[转]Delphi调用cmd并取得输出文本

//转自http://www.oschina.net/code/snippet_136241_3980 

1 procedure CheckResult(b: Boolean);
 2 begin
 3   if not b then
 4     raise Exception.Create(SysErrorMessage(GetLastError));
 5 end;
 6   
 7 function RunDOS(const CommandLine: string): string;
 8 var
 9   HRead, HWrite: THandle;
10   StartInfo: TStartupInfo;
11   ProceInfo: TProcessInformation;
12   b: Boolean;
13   sa: TSecurityAttributes;
14   inS: THandleStream;
15   sRet: TStrings;
16 begin
17   Result := ‘‘;
18   FillChar(sa, sizeof(sa), 0);
19 //设置允许继承，否则在NT和2000下无法取得输出结果
20   sa.nLength := sizeof(sa);
21   sa.bInheritHandle := True;
22   sa.lpSecurityDescriptor := nil;
23   b := CreatePipe(HRead, HWrite, @sa, 0);
24   CheckResult(b);
25   
26   FillChar(StartInfo, SizeOf(StartInfo), 0);
27   StartInfo.cb := SizeOf(StartInfo);
28   StartInfo.wShowWindow := SW_HIDE;
29 //使用指定的句柄作为标准输入输出的文件句柄,使用指定的显示方式
30   StartInfo.dwFlags := STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW;
31   StartInfo.hStdError := HWrite;
32   StartInfo.hStdInput := GetStdHandle(STD_INPUT_HANDLE); //HRead;
33   StartInfo.hStdOutput := HWrite;
34   
35   b := CreateProcess(nil, //lpApplicationName: PChar
36     PChar(CommandLine), //lpCommandLine: PChar
37     nil, //lpProcessAttributes: PSecurityAttributes
38     nil, //lpThreadAttributes: PSecurityAttributes
39     True, //bInheritHandles: BOOL
40     CREATE_NEW_CONSOLE,
41     nil,
42     nil,
43     StartInfo,
44     ProceInfo);
45   
46   CheckResult(b);
47   WaitForSingleObject(ProceInfo.hProcess, INFINITE);
48   
49   inS := THandleStream.Create(HRead);
50   if inS.Size > 0 then
51   begin
52     sRet := TStringList.Create;
53     sRet.LoadFromStream(inS);
54     Result := sRet.Text;
55     sRet.Free;
56   end;
57   inS.Free;
58   
59   CloseHandle(HRead);
60   CloseHandle(HWrite);
61 end;