VC++6 开发MFC扩展DLL以及MFC DLL可以包含界面

╰半夏微凉° 2022-12-29 06:36 210阅读 0赞

VC环境可以开发win32 DLL和MFC DLL；下面来开发一个MFC DLL；Win7, VC6；  
新建一个MFC exe工程；名为mfcddd；在同级目录下新建一个文件夹，名为mfcbin；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center]  
默认的exe输出目录；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 1]  
改为如下；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 2]  
生成exe后；  
![在这里插入图片描述][20201220203051468.png_pic_center]  
新建一个mfc dll工程；名为myddd;  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 3]  
选择MFC 扩展DLL；MFC扩展DLL可以导出类；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 4]  
在dll添加一个类；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 5]  
设置dll和Lib文件输出路径；  
/out:"…/…/mfcbin/myddd.dll" /implib:"…/…/mfcbin/myddd.lib"  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 6]  
生成类后环境自己生成了头文件、CPP文件、构造和析构函数；  
添加自己的代码；类定义前面添加 AFX\_EXT\_CLASS ，此表示类可以被导出；  
添加了自己的代码以后类如下；  
头文件；

class AFX_EXT_CLASS basestation  
    { 
    
    private:
    	CString baseaddress;   //基站位置
    
    public:
    	basestation();
    	virtual ~basestation();
    	void setaddress(CString );
    	CString getaddress();
    
    };

CPP文件；

basestation::basestation()
    { 
    
    }
    
    basestation::~basestation()
    { 
    
    }
    
    void basestation::setaddress(CString addr)
    { 
    	baseaddress=addr;
    }
    
    CString basestation::getaddress()
    { 
    	return baseaddress;
    }

先生成dll看一下；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 7]  
然后在exe工程；设置Lib路径；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 8]  
把dll中类的头文件在exe工程中拷贝一份；此头文件不必再包含 AFX\_EXT\_CLASS；对话框的cpp文件包含此头文件；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 9]  
exe工程对话框中添加一点界面；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 10]  
为按钮添加一个单击消息处理函数；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 11]  
为编辑框添加一个成员变量；此成员变量属于对话框类；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 12]  
添加完成员变量；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 13]  
设exe为活动工程；  
![在这里插入图片描述][20201220203238290.png_pic_center]  
构建一下；出错；找不到myddd.lib；  
在对话框CPP文件头部添加 \#pragma comment(lib, “S:\\94\\vcprj\\mfcbin\\myddd.lib”)；使用代码来导入Lib;

按钮代码如下；运行；调用了dll中的类；UpdateData(FALSE)，把成员变量的值交换到界面的控件上显示；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 14]  
如果只需要导出类的话；用Win32 DLL也行；MFC扩展DLL还可以包含界面；下面来进行；  
在DLL工程添加一个对话框资源；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 15]  
为此对话框新建一个类；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 16]  
MFC类带有基类；前面开发的类没有；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 17]  
设置此对话框类为可导出；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 18]  
构建DLL；出现下图错误；对话框头文件中对话框的标识符未定义；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 19]  
包含Resource.h；然后生成DLL；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 20]  
在exe项目中拷贝一份dll中对话框类的头文件；去除AFX\_EXT\_CLASS；  
exe的对话框cpp文件包含：  
\#include “basestation.h”  
\#include “testDlg.h”  
编译一下exe；出错；  
![在这里插入图片描述][20201220203430876.png_pic_center]  
exe的资源文件添加IDD\_DIALOG1的数值定义；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 21]  
按钮代码；

void CMfcdddDlg::OnButton1() 
    { 
    	// TODO: Add your control notification handler code here
    	basestation base1;
    	base1.setaddress("长安街11号");
    	m_addr = base1.getaddress();
    	UpdateData(FALSE);
    
    	testDlg dlg1;
    	dlg1.DoModal();
    }

点击按钮后运行如下；除了调用到DLL中类；还弹出了DLL中的对话框；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 22]  
工程；  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JjYm9ibzIxY24_size_16_color_FFFFFF_t_70_pic_center 23]

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