### Error Handling and Testing Classes

These classes provide support for signaling and handling error conditions that occur in applications and for testing applications under development.

IAccessError
IAlreadyExists
IArgumentDictionary
IAssertionFailure
IBaseErrorInfo
ICannotProceed
ICLibErrorInfo
IComparisonTestOf
IConditionInvalid
IDeviceError
IException
IException::TraceFn
IExceptionLocation
IGUIErrorInfo
IInvalidName
IInvalidParameter
IInvalidRequest
IMessageText
IMustBeEmpty
IObjectNotFound
IOutOfMemory
IOutOfSystemResource
IOutOfWindowResource
IResourceExhausted
IStartStopTimingTest
IStreamTestOf
ISystemErrorInfo
ITest
ITestCollection
ITestMultiplexer
ITieredTextBuffer
ITimingTest
ITimingTestStopwatch
ITrace
IXLibErrorInfo