Help with Texture Manipulation

And there I just learned something! Thank you Stevie! I was unaware that you could lock more than one buffer at a time! I thought that the last called lock command was the one that was active and any previous ones were automatically 'unlocked' as the new one was called.

I just tried locking both buffers and the program ran without the "memory access violation" error I've been getting. The results were not what I wanted, but at least I got to the point where I could see something without the error!

I'll tinker with this a bit more and see if I can now make some head way.

Thanks a million for helping me out :)