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Inside Macintosh: QuickDraw GX Environment and Utilities /
Chapter 6 - Message Manager / Message Manager Reference
Constants and Data Types

Message Manager Gestalt Selector

The Gestalt selector 'mess' can be used to determine which version, if any, of the Message Manager is installed.

enum {
   gestaltMessageMgrVersion = 'mess'
};
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7 JUL 1996

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