INT 33H 0016H: Save Mouse Status

 Expects: AX    0016H
          ES:DX address of mouse buffer to hold mouse status info
 Returns: ES:DX buffer contains data
    Info: This function loads the current set of mouse-support variables
          into a caller-supplied data area.  Use this call to save the
          state of the mouse in case you might need to restore it at a
          later time (e.g., upon popping up as a TSR or upon return of
          control after using DOS Fn 4b00H EXEC).

 Warning: Use INT 33H 0015H to obtain the size of the buffer to be passed
          in this call.  You must provide enough storage or the mouse
          support may overwrite important program variables or code.

   Notes: ■ The mouse-state buffer layout is not documented.

          ■ This fn is not supported by some non-Microsoft drivers,
            including some which claim full Microsoft compatibility.

See Also: INT 33H: Mouse Support
          Interrupts and BIOS Services