FileMaker Pro Custom Functions

/*------------------------------------------------------- Checks if bitnumber 'bit' in value 'value' is on or off The first bitnumber in a value is 0 For a value = 1, bitnumber 0 is ON For a value = 2, bitnumber 0 = OFF, bitnumber 1 = ON Syntax: BitTest ( value ; bit ) Returns True (1) if the bit is ON, False (0) if not. Return type: Number (boolean) Theo Ros ----------------------------------------------------------*/ If ( value = 0 ; False ; // bail out if value is zero // get the base 2 logarithm of value, which is the highest possible bitnumber Let ( [ hibit = Int ( Lg ( value ) ) ; bit = Int ( bit ) ] ; Case ( bit > hibit ; False ; bit = hibit ; True ; BitTest ( value - 2 ^ hibit ; bit ) ) ) )
 Then copy & paste into FileMaker Advanced's Edit Custom Function window.