vbdpss.hlp (Table of Contents; Topic list)
Important Notice
The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.
Article Q49400
                                                 Contents  Index  Back
─────────────────────────────────────────────────────────────────────────────
                           Knowledge Base Contents  Knowledge Base Index
 
 Example of Passing Two-Dimensional Fixed-String Array to MASM - Q49400
 
 The two programs shown below demonstrate how a Microsoft Basic program
 can pass a two-dimensional fixed-length string array to assembly
 language.
 
 More Information:
 
 The following Basic program is BTWOFIX.BAS, which passes an
 uninitialized two-dimensional array of fixed-length strings to an
 assembly routine that initializes the array.
 
 Code Example
 ------------
 
 DECLARE SUB TwoFix(BYVAL ASeg AS INTEGER, BYVAL AOff AS INTEGER)
 
 DIM FixArray(1 TO 2, 1 TO 3) AS STRING * 9
 
 CALL TwoFix(VARSEG(FixArray(1, 1)), VARPTR(FixArray(1, 1)))
 FOR row% = 1 TO 2
    FOR col% = 1 TO 3
       PRINT FixArray(row%, col%)
    NEXT
 NEXT
 END
 
 
 The following program is ATWOFIX.ASM, which initializes a
 two-dimensional array of fixed-length strings passed from Basic:
 
 .MODEL MEDIUM, BASIC
 .DATA
         Fix11 DB 'String 11'  ; Allocate string data.
         Fix21 DB 'String 21'
         Fix12 DB 'String 12'
         Fix22 DB 'String 22'
         Fix13 DB 'String 13'
         Fix23 DB 'String 23'
 .CODE
         PUBLIC TwoFix
 TwoFix  PROC
         push bp
         mov bp, sp            ; Set stack frame.
         push es
         push si
         push di
         mov es, [bp+8]        ; Segment of string array.
         mov di, [bp+6]        ; Offset of string array.
         mov si, OFFSET Fix11  ; Get offset to string data.
         mov cx, 54            ; Length of all string data.
         rep movsw             ; Copy string data to array.
         pop di
         pop si
         pop es
         pop bp
         ret 4
 TwoFix  ENDP
         END
 
 To demonstrate these programs from an .EXE program, compile and link
 as follows:
 
      BC BTWOFIX.BAS;
      MASM ATWOFIX.ASM;
      LINK BTWOFIX ATWOFIX;
 
 BTWOFIX.EXE produces the following output:
 
 String 11
 String 12
 String 13
 String 21
 String 22
 String 23