How do I execute Win32 functions?

[rex]

How do I execute Win32 functions?
For instance, in APL+Win I can execute the Windows GetTempPath function to query the user's temp directory with:

⎕WCALL 'GetTempPath' 128 (128⍴⎕TCNUL)  
 32 C:\Users\rex\AppData\Local\Temp\

How does one do this in Dyalog?

(I am a very experienced APL programmer, but new to Dyalog.)

[JoHo]

Hi Rex,
this would be ⎕NA, for Name Association
There is a QuadNA.dws with examples in the namespace Windows.
Greetings,
JoHo

[rex]

Thanks a lot -- that will get me started.

[JoHo]

copied from the ⎕NA docu, "more examples":

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      ⎕←GetTempDir''
C:\Users\Alpha\AppData\Local\Temp\

      ⎕VR'GetTempDir'
     ∇ {temp}←GetTempDir dummy;get;size
[1]    'get'⎕NA'U4 kernel32|GetTempPath*   U4 >0T' ⍝ 
[2]    (size temp)←get 128 128
     ∇

[petermsiegel]

Of course, for this specific example, there's

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   739⌶0   ⍝ Return temporary dir name on this o/s
/tmp

and there's ⎕SH (or ⎕CMD, the Windows-style name) to execute relatively arbitrary host O/S commands.

[PGilbert]

If you don't mind using .Net here is what I am using:

To start a Win32 function:

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⎕USING∪←⊂',System.dll'
sink←System.Diagnostics.Process.Start(⊂'notepad.exe')
sink←System.Diagnostics.Process.Start(⊂'calc.exe')
sink←System.Diagnostics.Process.Start(⊂'C:\Program Files (x86)\Dyalog')

To get the TempPath:

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⎕USING∪←⊂',mscorlib.dll'
System.IO.Path.GetTempFileName

[rex]

Ha ha -- the usual APL situation:
many possible solutions, quite different from each other.
Thank you, everyone.