# checksum8, checksum8file

Calculates the 8bit-checksum of a string or a file.

    checksum8 <intvar> <string>
    checksum8file <intvar> <filename>

## Remarks

This macro function calculates the checksum(8bit) of a string or a file.
The calculated value stores the variable "intvar" as mathematical value.
If the <filename> file can not open by using checksum8file, the system variable "result" is set to -1.

## Example

    str = 'this is a test string to be checksum8ed'
    checksum8 crc str

    ; Display checksum8 result asHEX
    sprintf '0x%08X' crc
    messagebox inputstr 'checksum8 = '

    checksum8file crc 'foo.bin'
    if result = -1 then
        messagebox 'file open error' 'checksum8 = '
    else
        sprintf '0x%08X' crc
        messagebox inputstr 'checksum8 = '
    endif