Question

DOS Application window in my form

Asked by: graga

This is a strange one. I want to be able to run a DOS application so it displays INSIDE my form. Like when you start command prompt it appears in its own window. I want this window to be in my form.

1. The application will be initiated from Delphi.
2. DOS Application should be terminated from itself or from my Delphi application

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Asked On
2002-05-10 at 01:34:42ID20299112
Tags

delphi

Topic

Delphi Programming

Participating Experts
7
Points
200
Comments
18

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Answers

 

by: TomasHelgiPosted on 2002-05-10 at 01:53:13ID: 7000749

Hi!

Take a look at the TDosMemo v.1.00 on Torry's Delphi Pages
http://www.torry.net/memos.htm
This is a great way to display a running DOS application "inside" a Delphi form.

Regards,
Tomas Helgi

 

by: ginsonicPosted on 2002-05-10 at 02:16:18ID: 7000778

interested

 

by: gragaPosted on 2002-05-10 at 02:36:51ID: 7000811

Tomas, which memo component is that?

 

by: TomasHelgiPosted on 2002-05-10 at 03:04:00ID: 7000873

I gave you the name of the component (TDosMemo).
Go to the link I posted and scroll half way down and
you should see it.

Regards,
Tomas Helgi

 

by: gragaPosted on 2002-05-10 at 03:48:44ID: 7000960

Tomas, sorry it's been a long day...

I'm just reading the description of the component. It looks like the component lets you re-direct output from a DOS application to a memo, not to run the program. That's not what I need.

Graga

 

by: MBoPosted on 2002-05-10 at 04:17:57ID: 7001030

 

by: MBoPosted on 2002-05-10 at 04:21:24ID: 7001037

sorry above link isn't working
Try
http://master-brain.boom.ru
then press Download
and find
DosCommand.zip

 

by: geobulPosted on 2002-05-10 at 04:23:40ID: 7001044

listening...

 

by: gragaPosted on 2002-05-10 at 12:07:27ID: 7002149

MBo,

I think we are on the wrong track. Both components allow to capture DOS command output to a memo field. This is not what I want. I want to display an interactive DOS application.

graga

 

by: Lee_NoverPosted on 2002-05-10 at 14:30:41ID: 7002413

well you can launch the dos app with CreateProcess then use dwProcessID from  the returned PROCESSINFO structure
to get the window from the processid use the folowing code

function EnumWindowsProc(Wnd: hWnd; ProcWndInfo: PProcessWindow): BOOL;
stdcall;
var
    WndProcessID: Cardinal;
begin
    GetWindowThreadProc(Wnd, WndProcessID);
    if WndProcessID = ProcWndInfo^.TargetProcessID then begin
        ProcWndInfo^.FoundWindow := Wnd;
        Result := False; // This tells EnumWindows to stop enumerating since
we've already found a window.
    end else Result := True; // Keep searching
end;

function GetProcessWindow(TargetProcessID: Cardinal): hWnd;
var
    ProcWndInfo: TProcessWindow;
begin
    ProcWndInfo.TargetProcessID := TargetProcessID;
    ProcWndInfo.FoundWindow := 0;
    EnumWindows(@EnumWindowsProc, @ProcWndInfo);
    Result := ProcWndInfo.FoundWindow;
end;


then simply set the windows parent to your form or panel or whatever control you wish  
the usage would be smth like :

ok:=CreateProcess(nil, 'DosApp.exe, nil, nil, true,
      NORMAL_PRIORITY_CLASS, nil, nil, si, pi);
if ok then
  Windows.SetParent(GetProcessWindow(pi.dwProcessId), somePanel.Handle);

I haven't tested it but that's the basic idea :)

 

by: Lee_NoverPosted on 2002-05-10 at 14:33:37ID: 7002418

forgot the :

type
  PProcessWindow = ^TProcessWindow;
  TProcessWindow = record
    TargetProcessID: Cardinal;
    FoundWindow: hWnd;
  end;

 

by: Lee_NoverPosted on 2002-05-10 at 14:51:18ID: 7002454

ehh :) just made a test app ,, the code bellow works just fine :



unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, ExtCtrls;

type
  PProcessWindow = ^TProcessWindow;
  TProcessWindow = record
    TargetProcessID: Cardinal;
    FoundWindow: hWnd;
  end;

  TForm1 = class(TForm)
    Button1: TButton;
    Panel1: TPanel;
    OpenD: TOpenDialog;
    procedure Button1Click(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;
  hDosWin: HWND = 0;

implementation

{$R *.dfm}

function EnumWindowsProc(Wnd: hWnd; ProcWndInfo: PProcessWindow): BOOL;stdcall;
var
   WndProcessID: Cardinal;
begin
   GetWindowThreadProcessId(Wnd, WndProcessID);
   if WndProcessID = ProcWndInfo^.TargetProcessID then begin
       ProcWndInfo^.FoundWindow := Wnd;
       Result := False; // This tells EnumWindows to stop enumerating since we've already found a window.
   end else Result := True; // Keep searching
end;

function GetProcessWindow(TargetProcessID: Cardinal): hWnd;
var
   ProcWndInfo: TProcessWindow;
begin
   ProcWndInfo.TargetProcessID := TargetProcessID;
   ProcWndInfo.FoundWindow := 0;
   EnumWindows(@EnumWindowsProc, Integer(@ProcWndInfo));
   Result := ProcWndInfo.FoundWindow;
end;

procedure TForm1.Button1Click(Sender: TObject);
var si: STARTUPINFO;
    pi: TProcessInformation;
    ok: Boolean;
begin
     if not OpenD.Execute then exit;
     FillChar(si, SizeOf(si), 0);
     si.cb:=SizeOf(si);
     si.wShowWindow:=SW_SHOW;
     ok:=CreateProcess(nil, PChar(OpenD.FileName), nil,
       nil, true, CREATE_NEW_CONSOLE or NORMAL_PRIORITY_CLASS, nil, nil, si, pi);

     if not ok then exit;

     hDosWin:=GetProcessWindow(pi.dwProcessID);
     if hDosWin > 0 then
     begin
       Windows.SetParent(hDosWin, Panel1.Handle);
       SetWindowPos(hDosWin, 0, 0, 0, 0, 0, SWP_NOSIZE or SWP_NOZORDER);
     end;

     // we don't need the handles so we close them
     CloseHandle(pi.hProcess);
     CloseHandle(pi.hThread);
end;

procedure TForm1.FormClose(Sender: TObject; var Action: TCloseAction);
begin
     if hDosWin > 0 then
        PostMessage(hDosWin, WM_CLOSE, 0, 0);
end;

end.

 

by: gragaPosted on 2002-05-10 at 18:50:32ID: 7002713

Lee, this looks good!
I can't however compile your code. It's complaining about "Variants" in uses clause.
When removed, GetWindowThreadProcessId complains about incompatible types.
I'm running D5

 

by: geobulPosted on 2002-05-10 at 23:42:07ID: 7002873

Hi,

I also like it. Nice code Lee_Nover ;-)

1. My uses clause (D5):
uses Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  ExtCtrls, StdCtrls;

2.
GetWindowThreadProcessId(Wnd, @WndProcessID);

3.Add
Sleep(100);
or more after CreateProcess to let the new process to create its main window.

Regards, Geo

 

by: Lee_NoverPosted on 2002-05-11 at 06:11:31ID: 7003126

ahh yes sorry about the incompatibility :)
as you can see from the first code it is made for D5, I had to change it coz I'm using D6 :)
glad it helps :)

 

by: L44Posted on 2002-11-21 at 00:11:37ID: 7477078

I would also like to know how to run command prompt in my application ? Lee Nover, I've compiled your code,but still don't know how does it work?! what should I open, when open dialog appear ? cmd.exe ?

Thanks

 

by: RBritzPosted on 2008-07-11 at 06:32:12ID: 21982184

Hi all, I know this is an old thread, but, I was wondering...

The above code compiles/runs without any errors, but doesn't move/assign the dos window to the Panel as a parent (maybe it does, but the dos window is still not running in the panel), BUT as soon as I debug and step through it.... the dos window is assigned to the panel. I'm using D6... Any Ideas!?

 

by: geobulPosted on 2008-07-11 at 14:05:58ID: 21986049

Hi,

Add
Sleep(100);
or more after CreateProcess to let the new process to create its main window. Otherwise GetProcessWindow will return nothing and you won't have a window handle to set parent to.

Regards, Geo

20120131-EE-VQP-002

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