2];
     //获取顶级菜单
     CMenu* pMenu=GetMenu();
     //获取1级菜单
     CMenu* pFileMenu=pMenu->GetSubMenu(0);
     CMenu* pTestMenu=pMenu->GetSubMenu(1);
     //添加2级菜单
     if(pTestMenu->GetSafeHmenu()==NULL) 
         return;
     //添加一个2级弹出菜单，将"文件"菜单项作为该菜单的子菜单
     pTestMenu->AppendMenu(MF_POPUP,(UINT)pFileMenu->m_hMenu,"文件");
     //添加一个2级弹出菜单，该菜单的子菜单为空
     pTestMenu->AppendMenu(MF_POPUP,(UINT)pTestMenu->m_hMenu,"测试");
     //添加10个2级普通菜单
     for(UINT m_ID=1;m_ID<=10;m_ID++)
     {
         itoa(m_ID,buf,10);
         pTestMenu->AppendMenu(MF_SEPARATOR);
         pTestMenu->AppendMenu(
             MF_STRING,m_ID+ID_TESTMENU,"2级菜单"+CString(buf));
     }
  
     //添加n级菜单
     CMenu* pnMenu=pTestMenu->GetSubMenu(2);
     pnMenu->AppendMenu(MF_POPUP,(UINT)pnMenu->m_hMenu,"3级菜单");
     for(int i=0;i<5;i++)
     {
         pnMenu=pnMenu->GetSubMenu(0);
         if(pnMenu==NULL) return;
         itoa(i+4,buf,10);
         pnMenu->AppendMenu(
             MF_POPUP,(UINT)pnMenu->m_hMenu,buf + CString("级菜单"));
     }
     pnMenu->GetSubMenu(0)->AppendMenu(
         MF_STRING,ID_TESTMENU,"9级菜单");
 }

响应单击菜单的事件
添加OnCommand的消息映射，编辑代码如下

BOOL CCreateMenuDlg::OnCommand(WPARAM wParam, LPARAM lParam) 
 {
     // TODO: Add your specialized code here and/or call the base class
     UINT uMsg=LOWORD(wParam);
     char buf[2];
     if(uMsg==ID_TESTMENU)
     {
                 MessageBox("HELLO!");
     }
     for(UINT i=1;i<=10;i++)
     {
         if(uMsg==ID_TESTMENU+i)
         {
             itoa(i,buf,10);
             MessageBox("HELLO! " + CString(buf));
         }
     }
     return CDialog::OnCommand(wParam, lParam);
 }