Get a rectangle from a bitmap and save to file

Well you could use BitBlt....  I'll see if there is a VB.NET equiv'

   Const SRCCOPY As Integer = &HCC0020
    Private Declare Function BitBlt Lib "gdi32" Alias "BitBlt" (ByVal hDestDC As Integer, ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer, ByVal nHeight As Integer, ByVal hSrcDC As Integer, ByVal xSrc As Integer, ByVal ySrc As Integer, ByVal dwRop As Integer) As Integer




    Dim BitmapSrc As New Bitmap("C:\X.bmp")
    Dim BitmapSrcGraphic As Graphics
    Dim BitmapSrcHDC As IntPtr
    BitmapSrcGraphic = BitmapSrcGraphic.FromImage(BitmapSrcObj)

    Dim BitmapDest As New Bitmap(320, 240)
    Dim BitmapDestGraphic As Graphics
    Dim BitmapDestHDC As IntPtr
    BitmapDestGraphic = BitmapDestGraphic.FromImage(BitmapDestObj)

    Dim BltReturn As Integer


    BltReturn = BitBlt(BitmapDestHDC.ToInt32, 0, 0, 320, 240, BitmapSrcHDC.ToInt32, 5, 5, SRCCOPY)

=======

Non tested... let me know of problems