纯Windows API 动态创建弹出菜单CreatePopupMenu 如何响应

纯Windows API 动态创建弹出菜单CreatePopupMenu 怎么响应?

	void OnRButtonDown(WPARAM wParam, LPARAM lParam)

	{

		int x = ((int)(short)LOWORD(lParam));

		int y = ((int)(short)HIWORD(lParam));

		POINT p = {x, y};

		ClientToScreen(m_hWnd, &p);


		//HMENU m = LoadMenu((HINSTANCE)GetWindowLong(m_hWnd, GWL_HINSTANCE), MAKEINTRESOURCE(IDR_MENU1));

		HMENU hMainMenu = GetMenu(m_hWnd);

		HMENU m = CreatePopupMenu();

		AppendMenu(m, MF_STRING, 1001, _T("1001"));

		AppendMenu(m, MF_STRING, 1002, _T("1001"));

		AppendMenu(m, MF_STRING, 1003, _T("1003"));

		AppendMenu(hMainMenu, MF_STRING | MF_POPUP, (UINT)m, _T("main"));


		TrackPopupMenu(m, TPM_VERTICAL|TPM_VCENTERALIGN|TPM_RETURNCMD, p.x, p.y, 0, m_hWnd, NULL);

	}

菜单可以显示出来,但点了没用,没有触发WM_COMMAND消息
------解决思路----------------------
把参数中的 TPM_RETURNCMD 去掉， 就会有WM_COMMAND消息