Windows service with icon on taskbar

I've developed a windows service that monitors the database and shows
icon of a different color depending on the data. To be able to show an
icon I have to select the "Allow service to interact with desktop"
checkbox on the service, and when I do it manually, the icon shows just
fine.

But I want the users to double-click the installation file and not have
to go to the Services and select the checkbox. So I used this example
http://www.codeproject.com/csharp/Cs...iceDesktop.asp to check
the checkbox programmatically. I found out that it selected the
checkbox, but the icon still doesn't show. But if I go and manually
deselect and select the checkbox, it starts working. So I figured that
piece of code in the example does select the checkbox, but does not
really change the property of the service.

I also tried this:
ServiceController sc = new ServiceController("MyServiceName");
sc.ServiceType = ServiceType.InteractiveProcess;

but got an error message:
Property or indexer
'System.ServiceProcess.ServiceController.ServiceTy pe' cannot be
assigned to -- it is read only.

So I am wondering if there is any way to allow a service to interact
with desktop programmatically. Would appreciate any help.

I've developed a windows service that monitors the database and shows
icon of a different color depending on the data. To be able to show an
icon I have to select the "Allow service to interact with desktop"
checkbox on the service, and when I do it manually, the icon shows
just fine.

But I want the users to double-click the installation file and not
have to go to the Services and select the checkbox. So I used this
example http://www.codeproject.com/csharp/Cs...iceDesktop.asp
to check the checkbox programmatically. I found out that it selected
the checkbox, but the icon still doesn't show. But if I go and
manually deselect and select the checkbox, it starts working. So I
figured that piece of code in the example does select the checkbox,
but does not really change the property of the service.

I also tried this:
ServiceController sc = new ServiceController("MyServiceName");
sc.ServiceType = ServiceType.InteractiveProcess;
but got an error message:
Property or indexer
'System.ServiceProcess.ServiceController.ServiceTy pe' cannot be
assigned to -- it is read only.
So I am wondering if there is any way to allow a service to interact
with desktop programmatically. Would appreciate any help.

Thanks for quick reply, guys.

Ok, I guess my whole approach is wrong. It doesn't have to be a
service. What I need is some kind of program that starts when a user
logs in, it should run in the background and check the database once
in a while. When a certain data appears in the database, an icon on a
taskbar should change. So what is the easiest way to do it?