delphi获取DOS命令行输出函数 运行CMD命令并获取结果

procedure TForm1.Button4Click(Sender: TObject);
var
hReadPipe,hWritePipe:THandle;
si:STARTUPINFO;
lsa:SECURITY_ATTRIBUTES;
pi:PROCESS_INFORMATION;
mDosScreen:String;
cchReadBuffer:DWORD;
ph:PansiChar;
fname:PChar;
i,j:integer;
str,TEMP,ip:string;
K:Integer;
begin
Memo1.Clear;
fname:=allocmem(255);
ph:=AllocMem(5000);
lsa.nLength :=sizeof(SECURITY_ATTRIBUTES);
lsa.lpSecurityDescriptor :=nil;
lsa.bInheritHandle :=True;
try
try
if CreatePipe(hReadPipe,hWritePipe,@lsa,0)=false then
begin
ShowMessage('Can not create pipe!');
exit;
end;
fillchar(si,sizeof(STARTUPINFO),0);
si.cb :=sizeof(STARTUPINFO);
si.dwFlags :=(STARTF_USESTDHANDLES or STARTF_USESHOWWINDOW);
si.wShowWindow :=SW_HIDE;
si.hStdOutput :=hWritePipe;
StrPCopy(fname,'ping baidu.com');//执行命令
if CreateProcess( nil, fname, nil, nil, true, 0, nil, nil, si, pi) = False then
begin
ShowMessage('can not create process');
FreeMem(ph);
FreeMem(fname);
Exit;
end;
while(true) do
begin
if not PeekNamedPipe(hReadPipe,ph,1,@cchReadBuffer,nil,nil) then break;
if cchReadBuffer<>0 then
begin
if ReadFile(hReadPipe,ph^,4096,cchReadBuffer,nil)=false then break;
ph[cchReadbuffer]:=chr(0);
if ph<>'' then Memo1.Lines.Add(ph);  
end
else if(WaitForSingleObject(pi.hProcess ,0)=WAIT_OBJECT_0) then break;
Application.ProcessMessages;
Sleep(100);
end;
ph[cchReadBuffer]:=chr(0);
if ph<>'' then Memo1.Lines.Add(StringReplace(ph,#13#10,'',[rfReplaceAll])); 
CloseHandle(hReadPipe);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);
CloseHandle(hWritePipe);
FreeMem(ph);
FreeMem(fname);
except
end;
finally
end;
end;