INT 15 - DESQview v2.40+ - "GETDVPATH" - GET DESQview DIRECTORY
	AX = DE25h
	ES:DI -> 67-byte buffer for ASCIZA NUL-terminated ASCII string.	The ASCIZ string "ABC" consists of the four bytes 41h, 42h, 43h, and 00h.  Unless otherwise specified, maximum lengths given in the interrupt list do not include the terminating NUL. directory name
Return: ES:DI buffer filled with directory from which DESQview was started
BUG:	DV 2.42 does not place a terminating NUL at the end of the directory
	  name, so if the buffer is not cleared to zeros before the call,
	  there is no way to tell where the directory name ends.  This bug
	  has been fixed in DV 2.52 (DV/X 1.02)
SeeAlso: AX=DE2Eh,INT 21/AH=47h