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 }