Release 10.1A: OpenEdge Development:
Programming Interfaces

> ## Loading and unloading shared libraries

> Progress provides several options for loading and unloading shared libraries. If you want Progress to automatically load and unload a shared library each time you invoke it, use the `PROCEDURE` statement without the `PERSISTENT` option. If you want Progress to automatically load a shared library and keep it loaded, use the `PROCEDURE` statement with the `PERSISTENT` option. To manually unload a shared library, use the `4GL RELEASE EXTERNAL` statement.

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