Instrument Control (GPIB, Serial, VISA, IVI)

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Data types for NI 488.2 DLL in Labview

Hi, everyone
I´m using the "Call Library Function Node" subVI in LabView to run the functions shown below:
Table 2. Visual Basic NI-488 Functions
CALL Syntax
Description
ibask (ud%, option%, value%) Checks current configuration parameters
ibcac (ud%, v%) Become Active Controller
ibclr (ud%) Clear specified device
ibcmd (ud%, cmdbuf$) Send commands from string
ibcmda (ud%, cmdbuf$) Send commands asynchronously from string
ibconfig (ud%, option%, value%) Set current configuration parameters
ibdev (BdIndx%, pad%, sad%, tmo%, eot%, eos%, ud%) Open and initialize a device descriptor
ibdma (ud%,v%) Enable/disable DMA
ibeos (ud%,v%) Change/disable EOS mode
ibeot (ud%,v%) Enable/disable END message
ibfind (udname$,ud%) Open device and return unit descriptor
ibgts (ud%,v%) Go from Active Controller to standby
ibist (ud%,v%) Set/clear ist
iblines (ud%, clines%) Returns status of the GPIB control lines
I already know how to call the DLL file, the matter now is that I couldn´t get sufficient information of the arguments inside the brackets. For example: What is the meaning of "option%" and "value%" in the ibask function. Can somebody help with this?
Thank you very much from now.
Best regards.
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Check the info provided by nyc, with this you can know what is the meaning of each sign and get an idea of how to use the functions of the DLL

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