有和没有运行前后，我发现没什么变化

Private Sub Form1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Click Dim a As Graphics Dim mypen As Pen Dim mypoints() As PointF Dim i As Integer Dim mycount As Integer

mypen = New Pen(System.Drawing.Color.Red, 3)

mycount = Me.Width / 3 ReDim mypoints(mycount)

For i = 1 To mycount mypoints(i).X = i * 10 mypoints(i).Y = -1 * (Sin(i)) ^ 2 * Me.Height Next

a = Me.CreateGraphics a.Clear(Me.BackColor) a.ScaleTransform(1, -1) a.DrawCurve(mypen, mypoints)

a.Dispose() mypen.Dispose() End Sub

在a.ScaleTransform(1, -1)中

1和-1 具体是什么意思