Создание пользовательской функции в MathCAD 11

Imports System.Reflection
Imports NetEFI
 
Public Class readfile
 
    Implements IFunction
 
    Private _info As FunctionInfo
 
    Public ReadOnly Property Info() As FunctionInfo Implements IFunction.Info
        Get
            Return _info
        End Get
    End Property
 
    Public Sub New()
 
        _info = New FunctionInfo("readfile", "filepatch", "dilimited", _
            New Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath, _
            GetType(String), _
            New Type() {GetType(String), GetType(String)}) ', GetType(TComplex(,))
    End Sub
 
    Public Function GetFunctionInfo(ByVal lang As String) As FunctionInfo Implements IFunction.GetFunctionInfo
 
        Return Info
    End Function
 
    Public Function NumericEvaluation(ByVal args As Object(), ByRef result As Object) As Boolean Implements IFunction.NumericEvaluation
 
        Dim array As String(,) = Nothing
 
        result = array
 
        Try
            Dim dfile = DirectCast(args(0), [String])
            Dim dilimeted = DirectCast(args(1), [String])
           
 
            Dim fStream As New System.IO.FileStream(dfile, IO.FileMode.Open)
            Dim sReader As New System.IO.StreamReader(fStream)
            Dim sArray As String()
            Dim I As Integer = 0
            Do While sReader.Peek >= 0
                ReDim Preserve sArray(I)
                sArray(I) = sReader.ReadLine
                I += 1
            Loop
            Dim rows As Integer = sArray.Length - 1
            Dim cols As Integer = sArray(0).Split(";").Length - 1
            'Dim array(rows, cols) As String
            Dim _array As String()
 
            For K As Integer = 0 To rows
                For J As Integer = 0 To cols
                    _array = sArray(K).Split(New Char() {";"})
                    array(K, J) = _array(J)
                Next
            Next
            result = array
 
        Catch ex As Exception
            Return False
        End Try
    End Function
 
End Class

result = array(0)

Imports System.Reflection
Imports NetEFI
Imports System.IO
 
Public Class readfile
 
    Implements IFunction
    Private _info As FunctionInfo
 
    Public ReadOnly Property Info() As FunctionInfo Implements IFunction.Info
        Get
            Return _info
        End Get
    End Property
 
    Public Sub New()
 
        _info = New FunctionInfo("readfile", "filepatch", "dilimited", _
            New Uri(Assembly.GetExecutingAssembly().CodeBase).LocalPath, _
            GetType(String), _
            New Type() {GetType(String), GetType(String), GetType(TComplex), GetType(TComplex), GetType(TComplex)}) ', GetType(TComplex(,))
    End Sub
 
    Public Function GetFunctionInfo(ByVal lang As String) As FunctionInfo Implements IFunction.GetFunctionInfo
 
        Return Info
    End Function
    Private Function readf(dfile As String, dilimited As String, n As Integer, z As Integer, x As Integer) As String
        On Error Resume Next
        If File.Exists(dfile) Then
            Dim sReader As New System.IO.StreamReader(dfile, System.Text.Encoding.UTF8)
            Dim sArray As String()
            Dim I As Integer = 0
            Do While sReader.Peek >= 0
                ReDim Preserve sArray(I)
                sArray(I) = sReader.ReadLine
                I += 1
            Loop
            If Not IsNothing(sArray) Then
                Dim rows As Integer = sArray.Length - 1
                Dim cols As Integer = sArray(0).Split(dilimited).Length - 1
                If n = 1 Then
                    readf = rows.ToString
                    rows = Nothing
                ElseIf n = 2 Then
                    readf = cols.ToString
                    cols = Nothing
                ElseIf n = 3 Then
                    Dim _array As String()
                    Dim array(rows, cols) As String
                    For K As Integer = 0 To rows
                        For J As Integer = 0 To cols
                            _array = sArray(K).Split(New Char() {dilimited})
                            array(K, J) = _array(J)
                        Next
                    Next
                    readf = array(z, x)
                    Erase array
                    Erase _array
                End If
            Else
                readf = "null"
            End If
            Erase sArray
            sReader.Close()
        Else
            readf = "error file patch"
        End If
    End Function
 
    Public Function NumericEvaluation(ByVal args As Object(), ByRef result As Object) As Boolean Implements IFunction.NumericEvaluation
 
 
        Dim dfile = DirectCast(args(0), [String])
        Dim dilimited = DirectCast(args(1), [String])
        Dim n = CInt(DirectCast(args(2), TComplex).Real)
        Dim z As Integer = CInt(DirectCast(args(3), TComplex).Real)
        Dim x As Integer = CInt(DirectCast(args(4), TComplex).Real)
 
        result = readf(dfile, dilimited, n, z, x)
    End Function
 
End Class