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 C_ALLALPHA()

 DESCRIPTION

 C_ALLALPHA() checks a character string to determine if it contains
 only upper or lower case alphabetic characters (A-Z, a-z).  The
 alphabetic characters checked are ASCII 65 through 90 and ASCII 97
 through 122.

 SYNTAX

 C_ALLALPHA(string)

 PARAMETERS

 string (C) is the character string to check.

 RETURNS

 C_ALLALPHA() returns true (.T.) if all characters in the string are
 alphabetic, otherwise false (.F.).

 EXAMPLES

 ? c_allalpha("AbcDef")  --> .T.
 ? c_allalpha("Abcef1")  --> .F.       && Contains number 1
 ? c_allalpha("Abcdef ") --> .F.       && Contains a space
 ? c_allalpha("Abcdef.") --> .F.       && Contains a period