Detect if running in a remote session..

[Ian Branch 127]

Hi Team,

I need to detect if my delphi (10.3.2) app is running in a remote RDP session.

I want to do the detection in the Project file so I can disable the Theme.

e.g.

  Application.Initialize;
  Application.MainFormOnTaskbar := True;
  if not IsRemoteSession then TStyleManager.TrySetStyle('Iceberg Classico');

Thoughts/suggestions appreciated.

Regards & TIA,

Ian

[FredS 138]

Detecting the Remote Desktop Services environment

[Ian Branch 127]

Hi Fred,

Thanks for your suggestion..

Yes I have seen that and have tried a couple of things but none seem to work from the project file for one reason or another.

 

Ian

[Anders Melander 1783]

This works for me:

function DetectRemoteSession: boolean;
const
  SM_REMOTECONTROL      = $2001; // This system metric is used in a Terminal
                                 // Services environment. Its value is nonzero
                                 // if the current session is remotely
                                 // controlled; otherwise, 0.

  SM_REMOTESESSION      = $1000; // This system metric is used in a Terminal
                                 // Services environment. If the calling process
                                 // is associated with a Terminal Services
                                 // client session, the return value is nonzero.
                                 // If the calling process is associated with
                                 // the Terminal Server console session, the
                                 // return value is 0. The console session is
                                 // not necessarily the physical console.
var
  Mode: string;
begin
  Result := (GetSystemMetrics(SM_REMOTESESSION) <> 0) or (GetSystemMetrics(SM_REMOTECONTROL) <> 0);

  // Test for emulated local/remote mode
  if (FindCmdLineSwitchEx('Session', Mode, ['-','\','/'], True)) then
  begin
    if (SameText(Mode, 'Remote')) then
      Result := True
    else
    if (SameText(Mode, 'Local')) then
      Result := False;
  end;
end;

 

[David Heffernan 2345]

8 hours ago, Ian Branch said:

but none seem to work from the project file for one reason or another

Doesn't seem very plausible that this is the case. And it's tricky for us to dig deeper into "one reason or another". 

[Ian Branch 127]

Hi Anders,

Thank you for your suggestion.  So, this is my implementation..

program LogViewer;

uses
  Vcl.Controls,
  Vcl.Forms,
  Vcl.Themes,
  Vcl.Styles,
  System.SysUtils,
  MainFrm in 'MainFrm.pas' {MainForm};

{$R *.res}

function DetectRemoteSession: boolean;
const
  SM_REMOTECONTROL      = $2001; // This system metric is used in a Terminal
                                 // Services environment. Its value is nonzero
                                 // if the current session is remotely
                                 // controlled; otherwise, 0.

  SM_REMOTESESSION      = $1000; // This system metric is used in a Terminal
                                 // Services environment. If the calling process
                                 // is associated with a Terminal Services
                                 // client session, the return value is nonzero.
                                 // If the calling process is associated with
                                 // the Terminal Server console session, the
                                 // return value is 0. The console session is
                                 // not necessarily the physical console.
var
  Mode: string;
begin
  Result := (GetSystemMetrics(SM_REMOTESESSION) <> 0) or (GetSystemMetrics(SM_REMOTECONTROL) <> 0);

  // Test for emulated local/remote mode
  if (FindCmdLineSwitchEx('Session', Mode, ['-','\','/'], True)) then
  begin
    if (SameText(Mode, 'Remote')) then
      Result := True
    else
    if (SameText(Mode, 'Local')) then
      Result := False;
  end;
end;

begin
  //
  Application.Initialize;
  Application.MainFormOnTaskbar := True;
  if not DetectRemoteSession then TStyleManager.TrySetStyle('Iceberg Classico');
  Application.CreateForm(TMainForm, MainForm);
  Application.Run;
  //
end.

Unfortunately, despite having vcl.controls in the uses, getsystemmetrics is still not recognised. :-(

Nor does it know anything about FindCmdLineSwitchEx

 

Thoughts/Suggestions?

 

Regards,

Ian

 

[David Heffernan 2345]

GetSystemMetrics is from Winapi.Windows. Use a find in files search of the rtl/vcl source to find which unit contains specific functions. 

[Angus Robertson 574]

There is no need for the function DetectRemoteSession to be in the DPR, it can just as easily be in MainFrm.pas,  just not in a method in a  form.  

 

Angus

 

[Anders Melander 1783]

FindCmdLineSwitchEx: Just replace  it with:

FindCmdLineSwitch('Session', Mode, True)

or simply remove the whole block. It's just for testing.

[Ian Branch 127]

All,

Thank you for your input.  Much appreciated.

It is now working as desired.

 

Regards & Tks again.

Ian