Hey there. It's been awhile since I posted in the VB6 area. :bigyello:
I've recently been doing some heavy duty C++ programming lately, mostly in the DirectX area, and recently got into Winsock. So after getting an awesome server to client chit chat program through the console window, I was wanting to attempt this in VB6 just for kicks. However, I ran into an api that seems to have little to no results in Google. And that is getaddrinfo(). All the other examples in VB6 I ran into have been using gethostbyname() instead which have been deprecated, and has been widely recommended that you use getaddrinfo() instead. Anyways I don't wanna go to far into talking about winsock programming or this thread will end up moved to the networking thread. My concern is the conversion. How the C++ api getaddrinfo() is, is setup like this:
Now _In_opt_ would make it ByVal and _Out_ would be ByRef after researching that, however we got a lot of pointers going on here. PCSTR would be a pointer to a constant string, pHints is a pointer to the structure ADDRINFO along with ppResult. However online, the only time I ever saw getaddrinfo() declared in VB was from someone posting a problem in a forum, and he had it setup differently, and in my opinion totally wrong which is why it wasnt working for him:
http://www.solveerrors.com/forums/us...vb6-239905.asp
First of all, his ADDRINFO datatype is missing 2 declarations which the API is dependent on, along with another structure. But when I declare it, I obviously can't declare a variable as the structure its within in vb6:
Ok thats problem one that I'll need help in the conversion process to get the API to function properly.
Secondly is the API itself. He has it declared as this:
I cant but feel this is also wrong, cause the original C++ version consists of all pointers, whether its to a string or structure. And you also cant ByVal Hints As AddrInfo cause you are using a structure and VB6 wont allow it. Youll end up with an error saying "User Defined Type cannot be passed through ByVal." So I have this setup for the API which is kind of the same but doubt its correct, and I cant find anything else on it through Google:
When the API is used in C++ it looks something like this:
Which works great. And NULL if you put your mouse over it in Visual Studio shows #define NULL 0;. Now for the VB6 version, he did it differently which is why it failed for him, not to mention his string has a number instead of a string:
Now in my program I wrote in VB6, I did it differently:
And there was no 11003 and it passed, buuuuuuuut.....there was no result output because it remained 0 for everything. I saw this when I printed em out:
Which leads to the conclusion that something is setup wrong either in the API itself, or the user defined type due to the missing declaration, or both! How would I go about setting it up correctly so I can get getaddrinfo() working properly in VB6 since there is a lack of information regarding the API?
Hopefully I didnt make it too confusing for yall. :bigyello:
I've recently been doing some heavy duty C++ programming lately, mostly in the DirectX area, and recently got into Winsock. So after getting an awesome server to client chit chat program through the console window, I was wanting to attempt this in VB6 just for kicks. However, I ran into an api that seems to have little to no results in Google. And that is getaddrinfo(). All the other examples in VB6 I ran into have been using gethostbyname() instead which have been deprecated, and has been widely recommended that you use getaddrinfo() instead. Anyways I don't wanna go to far into talking about winsock programming or this thread will end up moved to the networking thread. My concern is the conversion. How the C++ api getaddrinfo() is, is setup like this:
Code:
typedef struct addrinfo {
int ai_flags;
int ai_family;
int ai_socktype;
int ai_protocol;
size_t ai_addrlen;
char *ai_canonname;
struct sockaddr *ai_addr;
struct addrinfo *ai_next;
} ADDRINFOA, *PADDRINFOA;
int WSAAPI getaddrinfo(
_In_opt_ PCSTR pNodeName,
_In_opt_ PCSTR pServiceName,
_In_opt_ const ADDRINFOA *pHints,
_Out_ PADDRINFOA *ppResult
);http://www.solveerrors.com/forums/us...vb6-239905.asp
First of all, his ADDRINFO datatype is missing 2 declarations which the API is dependent on, along with another structure. But when I declare it, I obviously can't declare a variable as the structure its within in vb6:
vb Code:
Ok thats problem one that I'll need help in the conversion process to get the API to function properly.
Secondly is the API itself. He has it declared as this:
vb Code:
I cant but feel this is also wrong, cause the original C++ version consists of all pointers, whether its to a string or structure. And you also cant ByVal Hints As AddrInfo cause you are using a structure and VB6 wont allow it. Youll end up with an error saying "User Defined Type cannot be passed through ByVal." So I have this setup for the API which is kind of the same but doubt its correct, and I cant find anything else on it through Google:
vb Code:
When the API is used in C++ it looks something like this:
C++ Code:
Which works great. And NULL if you put your mouse over it in Visual Studio shows #define NULL 0;. Now for the VB6 version, he did it differently which is why it failed for him, not to mention his string has a number instead of a string:
vb Code:
Now in my program I wrote in VB6, I did it differently:
vb6 Code:
And there was no 11003 and it passed, buuuuuuuut.....there was no result output because it remained 0 for everything. I saw this when I printed em out:
Code:
Print result.ai_family
Print result.ai_socktype
Print result.ai_protocol
'Output
'0
'0
'0Hopefully I didnt make it too confusing for yall. :bigyello: