1 //根据进程名获取进程ID
 2 DWORD GetPidByProcessName(TCHAR *pProcess) 
 3 { 
 4     HANDLE hSnapshot; 
 5     PROCESSENTRY32 lppe; 
 6     //创建系统快照 
 7     hSnapshot = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, NULL); //#include<Tlhelp32.h>
 8 
 9     if (hSnapshot == NULL) 
10         return 0; 
11 
12     //初始化 lppe 的大小 
13     lppe.dwSize = sizeof(lppe); 
14 
15     //查找第一个进程 
16     if (!::Process32First(hSnapshot, &lppe))
17         return false; 
18     do 
19     { 
20         if(StrCmp(lppe.szExeFile, pProcess) == 0)//#include<shlwapi.h>
21         { 
22             return lppe.th32ProcessID;
23         }   
24     } 
25     while (::Process32Next(hSnapshot, &lppe)); //查找下一个进程  
26 
27     return 1;
28 }
29 
30 //根据进程ID获取窗口句柄
31 HWND GetHwndByPid(DWORD dwProcessID)
32 {
33     //返回Z序顶部的窗口句柄
34     HWND hWnd = ::GetTopWindow(0);
35 
36     while ( hWnd )
37     {
38         DWORD pid = 0;
39         //根据窗口句柄获取进程ID
40         DWORD dwTheardId = ::GetWindowThreadProcessId( hWnd,&pid);
41 
42         if (dwTheardId != 0)
43         {
44             if ( pid == dwProcessID )
45             {
46                 return hWnd;
47             }
48         }
49         //返回z序中的前一个或后一个窗口的句柄
50         hWnd = ::GetNextWindow(hWnd , GW_HWNDNEXT);
51 
52     }
53     return hWnd;
54 }
55 
56 //前端显示并置顶窗口
57 void ShowForeGround(HWND hWnd)
58 {
59 
60     if (hWnd)
61     {
62         //显示窗口
63         ::ShowWindow(hWnd, SW_NORMAL);
64 
65         //前端显示
66         ::SetForegroundWindow(hWnd);
67 
68         //窗口置顶
69         ::SetWindowPos(hWnd,HWND_TOPMOST,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);
70     }
71     else
72     {
73         ::MessageBox(NULL, _T("未找到窗口"), _T("提示"),MB_OK);
74     }
75 }
76 
77 void CMFCApplication1Dlg::OnBnClickedMfcbutton1()
78 {
79     // TODO: 在此添加控件通知处理程序代码
80     DWORD dwPid = GetPidByProcessName(_T("notepad.exe"));
81     HWND hWnd = GetHwndByPid(dwPid);
82     ShowForeGround(hWnd);
83 }