MAPI Maximum Constants
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4/8/2010

These constants indicate the maximum number of bytes for MAPI Message Class names.

Constant	Value	Description
MAX_ONESTOP_TYPE_NAME	32	Not supported.
MAX_MESSAGE_CLASS_NAME	64	The maximum length a message class can be (for example, IPM.Note).
MAX_MESSAGE_CLASS_DISPLAY_NAME	64	The maximum length a display name associated with a message class can be (for example, "Email").
MAX_MESSAGE_CLASSES_SUPPORTED_STRING	1024	The maximum length a list of supported message classes for a transport can be (for example, "IPM.Note:IPM.SMSText").

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MAPI Constants

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