Article ID: 49390
Article Last Modified on 10/20/2003
APPLIES TO
- Microsoft BASIC Professional Development System 7.0
- Microsoft BASIC Professional Development System 7.1
This article was previously published under Q49390
SUMMARY
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.
MORE INFORMATION
For more information about passing other types of parameters between Basic and MASM, search in the Microsoft Knowledge Base using 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
Additional query words: QuickBas BasicCom
Keywords: KB49390
