Int 15 Fn 12  - Topview - Send Message - "addto" - Write Chars And Attrib  [Q]

   AH = 12h
   BH = 0Ah
   BL = window to write to
       00h window handle is DWORD on top of stack
       01h current task's default window
       0Ch (DV 2.26+) default window of task owning handle on top of stack
       0Dh (DV 2.26+) default window of parent of current task
   STACK:  DWORD count of attributes
       DWORD address of attribute string
       DWORD count of characters
       DWORD address of character string

Notes: if one string is longer than the other, the shorter one will be reused
     until the longer one is exhausted
   the cursor is left just after the last character written

See Also: AH=12h/BH=0Bh"WINDOW"