Question on the parameter type of DLL functions

Question on the parameter type of DLL functions
I am trying to develop an interface to control a laser with LV8.2 I am planing to use the VI “Call Library Function Node” to call the DLL and set the exact same parameters of functions in the DLL.
According to the DLL manual of the laser, there are six functions. One of the prototypes is: function getstatuspointer : pointer. I don't know how to set this parameter for the function. Is there anyone who can give some hints? Thanks!
BTW :The following is a description of the function:
This function returns a 32 bit pointer to the STATUS data structure (Tstatusrec). In the 32 bit DLL, every application is using its own copy of the data structure (local
memory). The data structure is a packed structure. "packed" means that the fields in the structure are not aligned on word or double-word boundaries.
Tstatusrec = packed record
                        size : word;
                        initstat : byte;
                        queuefill : byte;
                        anzapp16 : word; (not used)
                        anzapp32 : word;
                        anzdock16 : word; (not used)
                        anzdock32 : word;
                        dll16ver : tchararray; (not used)
                        dll32ver : tchararray;
                        excimerver : tchararray;
                        excimer : TExcimerStatus;
                  end;

Hi Jack,
This is a good starting point when using Call Library Function node. Check out this Help Page
Van L
NI Applications Engineer

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Message Edited by Josh W. on 12-11-2009 01:08 PM
Josh W.
Certified TestStand Architect
Formerly blue

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ccccccccccccccccc
cccccccccccccccccccccccccc
c subroutine ftoc (n,f,c)
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ccccccccccccccccccccccccccccccccccccccccccc

[posted and mailed]
[email protected] (Rory Stieger) wrote in <[email protected]>:
>
>Hi
>
>I am a novice to fortran programing but want to use existing fortran
>code within Labview. I have Digital Visual Fortran 5.0A and have
>suceeded in making an elementary .DLL and calling it with the Labview
>call library function.
>
>
>However, this only works if I set the parameter types to 'Adapt to
>Type'. If I try to specify the types Labview crashes with an invalid
>page fault. This particular example has only real parameters. I have
>tried with arrays and have even less sucess as the 'Adapt to Type'
>option does not even work in these cases.
>
>Any help or explanation would be most appreciated.
>
>Rory Stieger
>
>PS : If it's any help here is the fortran code (the commented out bits
>for the test with arrays)
>
>ccccccccccccccccccccccccccccccccccccccccccc
>c subroutine ftoc (n,f,c)
> subroutine ftoc (f,c)
> implicit none
> !DEC$ ATTRIBUTES DLLEXPORT :: ftoc
> !DEC$ ATTRIBUTES ALIAS :'ftoc'::ftoc
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> real*8 f,c
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>c c(i) = (5.0/9.0) * (f*i-32.0)
> c = (5.0/9.0) * (f-32.0)
>c end do
> return
> end
>ccccccccccccccccccccccccccccccccccccccccccc
>
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<element name="cname" value="cname"/>
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</dataTemplate>
Thanks in advance.
Regards,
SP

Hi Rani,
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