Conference abbott::visual_basic

2547.0. "How to Pass Integer arrays and arrays of strings from Vb to DLL" by ZPOVC::VBALA () Fri May 02 1997 02:19

    
    Hi,
    
    	I am facing problems in passing arrays of integers and
    	strings from VB to DLL. Any information regarding this will
    	be appreciated.
    
    	In VB 
    	------
    
    	Dim a(20) as long
    	Dim str(20) as string *80
    
        status = foo(a(0),str(0))
    
        Declaration in VB
    	-----------------
    
    	Declare function foo lib "mydll" (byref a() as long,
    					  byref str() as string) as long
    
    
        IN DLL
        ------
    
        int FAR PASCAL foo(int *a[], char *str[][80])
        {
    
           *a[0]=20;
           *a[1]=30;
    
           strcpy(str[0],"FIRST");
           strcpy(str[1],"SECOND");
    
           return 0;
       }
    
    I tried to run the above program in VB and it was not successful.
    
    
    Thanks in Advance,
    
    Bala
    
    

    Bala, both the problems in writing DLLs in other languages to supply
    routines to be called from VB and the particular problems concerned
    when you try and pass strings to routines in such DLLs have been
    covered extensively in this conference. All you need to do is search
    for them.
    
    Cheers,
    Brian