Very Computer

1. Need some help on memory image conversion using GDI Image class.

I have a jpeg image loaded into a C++ memory pointer.  I would like to be
able to attach this memory pointer to an Image class and perform a
conversion to another memory pointer using the Image::Save method.

Since the Image class manipulates data through IStreams, I need to assign an
IStream to my memory pointers.  This is where I am confused.  The only way
that I can figure out how to attach an IStream to a memory pointer is via
CreateStreamOnHGlobal() function.  However, I am not sure that I can just
obtain an HGLOBAL from any memory pointer using GlobalHandle() function if
it did not originate from a GlobalAlloc().

I do not want to have to create an additional global memory block just so
that I can attach a stream to it.  I would rather use my existing memory
blocks.

So basically, I am asking if someone can please tell me the proper way to
attach an IStream to a standard C++ pointer?

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Ken Varn
Senior Software Engineer
Diebold Inc.

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