TABLE OF CONTENTS The CFObject is a data container object that is used throughout the QuickTime Object Model, especially for complex data sets. It can contain data in a variety of formats from primitive types such as simple numbers or strings to more complex structures such as an array or dictionary, or even just raw bytes. Table 5.7 provides a summary.
| CFObject Type | Contains |
|---|---|
| CFObjectTypeBoolean | True or False |
| CFObjectTypeNumber | Integer or floating-point number |
| CFObjectTypeString | String |
| CFObjectTypeArray | Array of CFObject |
| CFObjectTypeDictionary | Dictionary of key-value pairs. Key may be integer or string. Value may be any CFObject. |
| CFObjectTypeData | Raw data (i.e., bytes) |
| CFObjectTypeInvalid | Nothing |
If you have a CFObject, you can find out what type it is (or, more precisely, what type of data it contains) by examining its Type property. This will return one of the types listed in CFObjectTypesEnum, as shown in Table 5.7.
If the CFObject is a Boolean, Number, or String, you can get its value using the (default) Value property, which simply returns the value as a System.Object in .NET or Variant in VB6.
The CFObject is not just a read-only object. It is also possible to create a CFObject and put data into it. The following code snippet shows how to create a CFObject and use it with the primitive CFObject types:
Dim cf...
