how to convert all the pixel value to hexadecimal and from hexadecimal to binary in vb.net

actually i need in vb.net that category is not available so that i selected as java.first i need to store the pixels in 2d array .from that i need to convert all the pixel values into hexadecimal how it can be done in for loop and to convert that hex to bin for all the pixels please`Dim xmax As Integer Dim ymax As Integer Dim x As Integer Dim y As Integer Dim bm As New Bitmap(TextBox1.Text)

    h = bm.Height
    w = bm.Width
    Dim g As Graphics = Me.CreateGraphics()
    Dim bm1 As New Bitmap(bm)
    xmax = bm.Width - 1
    ymax = bm.Height - 1
    Dim bmcolor As Color
    For y = 0 To ymax
        For x = 0 To xmax
            bmcolor = bm.GetPixel(x, y)
            bm1.SetPixel(x, y, Color.FromArgb(bmcolor.R, bmcolor.G, bmcolor.B))
        Next x
    Next y
    Dim g1 As String = Hex(bmcolor.G)
    Dim b1 As String = Hex(bmcolor.B)
    Dim r1 As String = Hex(bmcolor.R)




    Dim col5 As String
    col5 = r1 & g1 & b1
    MsgBox(col5)
    PictureBox2.Image = bm
    bin = Convert.ToString(Convert.ToInt32(col5, 16), 2)
    MsgBox(bin)` i need coding immediately help me