Which manual contains information for the statements in the code excerpt below, please?

TIA... Mike

Code:
;----------------------Strings------------------------------------
LCDSTR?CBB  macro Xin ,Yin ,Bin
    MOVE?CB Xin , _POSX
    MOVE?BB Yin , _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm         
LCDSTR?CCB  macro Xin ,Yin ,Bin
    MOVE?CB Xin , _POSX
    MOVE?CB Yin  ,_POSY
    MOVE?CB high (Bin), FSR1H ;load highbyte 
    MOVE?CB low  (Bin), FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm              
LCDSTR?BBB  macro Xin ,Yin ,Bin
    MOVE?B  Xin, _POSX
    MOVE?B  Yin, _POSY
    MOVE?CB high Bin, FSR1H ;load highbyte 
    MOVE?CB low  Bin, FSR1L ;load low byte
    L?CALL  GLCD_str_out
    endm