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dfIsUpper()
Determines if a string is in upper case
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Syntax:

     dfIsUpper(<cStr>) --> lUpper

Parameters:

     <cStr>     String to control

Returns:

     <lUpper> If .T. the String is in upper case

Description:

     Permits to control a defined sequence of characters to be displayed in
     upper case.

Example:

     ? dfIsUpper( "dBsee")   // Returns .F.
     ? dfIsUpper( "DBSEE")   // Returns .T.

See also:

     dfIsLower()