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num-var = Get_Gbl_Num([TblNum,]key-str)
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Operands:
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TblNum
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Optional. The sub-table number to be searched. If omitted, zero is assumed.
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key-str
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the desired key for which the associated value is desired.
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Returns:
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Returns the requested value to num-var. If the key-str is invalid / not found, zero (0) is returned.
A successful retrieval will set RC to 0 and Msg$ will be "" (Null)
An unsuccessful retrieval, will set RC to 8 and Msg$ to an error message.
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