如何让Delphi调用外部程序并等待其运行信息（如结束）

函数一：
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uses 
    Windows,  
    SysUtils,  
    Classes,  
    ShellAPI;  
function RunAndWait(FileName: string; Visibility: Integer): THandle;  
var 
    zAppName: array[0..512] of Char;  
    zCurDir: array[0..255] of Char;  
    WorkDir: string;  
    StartupInfo: TStartupInfo;  
    ProcessInfo: TProcessInformation;  
begin 
    try 
      StrPCopy(zAppName, FileName);  
      GetDir(0, WorkDir);  
      StrPCopy(zCurDir, WorkDir);  
      FillChar(StartupInfo, SizeOf(StartupInfo), #0);  
      StartupInfo.cb := SizeOf(StartupInfo);  
      StartupInfo.dwFlags := STARTF_USESHOWWINDOW;  
      StartupInfo.wShowWindow := Visibility;  
      if not CreateProcess(nil, zAppName, nil, nil, false, Create_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil, nil, StartupInfo, ProcessInfo) then 
      begin 
        result := 0;  
        Exit;  
      end 
      else 
      begin 
        WaitForSingleObject(ProcessInfo.hProcess, INFINITE);  
        GetExitCodeProcess(ProcessInfo.hProcess, result);  
      end;