EDais :: Tutorials :: DDB tutorial
Using Device Dependant Bitmaps (DDBs) in Visual Basic
Written by Mike D Sutton
EDais@mvps.org
- 21.09.2003 -
Introduction:
A Device Dependant Bitmap (DDB) is a GDI object managed by the system, which is used to interface with image data. DDBs are used throughout the system for drawing image data to the screen since they can be processed and managed more efficiently than their cousin, the DIBSection. The reason for this is that their image data is allocated and managed by the GDI and device drivers, which gives them faster access for drawing to or from the object.
Rather than getting too caught up in the mechanics of how these objects work, lets jump straight into coding with them and see how they can be used in our own applications.
Chapter index:
- Chapter 1: A simple introduction to DDBs
- Chapter 2: The 'special case' DDB
- Chapter 3: Working with DDBs
- Chapter 4: Working up a DDB class
- Chapter 5: Adding more functionality to the class
- Chapter 6: Making the class a little more dynamic
- Chapter 7: Using DDBs with the Clipboard
You can download this tutorial to disk for easier viewing offline as an Adobe Acrobat PDF:
And the code for all the chapters:
