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# The Support Classes

We begin with the set of types, classes and functions that underlie the entire SDK. These do not provide any specific imaging functionality, but they are used as primitives for all the other classes that follow in subsequent chapters.

The names of the types, classes, etc. described in this chapter are generally prefixed with the letters “LT”. The corresponding header files can be found in the include directory.

Examples of the use of many of these classes can be found in the examples directory and in the Reference Manual.

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Preprocessor Constants and Basic Typedefs

Status Strings

The LTIFileSpec Class

Streams