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 Example of Passing User-Defined Type from MASM to Basic - Q49394
 
 The two programs below demonstrate how Microsoft assembly language can
 pass a user-defined type to Basic.
 
 More Information:
 
 The following Basic program is BUTYPE.BAS, which receives a
 user-defined type from an assembly language program and prints it out.
 
 Code Example
 ------------
 
 DEFINT A-Z
 DECLARE SUB MasmSub
 
 TYPE mixed
    i AS INTEGER
    lng AS LONG
    s AS SINGLE
    d AS DOUBLE
    fx AS STRING * 19
 END TYPE
 
 DIM dummy AS mixed
 
 CLS
 PRINT "Calling assembly routine which will fill the";
 PRINT " user-defined type."
 CALL MasmSub
 END
 
 SUB BASICSub (dummy AS mixed)
 
    PRINT "Values in user-defined type:"
    PRINT
    PRINT "Integer: ", dummy.i
    PRINT "Long: ", dummy.lng
    PRINT "Single: ", dummy.s
    PRINT "Double: ", dummy.d
    PRINT "fixed-length String: ", dummy.fx
 
 END SUB
 
 The following program is AUTYPE.ASM, which builds a user-defined type
 and passes it to Basic:
 
 .MODEL MEDIUM
         usrdefType STRUC
                    iAsm  DW 10
                    lAsm  DD 43210
                    sAsm  DD 32.10
                    dAsm  DQ 12345.67
                    fxAsm DB 'Fixed-length string'
         usrdefType ENDS
         EXTRN BASICSub:PROC
 .DATA
         BASICRec usrdefType <>
 .CODE
 
         PUBLIC MasmSub
 MasmSub PROC                     ; No stack frame is needed
                                  ;   because no arguments are
                                  ;   passed to assembly.
         mov ax, OFFSET BASICRec  ; Get address of structure.
         push ax                  ; Pass it as argument to Basic.
         CALL BASICSUb
         ret
 MasmSub ENDP
         END
 
 To demonstrate these programs from an .EXE program, compile and link
 as follows:
 
    BC BUTYPE.BAS;
    MASM AUTYPE.ASM;
    LINK BUTYPE AUTYPE;
 
 BUTYPE.EXE produces the following output:
 
      Integer:   10
      Long:      43210
      Single:    32.1
      Double:    12345.67
      fixed-length String:  Fixed-length string