Построить график функции Y(x)

Private Sub Command1_Click()
 
        Draw 200, 0, 6.3
 
End Sub
 
Sub Draw(n As Integer, xmin As Double, xmax As Double)
 
Dim x() As Double
Dim Y() As Double
 
    ReDim x(1 To n) As Double
    ReDim Y(1 To n) As Double
 
    xmin# = -5
    xmax# = 5
    
    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, ymin#)-(xmax, ymax#)
 
    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
 
         func = (Sin(x)) ^ 2 '::: Ìåíÿé ôîðìóëó, ïîëó÷èøü äðóãèå ãðàôèêè...
 
End Function