DIB Memory Access

I am using a Video Capture Control that will capture an image from a webcam. I want to be able to read this data pixel by pixel in the most efficient way possible. Right now the control is generating a VB Standard Picutre object which is then passed into VBAccelerators DIB Class which gives me access to the memory itself. I would like to be able to get into that memory without copying it as I only need to read the info not change it.
Is there a way to find out what memory space a hDIB handle points to and to extract the data in VB.

Thanks
Jason Schleifer