QUICBASIC 4.5 Program now in QB64 - date

Question

I took a QB45 application and produced a QB64 application from it over 100,000 lines of code. All the pricing was hard coded in the program so I started reading from CSV files but now I need the date from the CSV file without putting a directory to a text file and reading for the date. I found this code below
The problem when I run it is that the assembler is for 16 bit registers and I am using 32 or 64 with windows 7 and i5 core. Can anyone help me to figure out how the date will be returned in a longer int value from the register?
'===========================================================================
' Subject: GET/SET FILE DATE/TIME Date: Unknown Date (00:00)
' Author: Matt Hart Code: QB, PDS
' Keys: GET,SET,FILE,DATE,TIME Packet: DOS.ABC
'===========================================================================
' FILEDATE.BAS by Matt Hart
'
' Gets or sets a file date/time
'
' GetFileDateTime returns the Date in MM-DD-YYYY format
' and the Time in HH:MM:SS
' SetFileDateTime expects the Date and Time in the same formats
'$INCLUDE: 'QB.BI' ' Use your path to QB or QBX.BI
DEFINT A-Z
DECLARE SUB GetFileDateTime (F$, Dat$, Tim$, Ecode%)
DECLARE SUB SetFileDateTime (F$, Dat$, Tim$, Ecode%)
' ------------------------- Sample code
F$ = LTRIM$(RTRIM$(COMMAND$))
CALL GetFileDateTime(F$, Dat$, Tim$, Ecode)
IF NOT Ecode THEN
PRINT F$; " date is "; Dat$
PRINT F$; " time is "; Tim$
ELSE
PRINT "1 Error = "; Ecode
END
END IF
NewTim$ = "01:01:02"
NewDat$ = "02-02-1980"
CALL SetFileDateTime(F$, NewDat$, NewTim$, Ecode)
IF Ecode THEN
PRINT "2 Error = "; Ecode
END
END IF
CALL GetFileDateTime(F$, Dat$, Tim$, Ecode)
IF Ecode THEN
PRINT "3 Error = "; Ecode
END
END IF
PRINT F$; " new date is "; Dat$
PRINT F$; " new time is "; Tim$
CALL SetFileDateTime(F$, Dat$, Tim$, Ecode)
IF Ecode THEN
PRINT "4 Error = "; Ecode
END
END IF
END
' ------------------------------------
SUB GetFileDateTime (F$, Dat$, Tim$, Ecode)
Ecode = 0
DIM InRegs AS RegTypeX
DIM OutRegs AS RegTypeX
InRegs.ax = &H3D00 ' Open file function
DIM FileName AS STRING * 128 ' Use fixed length
FileName = F$ + CHR$(0) ' Must be ASCIIZ string
InRegs.ds = VARSEG(FileName) ' Fixed length makes these
InRegs.dx = VARPTR(FileName) ' come out right
CALL INTERRUPTX(&H21, InRegs, OutRegs) ' Open the file
IF NOT OutRegs.flags THEN ' No error
Handle = OutRegs.ax ' Save DOS file handle
InRegs.ax = &H5700 ' Get date/time function
InRegs.bx = Handle
CALL INTERRUPTX(&H21, InRegs, OutRegs)
HMS& = OutRegs.cx ' Use long integer for
IF HMS& < 0& THEN HMS& = 65536 + HMS& ' positive numbers
Hours = HMS& \ 2048& ' Hours is first 5 bits
Minutes = (HMS& AND 2047&) \ 31& ' Minutes is next 6 bits
Seconds = HMS& AND 31& ' Seconds is last 5 bits
H$ = LTRIM$(STR$(Hours))
M$ = LTRIM$(STR$(Minutes)): IF LEN(M$) = 1 THEN M$ = "0" + M$
S$ = LTRIM$(STR$(Seconds)): IF LEN(S$) = 1 THEN S$ = "0" + S$
Tim$ = H$ + ":" + M$ + ":" + S$
YMD& = OutRegs.dx ' Long int here too
IF YMD& < 0 THEN YMD& = 65536 + YMD& ' Convert to + if needed
Year = 1980& + YMD& \ 512& ' Year is first 7 bits
Month = (YMD& AND 511&) \ 31& ' Month is next 4 bits
Day = YMD& AND 31& ' Day is last 5 bits
Y$ = LTRIM$(STR$(Year))
M$ = LTRIM$(STR$(Month))
D$ = LTRIM$(STR$(Day)): IF LEN(D$) = 1 THEN D$ = "0" + D$
Dat$ = M$ + "-" + D$ + "-" + Y$
InRegs.ax = &H3E00 ' Close file function
InRegs.bx = Handle
CALL INTERRUPTX(&H21, InRegs, OutRegs) ' Close it
ELSE
Ecode = OutRegs.flags ' Otherwise return error flags
END IF
END SUB
SUB SetFileDateTime (F$, Dat$, Tim$, Ecode)
Ecode = 0
DIM InRegs AS RegTypeX
DIM OutRegs AS RegTypeX
InRegs.ax = &H3D00
DIM FileName AS STRING * 128
FileName = F$ + CHR$(0)
InRegs.ds = VARSEG(FileName)
InRegs.dx = VARPTR(FileName)
CALL INTERRUPTX(&H21, InRegs, OutRegs)
IF NOT OutRegs.flags THEN
Handle = OutRegs.ax
InRegs.ax = &H5701
InRegs.bx = Handle
Hours& = VAL(LEFT$(Tim$, 2)) * 2048&
Minutes& = VAL(MID$(Tim$, 4, 2)) * 32&
Seconds& = VAL(RIGHT$(Tim$, 2)) \ 2
HMS& = Hours& + Minutes& + Seconds&
IF HMS& > 65536 THEN
InRegs.cx = 65536 - HMS&
ELSE
InRegs.cx = HMS&
END IF
Year& = (VAL(RIGHT$(Dat$, 4)) - 1980&) * 512&
Month& = VAL(LEFT$(Dat$, 2)) * 32&
Day& = VAL(MID$(Dat$, 4, 2))
YMD& = Year& + Month& + Day&
IF YMD& > 65536 THEN
InRegs.dx = 65536 - YMD&
ELSE
InRegs.dx = YMD&
END IF
CALL INTERRUPTX(&H21, InRegs, OutRegs)
InRegs.ax = &H3E00
InRegs.bx = Handle
CALL INTERRUPTX(&H21, InRegs, OutRegs)
ELSE
Ecode = OutRegs.flags
END IF
END SUB