BYREF in API Problem from VB to VC!

[Guest_imported]

So.. i need to send from VB6 a STRUCTURED ARRAY into a VC++ DLL!!

i just prepared this 2 file:

VB6 EXE FILE
------------
public type secondarr
value1 as long
value2 as long
end type

publit type strarr
superarr() as secondarr
value3 as long
end type

Private Declare Function tryout Lib &quot;<myc++lib>&quot; (Byref PArr as strarr) as long

public sub PassArray()
dim myarr(0) as starr
redim myarr(0).superarr(0)
myarr(0).value3=3
myarr(0).superarr(0).value1=1
myarr(0).superarr(0).value2=2
msgbox tryout(myarr(0))
end sub

VC
----
[this is a Dynamic-DLL]
[....]
//only function and struct here

[in h]
struct secondarr
{
int value1;
int value2;
};

struct strarr
{
secondarr* superarr;
int value3;
};

[in cpp]
int tryout(strarr * myarr)
{
return strarr[0].superarr[0].value1; // <-- don't work
return stratt[0].value3; // <-- work correctly...
};


...................

so where is the problem????

i need to read a substructired array but... in this case i only operate on first level of array....

any one has other solution???????

thx....

 

[Zyrenthian]

Try changing &quot;int&quot; to &quot;long&quot;. I tried to avoid passing pointers from VB to a C++ dll. I always ran into problems. I have to remember how i did it. If i think of it I will post again.

Matt

 

[Guest_imported]

if you change in VC all types from INT to LONG ....
the reselts it's the same :-((((

i suppose that the problem occur while attempting to recreate SUB-Structure DATA.......

thx anyway :-(