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C4W_HiWord()
Return the high word of a long number
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Syntax
C4W_HiWord( <nValue> )   -->   nResult

Arguments
<nValue> is a numeric value (typically the nlParam from a
Windows message).

Returns
The returned value is the high word of the value, and is an
integer in the range 0-65535.

Description
In Windows, the nlParam value passed with a message sometimes
consists of two values joined together.  This function, and
the corresponding
C4W_LoWord(), can be used to separate the two values.

Example
n = 65536 * 2
? C4W_HiWord( n )        // Result: 2