Problem connecting an event handler to IE in a Windows service

[SunshineGirl]

I'm trying to connect an event handler to the BeforeNavigate2 event of
Internet Explorer. This works in a Windows app, but I can't get it to work
in a Windows service. I get the following exception when I run the line
"shellWindo ws = new SHDocVw.ShellWi ndowsClass();":

COM object with CLSID {9BA05972-F6A8-11CF-A442-00A0C90A8F39} is either not
valid or not registered.

I know that this CLSID belongs to the ShellWindows interface.

Any ideas?

Here's the source code:

namespace WindowsService1
{
public class Service1 : System.ServiceP rocess.ServiceB ase
{
private System.Componen tModel.Containe r components = null;
private static SHDocVw.ShellWi ndows shellWindows = null; //<=====

public Service1()
{
InitializeCompo nent();
}

static void Main()
{
System.ServiceP rocess.ServiceB ase[] ServicesToRun;
ServicesToRun = new System.ServiceP rocess.ServiceB ase[] { new
Service1() };
System.ServiceP rocess.ServiceB ase.Run(Service sToRun);

if(!EventLog.So urceExists("Ser vice1"))
{
EventLog.Create EventSource("Se rvice1", "Applicatio n");
}
}

private void InitializeCompo nent()
{
this.ServiceNam e = "Service1";
}

protected override void Dispose(bool disposing)
{
if(disposing)
{
if(components != null)
{
components.Disp ose();
}
}
base.Dispose(di sposing);
}

protected override void OnStart(string[] args)
{
EventLog.WriteE ntry("Service1" , "0.This is just a test.",
EventLogEntryTy pe.Information) ;

shellWindows = new SHDocVw.ShellWi ndowsClass(); //<=====
foreach(SHDocVw .InternetExplor er ie in shellWindows) //<=====
ie.BeforeNaviga te2 += new
SHDocVw.DWebBro wserEvents2_Bef oreNavigate2Eve ntHandler(this. ie_BeforeNaviga t
e2); //<=====
}

public void ie_BeforeNaviga te2(object disp, ref object url, ref
object flags, ref object targetFrameName , ref object postData, ref object
headers, ref bool cancel) //<=====
{
EventLog.WriteE ntry("Service1" , "ie_BeforeNavig ate2.",
EventLogEntryTy pe.Information) ; //<=====
}

protected override void OnStop()
{
}
}
}

[Tian Min Huang]

Hello,

Thanks for your post. As I understand, the problem you are facing is that
it fails to enumerate existing IE windows from a Windows Service. Please
correct me if there is any misunderstandin g. I now share the following
information with you:

Based on my experience, I believe the reason of the problem is that a
Windows Service is running in a hidden window station and desktop other
than "WinSta0\Defaul t". To work around this problem, you may have to set
your service as an interactive service b the following steps:

1. Go to "Control Panel" -> "Service".
2. Select the service in list box and click "Startup" button.
3. Select "System Account" and check "Allow Service to Interact with
Desktop".

I belive the following article is helpful:
Interacting with the User in a Service
http://msdn.microsoft.com/library/de...us/dllproc/bas
e/interacting_wit h_the_user_in_a _service.asp

I look forward to your result.

Regards,

HuangTM
Microsoft Online Partner Support
MCSE/MCSD

Get Secure! -- www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.

[Tian Min Huang]

Hello,

Thanks for your post. As I understand, the problem you are facing is that
it fails to enumerate existing IE windows from a Windows Service. Please
correct me if there is any misunderstandin g. I now share the following
information with you:

Based on my experience, I believe the reason of the problem is that a
Windows Service is running in a hidden window station and desktop other
than "WinSta0\Defaul t". To work around this problem, you may have to set
your service as an interactive service b the following steps:

1. Go to "Control Panel" -> "Service".
2. Select the service in list box and click "Startup" button.
3. Select "System Account" and check "Allow Service to Interact with
Desktop".

I belive the following article is helpful:
Interacting with the User in a Service
http://msdn.microsoft.com/library/de...us/dllproc/bas
e/interacting_wit h_the_user_in_a _service.asp

I look forward to your result.

Regards,

HuangTM
Microsoft Online Partner Support
MCSE/MCSD

Get Secure! -- www.microsoft.com/security
This posting is provided "as is" with no warranties and confers no rights.