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(Using a Component in a Service) OR (Accessing Parallel Port from NT systems)

Posted on 2003-03-23
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Last Modified: 2010-04-04
I need to read my Parallel port in a Delphi service.

I have already found a component that allows parallel-port communications.
The main problem now is that in a Service I can't add components and of course
creating it with nil doesn't work.

So this gives me the following two possible answers:
1. How to use a component in a service?
2. How to access the parallel port without a component.
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Question by:mtrimpe
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Expert Comment

by:BLayman
ID: 8193741
Turbo Power's Async Professional (www.TurboPower.com) includes examples of how to get to all the ports.  I've used the serial access controls.  Turbo power is leaving the business and has released most of its source to the OpenSource site SourceForge.net.  

I've not looked but you should be able to find what you need there and it is free!
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Author Comment

by:mtrimpe
ID: 8193926
What I look is not at all on that site. Please send me a real solution for my question, no wrong pointer.
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Author Comment

by:mtrimpe
ID: 8197710
OK everyone,

I just found out I need another component. Let's all focus on the part of using components in a service now ..
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Expert Comment

by:-mac10-
ID: 8200671
sounds like you just need to find a non-visual component.
i'm able to add a timer component to a service application just fine.
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Author Comment

by:mtrimpe
ID: 8201676
-mac10-,

If you can help me with something else I'll give you the points. Since you apparently worked with services, I need to send key events from a service. It doesn't work though, even after I have set Interactive to True. Do you have any idea?
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Accepted Solution

by:
-mac10- earned 225 total points
ID: 8204481
Are you wanting to send events from the service to another application?

If so, i'm having the same problem.
I'm able to use windows messages but not my own custom messages.  For Example, I'm able to send a WM_CLOSE to a specific window/application and get it to close, but I'm not able to define my own events.  Sorry :(
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Author Comment

by:mtrimpe
ID: 8204568
I don't need custom messages. I use standard windows key events which need to be send to the desktop itself, i.e. the active window, just like a real key press from the keyboard would do.
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