Microsoft KB Archive/49400

= Example of Passing Two-Dimensional Fixed-String Array to MASM =

Article ID: 49400

Article Last Modified on 8/16/2005

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APPLIES TO


 * Microsoft QuickBasic 4.0
 * Microsoft QuickBASIC 4.0b
 * Microsoft QuickBasic 4.5 for MS-DOS
 * Microsoft BASIC Compiler 6.0
 * Microsoft BASIC Compiler 6.0b
 * Microsoft BASIC Professional Development System 7.0
 * Microsoft BASIC Professional Development System 7.1

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This article was previously published under Q49400



SUMMARY
The two programs shown below demonstrate how a Microsoft Basic program can pass a two-dimensional fixed-length string array to assembly language.

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 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 BTWOFIX.BAS, which passes an uninitialized two-dimensional array of fixed-length strings to an assembly routine that initializes the array: 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: ; The following handy .MODEL MEDIUM,Basic directive is found in MASM .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       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 movsb               ; copy string data to array 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
 * 5.10 but not in earlier versions:

Additional query words: QuickBas BasicCom

Keywords: KB49400

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