Resizing an image?

[Maarten Lankhorst]

I'm trying to resize a raw image (only rgb values) and flipping it 
vertically
i got 2 pointers, and the size

they are both rgb24

I wanted to do this with stretchdibits, but it requires a device 
context, and I am not sure that if i create one with createcompatibledc, 
it will be 24 bits.. so my question is how can i resize a raw dib image, 
where input = pointer1 and output = pointer2? preferably tilting it too