He will need to use DirectInput, the game controller API which is part of
DirectX.
http://msdn.microsoft.com/archive/default.asp?url=/archive/en-us/dx8_vb/dire
ctx_vb/input_tut_vb_45eq.asp

Regards

Mike

> -----Original Message-----
> From: Donny Tan [SMTP:dtth@TM.NET.MY]
> Sent: Tuesday, April 30, 2002 4:44 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      [OT]: Gameport
>
> On behalf of my colleague:
>
> "I am doing a project which is relevant to gameport interface. I face
> the problem on reading analog input. One end of the potentiometer is
> connected to +5V pin and the center pin is connected to analog pin of
> the gameport. I do not use any joystick to test my gameport. I connect
> the potentiometer to the gameport directly. However I don't know how to
> read the value of analog input by using program written in Visual Basic.
> Besides that, I have download a joystick test program called Jcenter.exe
> from CH product. I am not really understand how it works. Does anyone
> know about it or any source code that I can refer to? "
>
>
> regards,
> Donny Tan
>
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