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:: Punctuation
The double colon (::) is a short-hand syntax for referencing constant named members of database object containers, for example dynamic ProDataSets, queries, temp-tables, and buffers.
The following rules will help you to decide whether to use dot, colon, or double colon syntax:
*
*
*
For example, if hBuff is a HANDLE to the Customer table, then hBuff:NAME returns the string "Customer", but hBuff::NAME returns the value of the NAME field for the current record in the hBuff Buffer, e.g. "Lift Line Skiing".
See also 
: Punctuation, . Punctuation

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