Passing Structs to DLL in LabVIEW

[lorman]

I was wondering if anyone out there has used WinSock in LabVIEW. Most of the functions require you to pass in structs suck as Socket, SockAddr and others. While I can open and see the contents of the struct, I am unclear as to how to create them in LabVIEW to call the DLLs. Any ideas will be greatly appretiated.

Thanks

Eugene

[Labviewguru]

Eugene,

While I haven't used Winsock, I have used DLLs, and am familiar with using structures to some extent.

If you could advise what DLL you are calling, what function, etc, I can probably show you how to setup the dll for use in LabVIEW.

Post it here, or just email me.

[Labviewguru]

Eugene,

While I haven't used Winsock, I have used DLLs, and am familiar with using structures to some extent.

If you could advise what DLL you are calling, what function, etc, I can probably show you how to setup the dll for use in LabVIEW.

Post it here, or just email me.

[lorman]

I am using the WinSock dll that comes with windows 2000. I will attach the file here. There are some good descriptions on how to use in on the microsoft website at http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/wsapiref_7v1u.asp

The things that I am having problems with the most if trying to figure out what all of the structs that they use to call the function are.

I am ataching the file here as well.

THanks

Eugene

[huaifenzi]

i am doing such things ,and when i include winsock2.h,cvi hints that redeclaration in winsock2.h.later i use vc++6.0 to create a dll,int the functions i can use "Socket, SockAddr and others" because i include "winsock2.h",but in cvi i do not use them.Now cvi can call the functions in the lib generated from the dll using the "Options\Generate Dll Import Library",but the value returned alwsays is 10038(in vc++ Error Codes ,you can find it refer to "WSAENOTSOCk").who can help me with the question?

[cktears]

You may have to look up Windows Platform SDK where all the structures are defined and explained. Such as:
struct sockaddr {
u_short sa_family;
char sa_data[14];
};
struct sockaddr_in {
short sin_family;
u_short sin_port;
struct in_addr sin_addr;
char sin_zero[8];
};
typedef struct _SOCKET_ADDRESS {
LPSOCKADDR lpSockaddr ;
INT iSockaddrLength ;
} SOCKET_ADDRESS, *PSOCKET_ADDRESS, FAR * LPSOCKET_ADDRESS ;
and many other structures. Are they what you wanted?