3.1.1.5.3 Value Resources and Animation
A value resource contains a single-typed value. The following are the data types for which there exist corresponding value resources:
DOUBLE
COLOR
POINT
RECT
SIZE
MATRIX
COLORTRANSFORM
These resources can be referenced by other resources to represent the value of some property. For example, a solid color brush resource contains a color value, but can also reference a color resource, in which case the value of the color resource defines the color of the brush.
Value resources are most useful for animations. An update message for a value resource is often smaller than an update message for other resources.