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StretchBlt is a fairly robust API routine, but it seems to lose effectiveness when reducing large images (e.g. 800x600) to a much smaller size (e.g. 80x60).
Is there a more efficient routine that avoids aliasing effects and preserves the color pallete?
paintpicture is the vb version of it. I haven't figured out why it's faster than stretchblt, although i think you can fix the screwed stretch with setstretchbltmode, i haven't tested the changes in effectiveness. The blt method using Ddraw is probably the fastest way to stretch, but you would have to include DX7 lib in your project then.