MFC添加下拉菜单、右键菜单

#在头文件声明一个CMenu对象m_Menu
CMenu m_Menu;

#在Resource.h中定义三个ID
#define ID_MENUCAT                      1011
#define ID_MENUDOG                      1012
#define ID_MENUMONKEY                   1013

#在OnInitDialog方法中添加代码
m_Menu.CreateMenu();
CMenu m_PopMenu;
m_PopMenu.CreatePopupMenu();
m_Menu.AppendMenu(MF_POPUP, (UINT)m_PopMenu.m_hMenu, "动物");
m_PopMenu.AppendMenu(MF_STRING, ID_MENUCAT, "猫");
m_PopMenu.AppendMenu(MF_STRING, ID_MENUDOG, "狗");
m_PopMenu.AppendMenu(MF_STRING, ID_MENUMONKEY, "猴子");
m_PopMenu.Detach();
CMenu m_PopMenuPlant;
m_PopMenuPlant.CreatePopupMenu();
m_Menu.AppendMenu(MF_POPUP, (UINT)m_PopMenuPlant.m_hMenu, "植物");
m_PopMenuPlant.AppendMenu(MF_STRING, ID_MENUFLOWER, "花朵");
m_PopMenuPlant.Detach();
SetMenu(&m_Menu);


#添加菜单的消息处理函数
#在头文件中声明
afx_msg void OnMenucat();
afx_msg void OnMenudog();
afx_msg void OnMenumonkey();

#在源文件中添加消息宏映射
ON_COMMAND(ID_MENUCAT, OnMenucat)
ON_COMMAND(ID_MENUDOG, OnMenudog)
ON_COMMAND(ID_MENUMONKEY, OnMenumonkey)

#在源文件中实现消息处理函数
void CTestDlg::OnMenucat(){
	MessageBox("猫菜单被按下");
}

void CTestDlg::OnMenudog(){
	MessageBox("小狗菜单被按下");
}

void CTestDlg::OnMenumonkey(){
	MessageBox("猴子菜单被按下");
}

#添加一个菜单资源，ID自定义，我在这里定为IDR_MENU_RIGHT

#在头文件添加消息处理函数
afx_msg void OnRButtonUp(UINT nFlags, CPoint point);

#在源文件中添加消息宏映射
ON_WM_RBUTTONUP()

#在源文件中实现消息处理函数
void CTestDlg::OnRButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CMenu PopMenu;
	PopMenu.LoadMenu(IDR_MENU_RIGHT);
	CMenu* pMenu = PopMenu.GetSubMenu(0);
	CRect rect;
	ClientToScreen(&point);
	rect.top = point.x;
	rect.left = point.y;
	pMenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_VERTICAL, rect.top, rect.left, this);

	CDialog::OnRButtonUp(nFlags, point);
}