Can any one tell me how I can preview any size image very quickly. If you have used ACDSee32 you probably know what I talking about as that program preview/loads any size images very quickly.

NO I'm not trying to make my own verion of ACD it for a different purpos.

I added some file names/paths to a list view I want to be able to select a file by clicking it and preview it fast as possible.

I have already made this butt if I add a large image to the list and try to preview it It takes time.

NOTE: image must stay proporational.

Thanks in advance