Code:
VERSION 1.0 CLASS
BEGIN
MultiUse = -1 'True
END
Attribute VB_Name = "VLAX"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = False
' VLAX.CLS v1.4 (Last updated 8/27/2001)
' Copyright 1999-2001 by Frank Oquendo
'
' Permission to use, copy, modify, and distribute this software
' for any purpose and without fee is hereby granted, provided
' that the above copyright notice appears in all copies and
' that both that copyright notice and the limited warranty and
' restricted rights notice below appear in all supporting
' documentation.
'
' FRANK OQUENDO (THE AUTHOR) PROVIDES THIS PROGRAM "AS IS" AND WITH
' ALL FAULTS. THE AUTHOR SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY
' OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. THE AUTHOR
' DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
' UNINTERRUPTED OR ERROR FREE.
'
' Use, duplication, or disclosure by the U.S. Government is subject to
' restrictions set forth in FAR 52.227-19 (Commercial Computer
' Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
' (Rights in Technical Data and Computer Software), as applicable.
'
' VLAX.cls allows developers to evaluate AutoLISP expressions from
' Visual Basic or VBA
'
' Notes:
' All code for this class module is publicly available througout various posts
' at news://discussion.autodesk.com/autodesk.autocad.customization.vba. I do not
' claim copyright or authorship on code presented in these posts, only on this
' compilation of that code. In addition, a great big "Thank you!" to Cyrille Fauvel
' demonstrating the use of the VisualLISP ActiveX Module.
'
' Dependencies:
' Use of this class module requires the following application:
' 1. VisualLISP
Private VL As Object
Private VLF As Object
Private Sub Class_Initialize()
Set VL = ThisDrawing.Application.GetInterfaceObject("VL.Application.1")
Set VLF = VL.ActiveDocument.Functions
End Sub
Private Sub Class_Terminate()
Set VLF = Nothing
Set VL = Nothing
End Sub
Public Function EvalLispExpression(lispStatement As String)
Dim sym As Object, ret As Object, retval
Set sym = VLF.Item("read").funcall(lispStatement)
On Error Resume Next
retval = VLF.Item("eval").funcall(sym)
If Err Then
EvalLispExpression = ""
Else
EvalLispExpression = retval
End If
End Function
Public Sub SetLispSymbol(symbolName As String, value)
Dim sym As Object, ret, symValue
symValue = value
Set sym = VLF.Item("read").funcall(symbolName)
ret = VLF.Item("set").funcall(sym, symValue)
EvalLispExpression "(defun translate-variant (data) (cond ((= (type
data) 'list) (mapcar 'translate-variant data)) ((= (type data) 'variant)
(translate-variant (vlax-variant-value data))) ((= (type data) 'safearray)
(mapcar 'translate-variant (vlax-safearray->list data))) (t data)))"
EvalLispExpression "(setq " & symbolName & "(translate-variant " &
symbolName & "))"
EvalLispExpression "(setq translate-variant nil)"
End Sub
Public Function GetLispSymbol(symbolName As String)
Dim sym As Object, ret, symValue
symValue = value
Set sym = VLF.Item("read").funcall(symbolName)
GetLispSymbol = VLF.Item("eval").funcall(sym)
End Function
Public Function GetLispList(symbolName As String) As Variant
Dim sym As Object, list As Object
Dim Count, elements(), i As Long
Set sym = VLF.Item("read").funcall(symbolName)
Set list = VLF.Item("eval").funcall(sym)
Count = VLF.Item("length").funcall(list)
ReDim elements(0 To Count - 1) As Variant
For i = 0 To Count - 1
elements(i) = VLF.Item("nth").funcall(i, list)
Next
GetLispList = elements
End Function
Public Sub NullifySymbol(ParamArray symbolName())
Dim i As Integer
For i = LBound(symbolName) To UBound(symbolName)
EvalLispExpression "(setq " & CStr(symbolName(i)) & " nil)"
Next
End Sub
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