how to get pixel values from IPictureDisp interface?

I'm working on a DLL which input and output are an IPictureDisp interface. I need do some algorithm on it. The question is: how can I get the pixel values from this interface?


thanks

To work on each pixel of the Image, the Image must be in DIB. If the Image not in DIB, better to conver tp DIB. It is better to search for DIB in this site. Here you will find lot of examples. Try with those; All the best.