Q49390: Example of Passing Numerics from MASM to BASIC

Article: Q49390
Product(s): See article
Version(s): 4.00 4.00b 4.50
Operating System(s): MS-DOS
Keyword(s): ENDUSER | B_BasicCom H_MASM S_QuickASM | mspl13_basic
Last Modified: 13-AUG-1990

The two programs shown below demonstrate how Microsoft assembly
language can pass common numeric types to BASIC subprograms.

This information about interlanguage calling applies to QuickBASIC
versions 4.00, 4.00b, and 4.50 for MS-DOS, to Microsoft BASIC Compiler
versions 6.00 and 6.00b for MS-DOS and MS OS/2, and to Microsoft BASIC
Professional Development System (PDS) versions 7.00 and 7.10 for
MS-DOS and MS OS/2.

For more information about passing other types of parameters between
BASIC and MASM, search in the Software/Data Library for the following
word:

   BAS2MASM

Code Example
------------

The following BASIC program is BNUM.BAS, which contains subprograms
that receive common numeric types passed from assembly language:

   DECLARE SUB AssemSub(dummy AS INTEGER)

   CALL AssemSub(dummy%)
   END

   SUB NumInt(i AS INTEGER)
      PRINT "Integer : "; i
   END SUB

   SUB NumLong(l AS LONG)
      PRINT "Long    : "; l
   END SUB

   SUB NumSingle(s AS SINGLE)
      PRINT "Single  : "; s
   END SUB

   SUB NumDouble(d AS DOUBLE)
      PRINT "Double  : "; d
   END SUB

The following program is ANUM.ASM, which passes common numeric types
to BASIC subprograms:

; The following handy .MODEL MEDIUM,BASIC directive is found in MASM
; 5.10 but not in earlier versions:
.MODEL MEDIUM, BASIC
EXTRN NumInt:PROC        ; declare BASIC procedures
EXTRN NumLong:PROC
EXTRN NumSingle:PROC
EXTRN NumDouble:PROC
.DATA
  intnum    DW 32767              ; initialize data
  Longnum   DD 37999
  Singlenum DD 123.45
  Doublenum DQ 1234.14159
.CODE
         PUBLIC AssemSub
AssemSub PROC
         push bp
         mov bp, sp

         mov ax, OFFSET intnum    ; get address of integer
         push ax
         call NumInt

         mov ax, OFFSET Longnum   ; get address of long
         push ax
         call NumLong

         mov ax, OFFSET Singlenum ; get address of single
         push ax
         call NumSingle

         mov ax, OFFSET Doublenum ; get address of double
         push ax
         call NumDouble

         pop bp
         ret 2
AssemSub ENDP
         END

To demonstrate these programs from an .EXE program, compile and link
as follows:

   BC BNUM.BAS;
   MASM ANUM.ASM;
   LINK BNUM ANUM;

BNUM.EXE produces the following output:

   Integer : 32767
   Long    : 37999
   Single  : 123.45
   Double  : 1234.14159

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.

Copyright Microsoft Corporation 1986-2002.