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Loading bitmap portions

totalitary
totalitary asked
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Last Modified: 2010-04-30
Lets say you have a really large bitmap file, one too large to completely load into the computer's memory.  Can you load and display only a selected area of the bitmap without loading the rest of the bitmap into the computer's memory?
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First, no bitmap is too large to fit in computer's memory. Even if it's 1600x1200x24 colors, it won't take more then 6MB. IF you just want to display part of it, you can load it to a hidden picture box, and then use PaintPicture to transfer part of it to another box or form. If you still want to read only part of it, you will have to do that manualy, there's no built in way for it

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Commented:
The image is 6ft by 4ft so its not possible to load it into memory without waiting 30 minutes.
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Commented:
Does anyone know the BMP header stucture and how would you tranfer the information from the chosen bytes to the screen?
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