Построение графика функции

fYfun = Exp(-0.3 * fX) * Sin(5 * fX)

Private Sub cmdGraph_Click()
  ...
  ' Масштаб
  fMinX = -10
  fMaxX = 10
  ...
End Sub

Private Sub Command1_Click()
 
        Me.ScriptControl1.Reset
        
        Expr = Me.Text1.Text
 
        Draw
 
End Sub
 
Sub Draw()
Dim n   As Long 'Integer
Dim x() As Double
Dim Y() As Double
 
    Me.Picture1.Cls
 
    n = Val(Me.Text4.Text)
 
    ReDim x(1 To n) As Double
    ReDim Y(1 To n) As Double
 
    xmin# = Val(Me.Text2.Text)
    xmax# = Val(Me.Text3.Text)
    
    dx# = (xmax - xmin) / n
    
    xx# = xmin
    
    For i& = 1 To n
        x(i&) = xx#
        Y(i&) = Func(xx#)
        xx# = xx# + dx#
    Next i&
 
    ymax# = Y(1)
    ymin# = Y(1)
 
    For i& = 1 To n
        If Y(i&) > ymax# Then ymax# = Y(i&)
        If Y(i&) < ymin# Then ymin# = Y(i&)
    Next i&
    
    Me.Picture1.Scale (xmin#, ymax#)-(xmax#, ymin#)
 
    Me.Picture1.PSet (x(1), Y(1)), QBColor(12)
 
    For i& = 1 To n
        Me.Picture1.Line -(x(i&), Y(i&)), QBColor(12)
    Next i&
 
    Me.Picture1.Line (xmin, 0)-(xmax, 0), QBColor(0)
    Me.Picture1.Line (0, ymin#)-(0, ymax#), QBColor(0)
 
End Sub
 
Function Func(x As Double) As Double
 
         Me.ScriptControl1.ExecuteStatement ("x=" & Replace$(CStr(x), ",", "."))
         
         Func = Me.ScriptControl1.Eval(Expr)
 
End Function