getting the bytes of an image

i need to do some intense manipulation of an image/bitmap object, and i would like to outsource the heavy work to a c++ dll. the problem is, i'm having trouble finding a memory address to pass the dll as to where the data is really located (i assume it's in a bitmap format *fingers crossed*).

i've searched all over the web for hours to no avail... perhaps, you, the kind patrons of this forum know of a solution?

Haven't done it myself, but the graphic object IntPtr is probably what you want to pass along to the C++ functions...

thank you for your response.

a friend referred me to:
http://www.bobpowell.net/lockingbits.htm

and that site has provided what i needed to perform the task. thank you again for your contribution.