Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

GetExitCodeProcess

Posted on 1998-08-08
3
Medium Priority
?
248 Views
Last Modified: 2010-04-04
How can i create a timer for my application to call GetExitCodeProcess() . If the function returns 0
and the lpExitCode is STILL_ACTIVE , the program has not yet been terminated . If the function returns true , then the lpExitCode has the returned error value ( errorlevel ) ,

Can anyone help me.. i need a source please..!! THANKS
0
Comment
Question by:ichen
  • 2
3 Comments
 
LVL 8

Accepted Solution

by:
ZifNab earned 300 total points
ID: 1361731
Hi ichen,

Is this what you want?

function WinExecAndWait32(FileName:String; Visibility :
integer):integer;
var
  zAppName:array[0..512] of char;
  zCurDir:array[0..255] of char;
  WorkDir:String;
  StartupInfo:TStartupInfo;
  ProcessInfo:TProcessInformation;
begin
  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, { pointer to command line string }
    nil, { pointer to process security attributes }
    nil, { pointer to thread security attributes }
    false, { handle inheritance flag }
    CREATE_NEW_CONSOLE or { creation flags }
    NORMAL_PRIORITY_CLASS,
    nil, { pointer to new environment block }
    nil, { pointer to current directory name }
    StartupInfo, ointer to STARTUPINFO }
    ProcessInfo) then Result := -1 { pointer to PROCESS_INF }
  else begin
    WaitforSingleObject(ProcessInfo.hProcess,INFINITE);
    GetExitCodeProcess(ProcessInfo.hProcess,Result);
  end;
end;

Zif.

Regr
0
 
LVL 4

Expert Comment

by:erajoj
ID: 1361732
Hi,
ZifNab's answer is the way to do it. Just execute his code in a thread so that your main app doesn't lock.
If you still want to do it the timer way; here's an example I just whipped together:

type
  TProcessWatch = class( TTimer )
  private
    FhProcess : THandle;
    FiExitCode: Integer;
    FbRunning : Boolean;
    FOnExit   : TNotifyEvent;
    procedure FWatch(Sender: TObject);
    property  OnTimer;
  public
    constructor Create( AOwner: TComponent; Process: THandle; Suspended: Boolean );
    procedure   Start;
    procedure   Stop;
    property    Handle  : THandle read FhProcess write FhProcess;
    property    ExitCode: Integer read FiExitCode;
    property    Running : Boolean read FbRunning;
    property    OnProcessExit: TNotifyEvent read FOnExit write FOnExit;
  end;

.

procedure TProcessWatch.FWatch(Sender: TObject);
var
  iExitCode: Integer;
begin
  if ( GetExitCodeProcess( FhProcess, iExitCode ) )
  then begin
    FiExitCode := iExitCode;
    FbRunning  := ( iExitCode = STILL_ACTIVE );
    if ( not FbRunning ) and Assigned( FOnExit )
    then FOnExit( Self );
  end else begin
    FiExitCode := -1;
    FbRunning  := False;
  end;
end;

constructor TProcessWatch.Create( AOwner: TComponent; Process: THandle; Suspended: Boolean );
begin
  inherited Create( AOwner );
  inherited OnTimer := FWatch;
  FhProcess         := Process;
  OnTimer( Self ); // get initial status
  Enabled := not Suspended;
end;

procedure   TProcessWatch.Start;
begin
  Enabled := True;
end;

procedure   TProcessWatch.Stop;
begin
  Enabled := False;
end;

To use it:

procedure TForm1.OnExitProc(Sender: TObject);
begin
  Windows.Beep( 1000, 1000 );
  ( Sender as TProcessWatch ).Free;
end;

.

procedure TForm1.NotepadButtonClick(Sender: TObject);
var
  Command    : string;
  StartupInfo: TStartupInfo;
  ProcessInfo: TProcessInformation;
begin
  Command := 'notepad';
  FillChar(StartupInfo, Sizeof(StartupInfo),#0);
  StartupInfo.cb := SizeOf( StartupInfo );
  StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
  StartupInfo.wShowWindow := SW_SHOWNORMAL;
  if CreateProcess(nil,
    PChar(Command),           { pointer to command line string }
    nil,                      { pointer to process security attributes }
    nil,                      { pointer to thread security attributes }
    false,                    { handle inheritance flag }
    CREATE_NEW_CONSOLE or     { creation flags }
    NORMAL_PRIORITY_CLASS,
    nil,                      { pointer to new environment block }
    nil,                      { pointer to current directory name }
    StartupInfo,              { pointer to STARTUPINFO }
    ProcessInfo)              { pointer to PROCESS_INF }
  then begin
    with TProcessWatch.Create( Self, ProcessInfo.hProcess, True ) do begin // create suspended
      OnProcessExit := OnExitProc;
      Interval := 100; // faster check than def
      Start;
    end;
  end;
end;

Not pretty, but working!

/// John
0
 
LVL 8

Expert Comment

by:ZifNab
ID: 1361733
you whipped good John :-), Zif.
0

Featured Post

[Webinar] Cloud and Mobile-First Strategy

Maybe you’ve fully adopted the cloud since the beginning. Or maybe you started with on-prem resources but are pursuing a “cloud and mobile first” strategy. Getting to that end state has its challenges. Discover how to build out a 100% cloud and mobile IT strategy in this webinar.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an anti-spam), the admin…
Are you ready to place your question in front of subject-matter experts for more timely responses? With the release of Priority Question, Premium Members, Team Accounts and Qualified Experts can now identify the emergent level of their issue, signal…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question