using VBA to control instruments on GPIB BUS

[mustangcoupe]

I asked for help a while ago but was pulled away from my project and now am getting back to it and am in need of more help.

I am trying to communicate via VBA excel with an instrument on the GPIB. my board index is 0 and instrument address is 21.
excel dosent like ud%. it highlights it and I get

cant find project or libary;


this is my test code can someone help please.
Sub test()
Call ibdev(0, 21, 0, T10s, 1, 0, ud%)
Call ibwrt(ud%, "P&quot
Call ibrd(ud%, Data)
Call ibwrt(ud%, "D&quot
Call ibrd(ud%, Data1)
End Sub

 

[mustangcoupe]

ok I have resolved that one on my own, I guess I had a missin referance (that I wasnt even calling) but it is ok now. BUT now when I try and run the test sub then I get a ByRef argument mismatch. what is XXXXXX is this????