Converts a string into a quad numeric value. The string may be an integer in decimal, hexadecimal (with '$' prefix) or binary (with '%' prefix) format. The number parsing stops at the first non numeric character.
The numeric value of the string.
Strings holding a 32-bit floats may be converted with ValF() and 64-bit floats with ValD().
Debug Val("1024102410241024") ; will print '1024102410241024'.
Debug Val("$10FFFFFFFF")      ; will print '73014444031'.
Debug Val("%1000")            ; will print '8'.