clr应用程序中的mfc dll错误或win32 dll？ [英] mfc dll error or win32 dll in clr app?

问题描述

我有一个mfc dll，它是一个mfc控制台应用程序，我想将代码作为dll添加到clr c ++ aoo。

控制台代码：

I have an mfc dll, it was an mfc console application which I want to add the code as dll to a clr c++ aoo.
code of console :

#include <windows.h>
#include <iostream>
#include <complex>

void main()
{
    double i,c,d,f,g,e;
	HDC hdc = GetDC(GetDesktopWindow());
    DWORD ret = GetDeviceCaps(hdc, HORZSIZE);
    DWORD ret2 = GetDeviceCaps(hdc, VERTSIZE);
    std::cout << "Your screen size in inches is " << ret/25.4 << "\" x " << ret2/25.4 << "\" \n";
    ReleaseDC(GetDesktopWindow(), hdc);
	i=ret/25.4;
	c=ret2/25.4;
d=0;
f=0;
d=((i*i)+(c*c));
g=sqrt(d);
std::cout << "Your screen size in inches is " << g << "\" \n";
	getchar();
}

mydll.dll代码（mydll.cpp）：

code of mydll.dll (mydll.cpp):

// mydll.cpp : Defines the initialization routines for the DLL.
//

#include "stdafx.h"
#include "mydll.h"
#include <windows.h>
#include <iostream>
#include <complex>
#include <math.h>

#ifdef _DEBUG
#define new DEBUG_NEW
#endif

//
//TODO: If this DLL is dynamically linked against the MFC DLLs,
//		any functions exported from this DLL which call into
//		MFC must have the AFX_MANAGE_STATE macro added at the
//		very beginning of the function.
//
//		For example:
//
//		extern "C" BOOL PASCAL EXPORT ExportedFunction()
//		{
//			AFX_MANAGE_STATE(AfxGetStaticModuleState());
//			// normal function body here
//		}
//
//		It is very important that this macro appear in each
//		function, prior to any calls into MFC.  This means that
//		it must appear as the first statement within the 
//		function, even before any object variable declarations
//		as their constructors may generate calls into the MFC
//		DLL.
//
//		Please see MFC Technical Notes 33 and 58 for additional
//		details.
//

// CmydllApp

BEGIN_MESSAGE_MAP(CmydllApp, CWinApp)
END_MESSAGE_MAP()


// CmydllApp construction

CmydllApp::CmydllApp()
{
	// TODO: add construction code here,
	// Place all significant initialization in InitInstance
}


// The one and only CmydllApp object

CmydllApp theApp;


// CmydllApp initialization

BOOL CmydllApp::InitInstance()
{
	CWinApp::InitInstance();

	return TRUE;
}


void MyWin32ClassTwo()
{

			  double i,c,d,f,g,k;
			  char l; 
			  HDC hdc = GetDC(GetDesktopWindow());
    DWORD ret = GetDeviceCaps(hdc, HORZSIZE);
    DWORD ret2 = GetDeviceCaps(hdc, VERTSIZE);
      ReleaseDC(GetDesktopWindow(), hdc);
	i=ret/25.4;
	c=ret2/25.4;
d=0;
f=0;
d=((i*i)+(c*c));
g=sqrt(d);
}

如何创建dll并添加到win32 form（clr）应用程序并调用dll的g变量，是吗必须在dll中创建函数吗？

简单的答案请我是C ++的新手。

简单的如何在C ++ clr表单Project中获取监视器的horzsize。 />


谢谢

how to create dll and add to win32 form (clr) application and call the dll's g variable, do I have to create function in dll?
simple answer please I am NEW to C++.
In simple how to get the horzsize of monitor in a C++ clr forms Project.

Thank you

推荐答案

是的，如果你想在dll中使用它，你必须声明并导出一些函数。最好的出发点是创建一个C dll（使用项目向导），它导出一些裸函数。首选静态链接以避免使用MFC和dll hell。



我的文章呼叫所有电台是关于C ++和C＃interop with dlls，但是dll保持不变。



提示：依赖性助行器帮助查看dll函数

Yes you have to declare and export some functions if you want it in a dll. Best starting point is to create an C dll (with the project wizard) which exports some "naked" functions. Prefer static linking to avoid MFC and "dll hell".

My article Calling all stations is about C++ and C# interop with dlls, but the dll stays the same.

Tip: Dependency walker helps to see the dll-functions

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