请问VC中如何切换到其他程序？

HWND g_hWnd = NULL; // 用来保存窗口的句柄

HANDLE GetProcessHandle(DWORD dwProcessId) // 得到进程句柄

{

	HANDLE hProcess = NULL;

	hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, dwProcessId);

	return hProcess;

}

BOOL CALLBACK EnumWindowsProc(HWND hWnd, LPARAM lParam) // 枚举窗口，找到窗口句柄

{

	DWORD dwId = (DWORD)lParam;

	DWORD dwProcessId = 0;

	GetWindowThreadProcessId(hWnd, &dwProcessId);

	if(dwId == dwProcessId)

	{

		g_hWnd = hWnd;

		return FALSE;

	}

	return TRUE;

}

HWND GetWindowHandle(DWORD dwProcessId) // 返回找到的窗口句柄

{

	EnumWindows(EnumWindowsProc, (LPARAM)dwProcessId);

	return g_hWnd;

}



// 函数调用示例



void CXXDlg::OnBnClickedOk()

{

	// TODO: Add your control notification handler code here



	TCHAR szApp[] = _T("F:\\BC.exe"); // 已知的应用程序路径



	DWORD aProcesses[1024] ={0};

	DWORD cbNeeded = 0;

	DWORD cProcesses = 0;

	if(EnumProcesses(aProcesses, sizeof(aProcesses), &cbNeeded))

	{

		cProcesses = cbNeeded / sizeof(DWORD);



		HANDLE hProcess = NULL;

		TCHAR szPath[MAX_PATH] = {0};



		for(DWORD i=0; i<cProcesses; i++)

		{

			DWORD dwProcessId = aProcesses[i];

			

			if((0 != dwProcessId) && (NULL != (hProcess = GetProcessHandle(dwProcessId))))

			{

				GetModuleFileNameEx(hProcess, NULL, szPath, MAX_PATH);

				if(0 == _tcscmp(szPath, szApp))

				{

					HWND hWnd = GetWindowHandle(dwProcessId);

					if(hWnd)

					{

						if(::IsIconic(hWnd))

						{

							::ShowWindow(hWnd, SW_RESTORE);

						}

						::SetForegroundWindow(hWnd);

					}

					break;

				}

			}

		}

	}

}