All,
I have a MFC Mixed mode dll which is working well. I am now tring to use a
regular C++ class from another DLL which has a method called GetMessage.
When I link I get 2 error messages:
MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: class
CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)"
(?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in
function "private: void __thiscall CMyClass::Proce ssStateResponse (class
CStateResponse const &)"
(?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
MyClass.obj : error LNK2019: unresolved external symbol "public: class
CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)"
(?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in
function "private: void __thiscall CMyClass::Proce ssStateResponse (class
CSaveStateRespo nse const &)"
(?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
CMyClass::Proce ssResponse( stateMsg )
....
CMessage* pMessage = stateMsg.GetMes sage( i );
....
This class and function have been used for years, but I get this specicific
link error when I use it from any MFC Mixed mode dll. If I rename the
function something other than GetMessage, I do not get the linking errors.
This leads me to think there is some conflict on the GetMessage name with
the .Net Framework but I do not know how to resolve this. Any ideas?
Thanks!
Craig Klementowski 7 3084
Hi Craig,
<Craig K> wrote in message news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. All,
I have a MFC Mixed mode dll which is working well. I am now tring to use a regular C++ class from another DLL which has a method called GetMessage. When I link I get 2 error messages:
MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CStateResponse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) MyClass.obj : error LNK2019: unresolved external symbol "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
CMyClass::Proce ssResponse( stateMsg )
...
CMessage* pMessage = stateMsg.GetMes sage( i );
...
This class and function have been used for years, but I get this specicific link error when I use it from any MFC Mixed mode dll. If I rename the function something other than GetMessage, I do not get the linking errors. This leads me to think there is some conflict on the GetMessage name with the .Net Framework but I do not know how to resolve this. Any ideas?
Thanks!
Craig Klementowski
what happens if you
#undef GetMessage
in the file that causes the errors?
Marcus
Marcus,
I tried that and unfortunately it did not help.
Thanks.
Craig
"Marcus Heege" <NO****@heege.n et> wrote in message
news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. Hi Craig,
<Craig K> wrote in message news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. All,
I have a MFC Mixed mode dll which is working well. I am now tring to use a regular C++ class from another DLL which has a method called GetMessage. When I link I get 2 error messages:
MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CStateResponse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) MyClass.obj : error LNK2019: unresolved external symbol "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
CMyClass::Proce ssResponse( stateMsg )
...
CMessage* pMessage = stateMsg.GetMes sage( i );
...
This class and function have been used for years, but I get this specicific link error when I use it from any MFC Mixed mode dll. If I rename the function something other than GetMessage, I do not get the linking errors. This leads me to think there is some conflict on the GetMessage name with the .Net Framework but I do not know how to resolve this. Any ideas?
Thanks!
Craig Klementowski
what happens if you #undef GetMessage in the file that causes the errors?
Marcus
Hi Craig,
<Craig K> wrote in message news:u%******** ********@TK2MSF TNGP02.phx.gbl. .. Marcus,
I tried that and unfortunately it did not help.
Thanks.
Craig
"Marcus Heege" <NO****@heege.n et> wrote in message news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. Hi Craig,
<Craig K> wrote in message news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. All,
I have a MFC Mixed mode dll which is working well. I am now tring to use a regular C++ class from another DLL which has a method called GetMessage. When I link I get 2 error messages:
MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CStateResponse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) MyClass.obj : error LNK2019: unresolved external symbol "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
CMyClass::Proce ssResponse( stateMsg )
...
CMessage* pMessage = stateMsg.GetMes sage( i );
...
This class and function have been used for years, but I get this specicific link error when I use it from any MFC Mixed mode dll. If I rename the function something other than GetMessage, I do not get the linking errors. This leads me to think there is some conflict on the GetMessage name with the .Net Framework but I do not know how to resolve this. Any ideas?
Thanks!
Craig Klementowski
what happens if you #undef GetMessage in the file that causes the errors?
Marcus
Is it possible to repoduce the poblem in a small VS solution, so that I can
do further reseach?
"Marcus Heege" <NO****@heege.n et> wrote in message
news:u0******** ******@TK2MSFTN GP05.phx.gbl... Hi Craig,
<Craig K> wrote in message news:u%******** ********@TK2MSF TNGP02.phx.gbl. .. Marcus,
I tried that and unfortunately it did not help.
Thanks.
Craig
"Marcus Heege" <NO****@heege.n et> wrote in message news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. Hi Craig,
<Craig K> wrote in message news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. All,
I have a MFC Mixed mode dll which is working well. I am now tring to use a regular C++ class from another DLL which has a method called GetMessage. When I link I get 2 error messages:
MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CStateResponse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) MyClass.obj : error LNK2019: unresolved external symbol "public: class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced in function "private: void __thiscall CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z)
CMyClass::Proce ssResponse( stateMsg )
...
CMessage* pMessage = stateMsg.GetMes sage( i );
...
This class and function have been used for years, but I get this specicific link error when I use it from any MFC Mixed mode dll. If I rename the function something other than GetMessage, I do not get the linking errors. This leads me to think there is some conflict on the GetMessage name with the .Net Framework but I do not know how to resolve this. Any ideas?
Thanks!
Craig Klementowski
what happens if you #undef GetMessage in the file that causes the errors?
Marcus
Is it possible to repoduce the poblem in a small VS solution, so that I can do further reseach?
Please view the DLL containing CTransmitMessag e with DependencyWalke r. Most
likely while the DLL was built, it renamed the function to GetMessageA. www.dependencywalker.com
Ben,
It does seem to do that. How I do get it to not do that? Why does it work
from all other non mixed mode dll's?
Thanks!
Craig
"Ben Voigt" <rb*@nospam.nos pam> wrote in message
news:%2******** ********@TK2MSF TNGP05.phx.gbl. .. "Marcus Heege" <NO****@heege.n et> wrote in message news:u0******** ******@TK2MSFTN GP05.phx.gbl... Hi Craig,
<Craig K> wrote in message news:u%******** ********@TK2MSF TNGP02.phx.gbl. .. Marcus,
I tried that and unfortunately it did not help.
Thanks.
Craig
"Marcus Heege" <NO****@heege.n et> wrote in message news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. Hi Craig,
<Craig K> wrote in message news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. > All, > > I have a MFC Mixed mode dll which is working well. I am now tring to > use a regular C++ class from another DLL which has a method called > GetMessage. When I link I get 2 error messages: > > > MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: > class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" > (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced > in function "private: void __thiscall > CMyClass::Proce ssStateResponse (class CStateResponse const &)" > (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) > MyClass.obj : error LNK2019: unresolved external symbol "public: class > CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" > (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) referenced > in function "private: void __thiscall > CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" > (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) > > CMyClass::Proce ssResponse( stateMsg ) > > ... > > CMessage* pMessage = stateMsg.GetMes sage( i ); > > ... > > This class and function have been used for years, but I get this > specicific link error when I use it from any MFC Mixed mode dll. If I > rename the function something other than GetMessage, I do not get the > linking errors. This leads me to think there is some conflict on the > GetMessage name with the .Net Framework but I do not know how to > resolve this. Any ideas? > > Thanks! > > Craig Klementowski
what happens if you #undef GetMessage in the file that causes the errors?
Marcus
Is it possible to repoduce the poblem in a small VS solution, so that I can do further reseach?
Please view the DLL containing CTransmitMessag e with DependencyWalke r. Most likely while the DLL was built, it renamed the function to GetMessageA.
www.dependencywalker.com
<Craig K> wrote in message news:eT******** ********@TK2MSF TNGP05.phx.gbl. .. Ben,
It does seem to do that. How I do get it to not do that? Why does it work from all other non mixed mode dll's?
Marcus has it right, the windows.h header file (or one of the hundreds of
files it #includes) defines GetMessage to GetMessageA or GetMessageW to
choose either the Unicode or ANSI version of the builtin (user.dll)
GetMessage API. Your managed program probably doesn't #include <windows.h>,
so you're not getting the same replacement.
You can:
(1) #include <windows.h> in your caller
or
(2) #undef GetMessage in the exporting dll
or
(3) in your header file for the class, above the class definition, use a
static inline function instead of a macro for the GetMessage thing as
follows:
#undef GetMessage
static inline BOOL GetMessage(
LPMSG lpMsg,
HWND hWnd,
UINT wMsgFilterMin,
UINT wMsgFilterMax
) {
#if UNICODE
return ::GetMessageW(l pMsg, hWnd, wMsgFilterMin, wMsgFilterMax);
#else
return ::GetMessageA(l pMsg, hWnd, wMsgFilterMin, wMsgFilterMax);
#endif
}
This will shim only the Windows API GetMessage and not all other occurances
of the identifier. (inline functions are resolved based on scope while
macros hit everything). Since it is inline, there will be no extra function
call overhead -- it is just as efficient as a macro. Thanks!
Craig
"Ben Voigt" <rb*@nospam.nos pam> wrote in message news:%2******** ********@TK2MSF TNGP05.phx.gbl. .. "Marcus Heege" <NO****@heege.n et> wrote in message news:u0******** ******@TK2MSFTN GP05.phx.gbl... Hi Craig,
<Craig K> wrote in message news:u%******** ********@TK2MSF TNGP02.phx.gbl. .. Marcus,
I tried that and unfortunately it did not help.
Thanks.
Craig
"Marcus Heege" <NO****@heege.n et> wrote in message news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. > Hi Craig, > > <Craig K> wrote in message > news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. >> All, >> >> I have a MFC Mixed mode dll which is working well. I am now tring to >> use a regular C++ class from another DLL which has a method called >> GetMessage. When I link I get 2 error messages: >> >> >> MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: >> class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" >> (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) >> referenced in function "private: void __thiscall >> CMyClass::Proce ssStateResponse (class CStateResponse const &)" >> (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) >> MyClass.obj : error LNK2019: unresolved external symbol "public: >> class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" >> (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) >> referenced in function "private: void __thiscall >> CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" >> (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) >> >> CMyClass::Proce ssResponse( stateMsg ) >> >> ... >> >> CMessage* pMessage = stateMsg.GetMes sage( i ); >> >> ... >> >> This class and function have been used for years, but I get this >> specicific link error when I use it from any MFC Mixed mode dll. If I >> rename the function something other than GetMessage, I do not get the >> linking errors. This leads me to think there is some conflict on the >> GetMessage name with the .Net Framework but I do not know how to >> resolve this. Any ideas? >> >> Thanks! >> >> Craig Klementowski > > what happens if you > #undef GetMessage > in the file that causes the errors? > > Marcus
Is it possible to repoduce the poblem in a small VS solution, so that I can do further reseach?
Please view the DLL containing CTransmitMessag e with DependencyWalke r. Most likely while the DLL was built, it renamed the function to GetMessageA.
www.dependencywalker.com
Ben,
Great #3 works for me. I think I may prefer to rename the function in the
long run though. Never did like #defines that much....
Thanks Guys!
Craig
"Ben Voigt" <rb*@nospam.nos pam> wrote in message
news:%2******** **********@TK2M SFTNGP05.phx.gb l... <Craig K> wrote in message news:eT******** ********@TK2MSF TNGP05.phx.gbl. .. Ben,
It does seem to do that. How I do get it to not do that? Why does it work from all other non mixed mode dll's?
Marcus has it right, the windows.h header file (or one of the hundreds of files it #includes) defines GetMessage to GetMessageA or GetMessageW to choose either the Unicode or ANSI version of the builtin (user.dll) GetMessage API. Your managed program probably doesn't #include <windows.h>, so you're not getting the same replacement.
You can: (1) #include <windows.h> in your caller or (2) #undef GetMessage in the exporting dll or (3) in your header file for the class, above the class definition, use a static inline function instead of a macro for the GetMessage thing as follows:
#undef GetMessage static inline BOOL GetMessage( LPMSG lpMsg, HWND hWnd, UINT wMsgFilterMin, UINT wMsgFilterMax ) { #if UNICODE return ::GetMessageW(l pMsg, hWnd, wMsgFilterMin, wMsgFilterMax); #else return ::GetMessageA(l pMsg, hWnd, wMsgFilterMin, wMsgFilterMax); #endif }
This will shim only the Windows API GetMessage and not all other occurances of the identifier. (inline functions are resolved based on scope while macros hit everything). Since it is inline, there will be no extra function call overhead -- it is just as efficient as a macro.
Thanks!
Craig
"Ben Voigt" <rb*@nospam.nos pam> wrote in message news:%2******** ********@TK2MSF TNGP05.phx.gbl. .. "Marcus Heege" <NO****@heege.n et> wrote in message news:u0******** ******@TK2MSFTN GP05.phx.gbl... Hi Craig,
<Craig K> wrote in message news:u%******** ********@TK2MSF TNGP02.phx.gbl. .. > Marcus, > > I tried that and unfortunately it did not help. > > Thanks. > > Craig > > "Marcus Heege" <NO****@heege.n et> wrote in message > news:%2******** ********@TK2MSF TNGP04.phx.gbl. .. >> Hi Craig, >> >> <Craig K> wrote in message >> news:%2******** ********@TK2MSF TNGP03.phx.gbl. .. >>> All, >>> >>> I have a MFC Mixed mode dll which is working well. I am now tring to >>> use a regular C++ class from another DLL which has a method called >>> GetMessage. When I link I get 2 error messages: >>> >>> >>> MyClass.obj : error LNK2028: unresolved token (0A00074C) "public: >>> class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" >>> (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) >>> referenced in function "private: void __thiscall >>> CMyClass::Proce ssStateResponse (class CStateResponse const &)" >>> (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) >>> MyClass.obj : error LNK2019: unresolved external symbol "public: >>> class CMessage * __thiscall CTransmitMessag e::GetMessage(i nt)" >>> (?GetMessage@CT ransmitMessage@ DSS@@$$FQAEPAVC Message@2@H@Z) >>> referenced in function "private: void __thiscall >>> CMyClass::Proce ssStateResponse (class CSaveStateRespo nse const &)" >>> (?ProcessStateR esponse@CMyClas s@DSS@@$$FAAEXA BVCStateRespons e@2@@Z) >>> >>> CMyClass::Proce ssResponse( stateMsg ) >>> >>> ... >>> >>> CMessage* pMessage = stateMsg.GetMes sage( i ); >>> >>> ... >>> >>> This class and function have been used for years, but I get this >>> specicific link error when I use it from any MFC Mixed mode dll. If >>> I rename the function something other than GetMessage, I do not get >>> the linking errors. This leads me to think there is some conflict on >>> the GetMessage name with the .Net Framework but I do not know how to >>> resolve this. Any ideas? >>> >>> Thanks! >>> >>> Craig Klementowski >> >> what happens if you >> #undef GetMessage >> in the file that causes the errors? >> >> Marcus
Is it possible to repoduce the poblem in a small VS solution, so that I can do further reseach?
Please view the DLL containing CTransmitMessag e with DependencyWalke r. Most likely while the DLL was built, it renamed the function to GetMessageA.
www.dependencywalker.com
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last post by:
How can i add a mobile payment intergratation into php mysql website.
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