MFC中動態創建N級菜單以及響應事件

創建一個基於對話框的工程，工程名爲CreateMenu

爲該對話框增加一個文件菜單項和測試菜單項，如下圖所示

測試菜單項至少要有一個子菜單項
在對話框屬性中關聯該菜單
在resource.h中增加一個ID_TESTMENU宏
#define ID_TESTMENU 5000

在對話框中添加一個Button按鈕，建立消息映射，編輯代碼如下

void CCreateMenuDlg::OnButton1() 
 {
     // TODO: Add your control notification handler code here
     char buf[2];
     //獲取頂級菜單
     CMenu* pMenu=GetMenu();
     //獲取1級菜單
     CMenu* pFileMenu=pMenu->GetSubMenu(0);
     CMenu* pTestMenu=pMenu->GetSubMenu(1);
     //添加2級菜單
     if(pTestMenu->GetSafeHmenu()==NULL) 
         return;
     //添加一個2級彈出菜單，將"文件"菜單項作爲該菜單的子菜單
     pTestMenu->AppendMenu(MF_POPUP,(UINT)pFileMenu->m_hMenu,"文件");
     //添加一個2級彈出菜單，該菜單的子菜單爲空
     pTestMenu->AppendMenu(MF_POPUP,(UINT)pTestMenu->m_hMenu,"測試");
     //添加10個2級普通菜單
     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級菜單"+CString(buf));
     }
  
     //添加n級菜單
     CMenu* pnMenu=pTestMenu->GetSubMenu(2);
     pnMenu->AppendMenu(MF_POPUP,(UINT)pnMenu->m_hMenu,"3級菜單");
     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("級菜單"));
     }
     pnMenu->GetSubMenu(0)->AppendMenu(
         MF_STRING,ID_TESTMENU,"9級菜單");
 }

響應單擊菜單的事件
添加OnCommand的消息映射，編輯代碼如下

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);
 }