The gx function SetLen_VA(A,B,C) appears to require three arguments, but 
only two arguments are defined in va.gxh.  The following fragment, cut from 
va.gxh documents two arguments, but defines 3 (A,B,C).

//----------------------------------------------------------------------------
// SetLen_VA      Set the length of the VA
//
// Returns        nothing

[geogx] void
SetLn_VA   (VA,   // VA
             int); // length

#define SetLen_VA(A,B,C) SetLn_VA(A,B,C)

//----------------------------------------------------------------------------

If a gxc includes SetLen_VA with two arguments the following error message 
is generated:

Geosoft Preprocessor - Version 5.1 (Q7).
"dntdipole.gxc", line 927: too few arguments to SetLen_VA


What is the type and meaning of the third argument to SetLen_VA?

Regards,
Scott MacInnes

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