RiverNile Dot Net

 Introduction To receive the path of the user's default directory, the following function(s) may be applied.     Public Shared Function GetDefaultDirectory() As String         Dim txt As String = ""         Dim paths As String() = Environment.GetFolderPath(Environment.SpecialFolder.Personal).Split(New Char() {"\"c})         For i As Integer = 0 To paths.Length - 2             txt = txt & paths(i) & "\"         Next         Dim defaultDirectory As String = Nothing         Try             If Not Directory.Exists(txt) Then                 Directory.CreateDirectory(txt) ...

The following function may used to detect if an image is upside down or not. The function will check the BitmapData.Stride value and returned value is of a Boolean type and if the returned value of BitmapData.Stride is greater than zero...then the bitmap is upside down. For further details about BitmapData Class, please check the link Link Function:     Private Function IsUpSideDownBitmap(originalBitmap As Bitmap) As Boolean         Dim bmp As Bitmap = CType(originalBitmap.Clone(), Bitmap)         Dim rect As Rectangle = New Rectangle(0, 0, bmp.Width, bmp.Height)         Dim bmpData As Imaging.BitmapData = bmp.LockBits(rect, Imaging.ImageLockMode.ReadOnly, Imaging.PixelFormat.Format32bppArgb)         Return originalBitmap IsNot Nothing AndAlso bmpData.Stride > 0     End Function Usage:    ...