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start an ext. program

Using Delphi 5
I'll start an external program wich make the setup for another Prog. After this action I'll delete some files from the harddrive. So my Program must wait until end of the setupprogram. Also the paths must be relative like \\test\
Who have the tip?
0
tzigan
Asked:
tzigan
  • 2
1 Solution
 
Mohammed NasmanSoftware DeveloperCommented:
Hello

  try this procedure



function ExecAndWait(const FileName, Params: ShortString; const WinState: Word): boolean; export;
var
  StartInfo: TStartupInfo;
  ProcInfo: TProcessInformation;
  CmdLine: ShortString;
begin
  { Put the name of file between quotes, due to spaces in names of files in system Win9x }
  CmdLine := '"' + Filename + '" ' + Params;
  FillChar(StartInfo, SizeOf(StartInfo), #0);
  with StartInfo do
  begin
    cb := SizeOf(SUInfo);
    dwFlags := STARTF_USESHOWWINDOW;
    wShowWindow := WinState;
  end;
  Result := CreateProcess(nil, PChar( String( CmdLine ) ), nil, nil, false,
                          CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil,
                          PChar(ExtractFilePath(Filename)),StartInfo,ProcInfo);
  { Wait the finish of program }
  if Result then
  begin
    WaitForSingleObject(ProcInfo.hProcess, INFINITE);
    { Free the Handles }
    CloseHandle(ProcInfo.hProcess);
    CloseHandle(ProcInfo.hThread);
  end;
end;

Mohammed
0
 
Mohammed NasmanSoftware DeveloperCommented:
sorry that will not working, you need to replace this line
  cb := SizeOf(SUInfo);
by this line
  cb := SizeOf(StartInfo);

here's code will work fine with u


//========
function ExecAndWait(const FileName, Params: ShortString; const WinState: Word): boolean; export;
var
  StartInfo: TStartupInfo;
  ProcInfo: TProcessInformation;
  CmdLine: ShortString;
begin
  { Put the name of file between quotes, due to spaces in names of files in system Win9x }
  CmdLine := '"' + Filename + '" ' + Params;
  FillChar(StartInfo, SizeOf(StartInfo), #0);

  with StartInfo do
  begin
    cb := SizeOf(StartInfo);
    dwFlags := STARTF_USESHOWWINDOW;
    wShowWindow := WinState;
  end;
  Result := CreateProcess(nil, PChar( String( CmdLine ) ), nil, nil, false,
                          CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil,
                          PChar(ExtractFilePath(Filename)),StartInfo,ProcInfo);
  { Wait the finish of program }
  if Result then
  begin
    WaitForSingleObject(ProcInfo.hProcess, INFINITE);
    { Free the Handles }
    CloseHandle(ProcInfo.hProcess);
    CloseHandle(ProcInfo.hThread);
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  ExecAndWait( 'C:\windows\calc.exe', '', SH_SHOWNORMAL)  
end;

//======
and here's some info about paramters of the procedure

Parameter FileName = Name of program to run.
Parameter Params = Parameters necessaries for the application
Parameter WinState = Specifies how the window is to be shown:
                We can too using the constants below for this parameter:
                SW_HIDE, SW_MAXIMIZE, SW_MINIMIZE, SW_SHOWNORMAL

Best regards
Mohammed
0
 
tziganAuthor Commented:
Great, I'll check it and get it to work. Thanks
0

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