Bitmaps
Bitmaps are blocks of pixel data that can be output directly to a device, such as a video display. They can be thought of as a way to store the pixel data directly from the screen into a memory buffer. Painting bitmaps onto the screen is much faster than using GDI functions like Rectangle and LineTo. The drawbacks to bitmaps are that they take up a lot of memory and disk space, and they do not scale well, especially if they contain text. When you scale a bitmap, it loses quality and distorts the text.
Windows provides two types of bitmaps: the device-dependent bitmap (DDB) and the device- independent bitmap (DIB). The device-dependent bitmap is an older format that is, as its name implies, less flexible than the device-independent bitmap. ...
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