From your earlier post you said that the DIB was returned as an object. The
thread I referenced is C# code that shows how to retrieve a DIB from a
drag/drop event (as an object) and convert it to an image. This code could
easily be rewritten in VB (with all of the marshalling) as shown below.
Imports System.Runtime.InteropServices
Dim obj As Object = e.Data.GetData(DataFormats.Dib)
Dim stream As System.IO.MemoryStream = CType(obj,
System.IO.MemoryStream)
If (Not stream Is Nothing) Then
Dim img As Byte() = stream.ToArray()
Dim p As IntPtr = Marshal.AllocCoTaskMem(Marshal.SizeOf(img(0))
* img.Length)
Marshal.Copy(img, 0, p, img.Length)
Try
PictureBox1.Image = TwainGui.DibToImage.WithStream(p)
Finally
Marshal.FreeCoTaskMem(p)
End Try
End If
Your's would simply begin with
Dim obj as Object = GetDIB(ByRef DIBObj as Integer)
The only thing left to do is convert the "TwainGui.DibToImage.WithStream"
function from C# to VB.NET. This can be downloaded in a ZIP file referenced
in the thread. If you have trouble converting it then post your problems
here. If I've misunderstood the problem, feel free to correct me or provide
more information.
Scott
"Sueffel" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
> This will not help. I have a function, the prototype is "GetDIB(ByRef
> DIBObj as Integer)"
> That, and all the marshelling, VB.NET can't do.
>
> Thanks,
> Sueffel
>
> "Scott" <(E-Mail Removed)> wrote in message
> news:(E-Mail Removed)...
> > Check out this thread...
> >
> >
>
http://www.google.com/groups?q=dataf...phx.gbl&rnum=4
> >
> >
> > "Sueffel" <(E-Mail Removed)> wrote in message
> > news:(E-Mail Removed)...
> > > I'm sure this has been asked, but I cannot fid it. I have a DLL (Not
> > mine,
> > > 3rd party) and the documentation simply says "Return DIB". Well,
since
> > this
> > > sucker was made with C++, I'm at a complete loss. Basically, this
> sucker
> > > returns the pointer to the DIB as an Object, which is odd on me. So,
I
> > need
> > > to load this thing into a picturebox and display it, then maybe save
it
> > > later. I also may need to load picture from file and throw it as a
DIB
> > > back into this DLL. If someone wants to walk me through it, I could
> even
> > > post whatever structure this thing is returning. There's alot of
> > unknowns,
> > > and graphics is my least favorite subject (reqiures too much thought).
> > >
> > > Thanks in advance,
> > > Sueffel
> > >
> > >
> >
> >
>
>
