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I am building a managed C++ wrapper DLL around an unmanaged C++ DLL that uses MFC CStrings in its public interface. The unmanaged C++ DLL contains a class that I need to access. My problem is that this class contains methods using CString references, such as:
void SetName(const CString& name);
How can I call this method from my managed C++ code?
I have tried this in my wrapper code:
void CMfcDllWrapper::SetName(System::String^ str)
{
CString s(str);
m_pUnmanaged->SetName(s);
}
where m_pUnmanaged points to the C++ object in the unmanaged DLL. However, this approach causes a linker error, so I am not using the correct signature for a CString reference.
An a similar example where the CString is passed by value everything works, but with pass by reference I am stuck.
PS: I am using VS2005
Can anyone give some advise , please?
Thanks
Bo
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CString has char* overloads. So you can try the following.
void CMfcDllWrapper::SetName(System::String^ str)<br />
{<br />
<br />
char __nogc* szStr = static_cast<char *>(Marshal::StringToHGlobalAnsi (str).ToPointer());<br />
m_pUnmanaged->SetName(szStr); <br />
Marshal::FreeHGlobal( IntPtr((void*)szStr) );<br />
<br />
}
cheers..mil10
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can anyone tell me how do we add a dll to our project?
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Hi,
i guess you were talking about a managed c++ dll and you would like to add it to a clr project in VS2005.
If so, then you'll have to do the following:
1. go to "Project->References", click on "Add Reference"
2. Browse to your dll and add it
3. reference the namespace of your dll
e.g.
<br />
using namespace MyDllNamespace;<br />
using namespace MyDllNamespace::Net;<br />
...<br />
regards Tobias 
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In addition to Tobias' info, you can also use #using instead of using "Add Reference" in the Project Properties:
Example:
#using <System.Data.dll>
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Hi All
When a client using shared data from remote machine.It is very fast .But with server for same it is taking more time.
The packet transmission is 300 per share data and for server 1500 as per net stat result.
As my packet size is small i disable nagle algorithm also.but not satisfied result.So Please give some guidance.
Regards
Sabita
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This is the first time I write a program after learning C++ for 1 week ago.
I use Dev-C++ and I want my program to do function such as:
Ask person to type two number : 1st number ; 2nd number.
such as: 2 ; 5;
and I want my program to get me the sum : 2 + 3 + 4 + 5 = 14
but I try many times and it always gives me : 2 + 5 = 7
This is my code :
using namespace std;
#include <iostream>
long result(long d , long e)
{
if (d >= 1 , d < e)
{
return (result(d + 1,0));
}
else
return (0);
}
int main()
{
long a,b;
long c;
cout << "1st number : ";
cin >> a;
cout << "2nd number : ";
cin >> b;
c = a + result(a , b) + b;
cout << c;
return 0;
}
Can someone tell what 's wrong with my code, and give me a hint to do it.
Thankz.
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The result() function is incorrect. Try this:
long result(long d , long e)
{
long r = 0;
int i;
if (d <= e)
{
for (i == d, i <= e, i++)
{
r += i;
}
}
return (r);
}Also change this line:
c = a + result(a , b) + b;
to
c = result(a , b);
...Steve
1. quod erat demonstrandum
2. "Give a man a fish and you've fed him for a day. Teach him how to fish and you've fed him for life." I read that somewhere once 
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Thankz for your reply. This is the first time so.....I will practice more.
By the way thankz for your "fish", hope next time to can show me how to fish.
Yeah!!!
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Can anyone tell me how to output data and recieve from a com port on xp/nt in vs2005 managed C++ ?
I have done Parallel i/o before but only on win 9x and never serial.
Thx...
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Hi,
if you are using .Net 2 then System::IO::Ports::SerialPort should be the way to go. However, i found this new serial port class quite unreliable (in terms of switching RTS) and used therefore recently the one from windows.h.
for example:
HANDLE _ComPort = CreateFile( ptrComName,....); // create a port
and use
WriteFile(_ComPort, ptrTxFrame, pTxFrameLength,&ulBytesWritten, 0);
ReadFile(_ComPort, ptrRxFrame, 256, &ulBytesWritten, NULL);
to read and write, but with this approach you'll always have to pinpoint your buffers.
pin_ptr<unsigned char> ptrTxFrame = &pTxFrame[0];
best regards Tobias
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Thx Bee..
I think that was just what I needed.
I wonder tho, about the reliability.
I don't need rts or dts.. just to have them both stay high.
I am wondering if switching is a problem. Can you elaborate a bit on that part?
If I just set it high and forget it, will it stay?
I am hoping the problem you are talking about is the api not seeing the change state.
So if I set it then it will stay, not wanting to write a watchdog for it.
Thx for the reply..
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Right, maybe it did sound a little negative. The reason for my statement was that my application really depends on a very accurate switching time between Request to Send enabled/disabled. For some reason this switching time differs for each switch, 5-15 ms while using the .Net class. Thus I need a constant switching time, which must be less than 10 ms, i'll sometimes run into trouble. With the windows.h method I have never discovered this problem. It displays all the time a continuous 5 ms switch time on my oscilloscope. Probably there is a way to close out this problem but by the time I faced this problem, it was quite critical to go ahead with my project. Therefore I decided to go for the unmanaged option for the time being.
However apart from this odd behaviour this new class is quite comfortable and very straight forward. I'll maybe give it another try after finishing my project.
best regards Tobias
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Hi
I too have been looking for a way to access the comm ports using managed code. I'm pretty new to Visual C++ so I need a little more information regarding how to setup and access a com port connected to a USB-Serial adapter. My comm port shows up as COM7 in windows. I need baby steps for opening, configuring and sending and receiving data. I only need to send about 5 or 6 chars but can possibly receive 10 or up to 512 chars from the serial device I'm interfacing with. All the code I've come across on the web doesn't seem to work with Visual C++ 2005 expess Edition.
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------ Build started: Project: Project4a, Configuration: Debug Win32 ------
Compiling...
Impl.cpp
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(112) : error C2011: 'fd_set' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(54) : see declaration of 'fd_set'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(147) : warning C4005: 'FD_SET' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(88) : see previous definition of 'FD_SET'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(156) : error C2011: 'timeval' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(97) : see declaration of 'timeval'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(212) : error C2011: 'hostent' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(153) : see declaration of 'hostent'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(225) : error C2011: 'netent' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(166) : see declaration of 'netent'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(232) : error C2011: 'servent' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(173) : see declaration of 'servent'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(244) : error C2011: 'protoent' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(185) : see declaration of 'protoent'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(400) : error C2011: 'sockaddr_in' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(321) : see declaration of 'sockaddr_in'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(410) : error C2011: 'WSAData' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(331) : see declaration of 'WSAData'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(470) : warning C4005: 'SO_DONTLINGER' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(411) : see previous definition of 'SO_DONTLINGER'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(527) : warning C4005: 'AF_IPX' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(469) : see previous definition of 'AF_IPX'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(555) : warning C4005: 'AF_MAX' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(488) : see previous definition of 'AF_MAX'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(561) : error C2011: 'sockaddr' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(494) : see declaration of 'sockaddr'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(601) : error C2011: 'sockproto' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(503) : see declaration of 'sockproto'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(640) : error C2011: 'linger' : 'struct' type redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(540) : see declaration of 'linger'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(653) : warning C4005: 'SOMAXCONN' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(553) : see previous definition of 'SOMAXCONN'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(679) : warning C4005: 'FD_READ' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(571) : see previous definition of 'FD_READ'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(682) : warning C4005: 'FD_WRITE' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(572) : see previous definition of 'FD_WRITE'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(685) : warning C4005: 'FD_OOB' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(573) : see previous definition of 'FD_OOB'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(688) : warning C4005: 'FD_ACCEPT' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(574) : see previous definition of 'FD_ACCEPT'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(691) : warning C4005: 'FD_CONNECT' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(575) : see previous definition of 'FD_CONNECT'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(694) : warning C4005: 'FD_CLOSE' : macro redefinition
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(576) : see previous definition of 'FD_CLOSE'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1626) : error C2375: 'accept' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(744) : see declaration of 'accept'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1647) : error C2375: 'bind' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(749) : see declaration of 'bind'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1666) : error C2375: 'closesocket' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(754) : see declaration of 'closesocket'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1685) : error C2375: 'connect' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(756) : see declaration of 'connect'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1706) : error C2375: 'ioctlsocket' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(761) : see declaration of 'ioctlsocket'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1727) : error C2375: 'getpeername' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(766) : see declaration of 'getpeername'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1748) : error C2375: 'getsockname' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(771) : see declaration of 'getsockname'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1771) : error C2375: 'getsockopt' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(776) : see declaration of 'getsockopt'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1792) : error C2375: 'htonl' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(783) : see declaration of 'htonl'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1809) : error C2375: 'htons' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(785) : see declaration of 'htons'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1826) : error C2375: 'inet_addr' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(787) : see declaration of 'inet_addr'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1843) : error C2375: 'inet_ntoa' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(789) : see declaration of 'inet_ntoa'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1861) : error C2375: 'listen' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(791) : see declaration of 'listen'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1879) : error C2375: 'ntohl' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(795) : see declaration of 'ntohl'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1896) : error C2375: 'ntohs' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(797) : see declaration of 'ntohs'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1916) : error C2375: 'recv' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(799) : see declaration of 'recv'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1941) : error C2375: 'recvfrom' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(805) : see declaration of 'recvfrom'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1967) : error C2375: 'select' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(813) : see declaration of 'select'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(1991) : error C2375: 'send' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(820) : see declaration of 'send'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2016) : error C2375: 'sendto' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(826) : see declaration of 'sendto'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2042) : error C2375: 'setsockopt' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(834) : see declaration of 'setsockopt'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2064) : error C2375: 'shutdown' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(841) : see declaration of 'shutdown'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2084) : error C2375: 'socket' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(845) : see declaration of 'socket'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2107) : error C2375: 'gethostbyaddr' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(852) : see declaration of 'gethostbyaddr'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2126) : error C2375: 'gethostbyname' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(857) : see declaration of 'gethostbyname'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2144) : error C2375: 'gethostname' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(859) : see declaration of 'gethostname'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2163) : error C2375: 'getservbyport' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(863) : see declaration of 'getservbyport'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2182) : error C2375: 'getservbyname' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(867) : see declaration of 'getservbyname'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2200) : error C2375: 'getprotobynumber' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(871) : see declaration of 'getprotobynumber'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2217) : error C2375: 'getprotobyname' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(873) : see declaration of 'getprotobyname'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2237) : error C2375: 'WSAStartup' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(877) : see declaration of 'WSAStartup'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2255) : error C2375: 'WSACleanup' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(881) : see declaration of 'WSACleanup'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2272) : error C2375: 'WSASetLastError' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(883) : see declaration of 'WSASetLastError'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2289) : error C2375: 'WSAGetLastError' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(885) : see declaration of 'WSAGetLastError'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2306) : error C2375: 'WSAIsBlocking' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(887) : see declaration of 'WSAIsBlocking'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2323) : error C2375: 'WSAUnhookBlockingHook' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(889) : see declaration of 'WSAUnhookBlockingHook'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2340) : error C2375: 'WSASetBlockingHook' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(891) : see declaration of 'WSASetBlockingHook'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2357) : error C2375: 'WSACancelBlockingCall' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(893) : see declaration of 'WSACancelBlockingCall'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2379) : error C2375: 'WSAAsyncGetServByName' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(895) : see declaration of 'WSAAsyncGetServByName'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2406) : error C2375: 'WSAAsyncGetServByPort' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(903) : see declaration of 'WSAAsyncGetServByPort'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2432) : error C2375: 'WSAAsyncGetProtoByName' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(911) : see declaration of 'WSAAsyncGetProtoByName'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2457) : error C2375: 'WSAAsyncGetProtoByNumber' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(918) : see declaration of 'WSAAsyncGetProtoByNumber'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2482) : error C2375: 'WSAAsyncGetHostByName' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(925) : see declaration of 'WSAAsyncGetHostByName'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2509) : error C2375: 'WSAAsyncGetHostByAddr' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(932) : see declaration of 'WSAAsyncGetHostByAddr'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2532) : error C2375: 'WSACancelAsyncRequest' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(941) : see declaration of 'WSACancelAsyncRequest'
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock2.h(2552) : error C2375: 'WSAAsyncSelect' : redefinition; different linkage
C:\Program Files\Microsoft Visual Studio 8\VC\PlatformSDK\include\winsock.h(943) : see declaration of 'WSAAsyncSelect'
c:\documents and settings\ashu\desktop\project4a\project4a\Sockets.h(126) : error C2079: 'SocketListener::tcpAddr' uses undefined struct 'sockaddr_in'
Build log was saved at "file://c:\Documents and Settings\ashu\Desktop\Project4a\Project4a\Debug\BuildLog.htm"
Project4a - 58 error(s), 11 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
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Looks like you will need to remove "winsock.h" or "winsock2.h" as an included header.
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hi and a big hello!
i wanna code a new server to control a pc.but with ability to be upgrated in future.does anybody know about plugin?
how can i use it in my program?
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i wanna know how i can use messenger or mail services in my code to send infromation to an id in background or in secret way.
-- modified at 1:10 Saturday 22nd April, 2006
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hi
i'm working on a remote admin project but.and it is a big but, i have a problem with controlling file in remote pc.
i wanna see the whole file && dir as i am see in my pc.i mean visual control!i wanna a code more power than ftp trasnfer.
thanks for ur reply
-- modified at 1:03 Saturday 22nd April, 2006
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Can anyone tell me how do I display the selected Node name of a treeView in a text box.
I have treeView containing Nodes(e.g. strings), When the user clicks on a particular string in the treeView, that string should get displayed into a textBox. What code do I need to write in treeView_NodeMouseClick event.
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Could anyone tell me what I'm doing wrong here:
<code>
// variables defined
private: array<String^>^ m_sAddressList = gcnew array<String^>{"localhost"};
private: int m_nCurrentAddress;
...
// attempting to make a property out of them
public: property array<String^>^ m_psAddressList{
String^ get(){ return array<m_sAddressList>(m_nCurrentAddress);}
}
</code>
I'm getting the following compiler error:
error C3901: 'get': must have return type 'cli::array<Type> ^' c:\documents and settings\john\my documents\programming\visual studio 2005\projects\winbot\winbot\ConnectionOperations.h 53
Any information would be greatly appreciated.
Thanks,
John
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The 'get' must return an array to be consistent with how you've defined the property - e.g., return m_sAddressList. It's not clear what you are attempting to return.
David Anton
www.tangiblesoftwaresolutions.com
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Forgive my ingnorance but what is with the '^' chaacter?
The way you are using it is a syntax error in C++.
INTP
“Testing can show the presence of errors, but not their absence.”
Edsger Dijkstra
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John R. Shaw wrote: Forgive my ingnorance but what is with the '^' chaacter?
The way you are using it is a syntax error in C++.
Hi,
It would be a syntax error in standard c++ but isn't this the (Managed) C++/CLI discussion board? Therefore i would like to point out: "The carat operator (^) (often called a "hat" by C++/CLI folks) indicates that a variable or parameter refers to a reference-type object." Or did i misread your point?
regards Tobias 
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2beeOr did i misread your point?
Nope! You told me exactly what I wanted to know. I had a feeling it was something like that, as if C++ did not have enough operators already.
INTP
“Testing can show the presence of errors, but not their absence.”
Edsger Dijkstra
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