.NET在指定控件裡畫漸變色

Private Fcolor As Color = Color.White ''前景色
    Private Tcolor As Color = Color.FromArgb(213, 242, 250)  ''背景色
    Private Direct As LinearGradientMode = LinearGradIEntMode.Vertical ''漸變方向
    Private g As Graphics   

Private Sub Form_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint
        g = e.Graphics
        Dim lb As New LinearGradientBrush(ClIEntRectangle, Fcolor, Tcolor, Direct)
        g.FillRectangle(lb, ClIEntRectangle) ''繪制窗口背景
    End Sub