Problem with type conversion when DllImport

[nastoski]

Dear all,
While importing C++ dll in my C# application I’m experiencing following problem with last parameter sessionID
I’m experiencing a problem while doing

[DllImport("ClientLib.dll", EntryPoint="APIconnect", CallingConvention=CallingConvention.ThisCall)]
public static extern int APIconnect ([MarshalAs(UnmanagedType.LPStr)] string username, [MarshalAs(UnmanagedType.LPStr)] string password,[MarshalAs(UnmanagedType.LPStr)] string address,int port,[MarshalAs(UnmanagedType.LPStr)] string appid, [MarshalAs(UnmanagedType.U4)] uint sessionId);

with last parameter uint sessionID and error is shown:can not reference the object.
int connectRespond = APIconnect("test", "test", "testhost", 1112, "app4", 4);

The function in dll is declared as:

int APIconnect (const char *username,
const char *password,
const char *address,
int port,
const char *appid,
unsigned int *sessionID);

Can anybody help me and tell me how to Marshal unsigned int *sessionID?

Regards

Igor Nastoski

 

[earthandfire]

My knowledge of C++ is less than minimal, but doesn't [tt] unsigned int *sessionID[/tt] mean that sessionID holds a pointer to an unsigned int as opposed to actually being an unsigned int?


Hope this helps.

 

[JurkMonkey]

Unamanged Type U4?

You should be able to take that statement out and just put uint sessionID I think.

Could be wrong