You use the ampersand (&) to "and" a flag with your value.
Example:
SuperStrict
Const flag_1:Int = $01
Const flag_2:Int = $02
Const flag_4:Int = $04
Const flag_8:Int = $08
Const flag_16:Int = $10
Const flag_32:Int = $20
Const flag_64:Int = $40
Const flag_128:Int = $80
Function which_flag_is_set:String(myFlag:Int)
Local s:String = "Flags (" + myFlag + ") : "
If myFlag & flag_1 s:+ " 1,"
If myFlag & flag_2 s:+ " 2,"
If myFlag & flag_4 s:+ " 4,"
If myFlag & flag_8 s:+ " 8,"
If myFlag & flag_16 s:+ " 16,"
If myFlag & flag_32 s:+ " 32,"
If myFlag & flag_64 s:+ " 64,"
If myFlag & flag_128 s:+ " 128,"
Return s
End Function
Print which_flag_is_set(17) + "~n"
Print which_flag_is_set(102) + "~n"
Print which_flag_is_set(128) + "~n"
Print which_flag_is_set(255)
Binary arithmetic states that when you And to bits together, the result is 1 only if both bits are 1.
flag_8 = 1000 (in binary)
the number 9 = 1001 (in binary).
To find if flag_8 is set in your number, & them :
1000
& 1001
------
1000
If the result is not zero, the flag is set
HTH
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