Now encountered a strange question,
Create a console application CLR console application, add the DLL and lib (engineering properties, lib directory and name is added to the DLL into dedug folder), compiled through,
no problemCreate a Windows Forms application, use the same method to add the DLL and lib, compile error, error is call DLL function is not successful,
DLL code below

//h file 

# if! Defined (_FTDCTRADERAPI_H) 
# define _FTDCTRADERAPI_H 

# if _MSC_VER & gt; 1000 
# pragma once 
# endif//_MSC_VER & gt; 1000 

# include "ThostFtdcUserApiStruct. H" 

# if defined (ISLIB) & amp; & Defined (WIN32) 
# ifdef LIB_TRADER_API_EXPORT 
# define TRADER_API_EXPORT __declspec (dllexport) 
# the else 
# define TRADER_API_EXPORT __declspec (dllimport) 
# endif 
# the else 
# define TRADER_API_EXPORT 
# endif 

The class TRADER_API_EXPORT CThostFtdcTraderApi 
{
Public: 
The static CThostFtdcTraderApi * CreateFtdcTraderApi (const char * pszFlowPath=""); 
}; 

Console program, successfully run

 # include "stdafx. H" 


# include ". \ ThostTraderApi \ ThostFtdcTraderApi h "
Using the namespace System; 

Int main (array ^ args) 
{
CThostFtdcTraderApi * aa=CThostFtdcTraderApi: : CreateFtdcTraderApi (); 
return 0; 
} 

Winform program 
//2. CPP: the main project file. 

# include "stdafx. H" 
# include "Form1. H" 
# include ". \ ThostTraderApi \ ThostFtdcTraderApi h "
Using the namespace My2; 

[STAThreadAttribute] 
Int main (array ^ args) 
{
//Enabling Windows XP visual effects before any controls are created 
Application: : EnableVisualStyles (); 
Application: : SetCompatibleTextRenderingDefault (false); 
CThostFtdcTraderApi * aa=CThostFtdcTraderApi: : CreateFtdcTraderApi (); 

//Create the main window and run it 
Application: : Run (gcnew _click ()); 
return 0; 


} 

The correct 

The error LNK2028: unresolved token (0 a00000f) "public: static class CThostFtdcTraderApi * __clrcall CThostFtdcTraderApi: : CreateFtdcTraderApi (char const *)" (? CreateFtdcTraderApi @ CThostFtdcTraderApi @ @ $$FSMPAV1 @ PBD @ Z) referenced in the function "int __clrcall main (cli: : array ^)" (? The main @ @ $$$$AAVString 01 ap HYMHP @ System @ @ @ Z) I tried to remove the lib will appear the same mistake, namely in winform failed with

The two problems:
1, how can success under winform calls the lib and DLL
2, the individual did not say if the call fails h header file, namely the segment

 # if! Defined (_FTDCTRADERAPI_H) 
# define _FTDCTRADERAPI_H 

# if _MSC_VER & gt; 1000 
# pragma once 
# endif//_MSC_VER & gt; 1000 

# include "ThostFtdcUserApiStruct. H" 

# if defined (ISLIB) & amp; & Defined (WIN32) 
# ifdef LIB_TRADER_API_EXPORT 
# define TRADER_API_EXPORT __declspec (dllexport) 
# the else 
# define TRADER_API_EXPORT __declspec (dllimport) 
# endif 
# the else 
# define TRADER_API_EXPORT 
# endif 

how to change?
3, I try to establish the win32, MFC project, are able to compile successfully, this what is going on, o master,

CodePudding user response:

https://www.baidu.com/s? Wd=20 lnk2028 error % % % 20 unresolved % 3 a token % 20 (0 a00000f) % 20 site%3amicrosoft.com

CodePudding user response:

Public: static class CThostFtdcTraderApi * __clrcall CThostFtdcTraderApi: : CreateFtdcTraderApi (

CodePudding user response:

reference 1st floor zhao4zhong1 response:

https://www.baidu.com/s? Wd=20 lnk2028 error % % % 20 unresolved % 3 a token % 20 (0 a00000f) % 20 site%3amicrosoft.com

Hey, isn't this add DLL problem,

CodePudding user response:

refer to the second floor Dobzhansky response:

public: static class CThostFtdcTraderApi * __clrcall CThostFtdcTraderApi: : CreateFtdcTraderApi (

You mean to make me h header file instead? Didn't understand

CodePudding user response:

At present can't solve the problem, now can only use the console entry and then hide console to do,,
Don't know if master have know

CodePudding user response:

C the Run - Time Libraries http://msdn.microsoft.com/zh-cn/library/abx4dbyh (vs. 80). Aspx
?

CodePudding user response:

# pragma managed
# pragma fsound_unmanaged

Or set the CLR supporting for file,