INT 2F - DR DOS 6.0 TaskMAX - GET/SET NUMERIC PASTE LEAD-IN                     
	AX = 270Fh
	CX = length of string (max 15 keystrokes, 0000h to get current string)
	DS:SI -> pasting lead-in string (character/scan-code pairs)
Return: ES:DI -> current lead-in string
Note:	the specified sequence of keystrokes is sent to the application before
	  every number in a numeric-mode spreadsheet paste
SeeAlso: AX=270Eh,AX=2710h,AX=2711h,AX=2713h