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StrToLong -- string to long value (decimal) (V36)
characters = StrToLong(string,value)
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LONG StrToLong(STRPTR, LONG *)
Converts decimal string into LONG value. Returns number of characters
converted. Skips over leading spaces & tabs (included in count). If
no decimal digits are found (after skipping leading spaces & tabs),
StrToLong returns -1 for characters converted, and puts 0 into value.
string - Input string.
value - Pointer to long value. Set to 0 if no digits are converted.
result - Number of characters converted or -1.
Before V39, if there were no convertible characters it returned the
number of leading white-space characters (space and tab in this case).
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