dll help for electronic card c# 2005

Ive been trying to program using the dll that is supplied with a USB Relay card.

The source code supplied was in VB 5 or 6 , not that I know that matters, doesnt mean the dll was written in that or that it matters ??

Anyway the error I get is 'the best overloaded method match for OCUSB.classOCUSB.RelayON(ref byte, ref byte) has some invalid arguments

Code:

---

    C# 2005
        classOCUSB myUSB = new classOCUSB();
           
            bool myBool = true;
            byte a = 0;
            byte b = 1;

            myBool = myUSB.RelayOn(0, 1);
            mybool = myUSB.RelayOn(a, b);
            myBool = myUSB.SetPWM(0, 127);

---

Any ideas what is wrong ?
'-------------------------------------------------------------------
'Function: RelayOn(Address As Byte, Number As Byte) As Boolean
' Turns off a relay specified by Number
' For the unit defined by Address
'Inputs: Number - The number of the Relay to turn on
' 1-8 = Relays 1-8
' 0 = All Relays OFF
'Returns: True = Success
' False = Timed out
'-------------------------------------------------------------------

i had to include 'ref' as in relayOn(ref a, ref b); :blush:

however I am having a problem in importing another dll. If you can help , it is inpout32.dll from http://www.logix4u.net/ ->

dll -- will not add to project error ?

I have tried to add reference to either 32 or 64 bit dll. I have tried creating the dll from the source. I keep getting error when I try to add reference,

PHP Code:

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'make sure the file is accessible and that it is a valid assembly or COM component etc etc ' 


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I am using vs 2005 c#

what do i need to do please ?

Exactly same problem with the io.dll from link below. If anyone can have a look .

http://www.oceancontrols.com.au/cont...relay_k074.htm

You don't need to do that. Just use standard API syntax to declare the functions form the DLL.

thanks, it is successful.