Using message filters in Windows Forms applications
An overview of how to use the `IMessageFilter` interface to intercept Windows Messages within your application.
In my previous articles on reading and writing colours from various palette/swatch formats, I left CMYK conversion as an exercise for the reader and only demonstrated RGB aspects. This article demonstrates how to convert colours in CMYK format to RGB and vice versa.
18-bit RGB palettes are an old format used by VGA displays of yesteryear. These palettes use 6-bits for each of the red, green and blue channels and usually allowed a maximum of 256 colours from the 262,144 unique colours available. This article describes how to read and write 18-bit palette files.
Recently I was looking for a way of display hierarchical information in a more compact form than the previous horizontal/vertical trees I was using. One of the concepts I looked into during this was the idea of arranging children radially around a central node. This article describes an approach for doing this using circular nodes.