设置窗体背景图片，并且让图片随着窗体的大小的调整而调整大小

Private r As RectangleF       Private m_image As Image = Image.FromFile("g:\picture.bmp")       Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load         Try             r = New RectangleF(0, 0, Me.ClientSize.Width, Me.ClientSize.Height)         Catch ex As Exception             MessageBox.Show(ex.Message)         End Try     End Sub       Private Sub mydrawimage()         Try             Dim g As Graphics = Me.CreateGraphics             g.DrawImage(m_image, r)             g.Dispose()         Catch ex As Exception           End Try     End Sub     Private Sub Form1_Paint(ByVal sender As Object, ByVal e As System.Windows.Forms.PaintEventArgs) Handles MyBase.Paint           mydrawimage()       End Sub       Private Sub Form1_Resize(ByVal sender As Object, ByVal e As System.EventArgs) Handles MyBase.Resize           r = New RectangleF(0, 0, Me.ClientSize.Width, Me.ClientSize.Height)           mydrawimage()     End Sub