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Checksum 16 File Function
File Operations Class

Public Function Checksum16File( _
    ByVal vFileName As Variant _
    ) As Variant

"16-bit File Checksum"
Finds the 16-bit checksum of a file.
The checksum is the sum of the ASCII values of all of the characters within the file.
Checksum is returned as a Long (Integer) value between 0 and 65,536.
Uses modulo addition so that the function will return the 16 least significant bits of the sum.

Example: 
    Assuming
       Checksum16("ABCD") = 266
       StringToFile("ABCD", "C:\Test.Out") = True
    for example
       Checksum16File("C:\Test.Out") = 266
See also: 
    Checksum16 Function
    Checksum8File Function
    Checksum32File Function
vFileName: Name of the file for which the checksum will be calculated. Function returns Null if vFileName is Null or cannot be fixed-up to a string. Function returns Null if there is any type of error, such as when the file does not exist.

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