lAnd( <K_MASK>, <nValue> ) -> <lIsBit> 
------------------------------------------------------------------------------


 PARAMETER:

  <K_MASK>      Is Constant value where all bits to be tested are set to
                TRUE 

  <nValue>      Is Target value that will be tested


 RETURNS:

  <lIsBit> will be TRUE if the result is non-zero, which means that at 
  least one set Bit of <K_MASK> was also set in <nValue>
          


 DESCRIPTION:

  This function lets you perform a logical AND with an integer bitmask and
  an integer value. The purpose is to test if one or more bits in <nValue>
  are set ( TRUE ).
  To do so, you have to provide a 'mask', which is normally a CONSTANT value
  where the appropriate bits are set to TRUE. Windows ( and FiveWin therefore )
  has a lot of binary Mask's ( known as the 'magic numbers' )
   
  Storing informations in BITS is very economic, as you can store 8 logical
  values in one Byte. Compare that to clippers logical, where you need
  14 bytes just to store one state !


  EXAMPLE:

  Lets say you want to know if Bit 4 is set in the byte nKeyFlag
  
        nKeyFlag    12      Binary  00001100
        MASK         8              00001000
        ------------------------------------
        12 AND 8 =   8              00001000

  which will return a TRUE, as the result of the logical AND is non-zero   


  SOURCE:

   SOURCE\FUNCTION\OR.C