男女做那个网站动态图片/数字营销平台有哪些

进一步再举一例:本例要实现一个绘制一个椭圆形功能

<1> : 根据前一篇"vs2010 MFC DLL创建和调用"文章新建MFC Dll工程,假设工程名CMFCDLLDemo02;

<2> : 在CMFCDLLDemo02.h中添加:

#include "resource.h"  // main symbols

// CCMFCDLLDemo02App
// See CMFCDLLDemo02.cpp for the implementation of this class
//
extern "C" void PASCAL EXPORT DrawEllipse( CRect rect, CDC *pDC );
class CCMFCDLLDemo02App : public CWinApp
{
public:
 CCMFCDLLDemo02App();

// Overrides
public:
 virtual BOOL InitInstance();

 DECLARE_MESSAGE_MAP()
};

<3> : 然后在CMFCDLLDemo02.cpp中添加函数体:

extern "C" void PASCAL EXPORT DrawEllipse( CRect rect, CDC *pDC)
{
 CBrush brush;
 brush.CreateSolidBrush(RGB(0,0,255));
 pDC->SelectObject(&brush);
 pDC->Ellipse(&rect);
}

<4> : def文件配置:

; CMFCDLLDemo02.def : Declares the module parameters for the DLL.

LIBRARY "MFCDLLDEMO"

EXPORTS
    ; Explicit exports can go here
 DrawEllipse

<5> : ->build CMFCDLLDemo02工程,既可以.

<6> : 调用MFCDLLDEMO.dll,新建工程一个MFC工程(假设单文档工程吧).

<7> : 在视窗view的OnDraw函数中增加:

void CMFCApView::OnDraw(CDC* pDC)
{// DLL MFC Library function call
   CRect rect;rect.top=10;rect.left=10;rect.right=200;rect.bottom=200; DrawEllipse(rect,pDC); // DLL class object call
   int a, b, c;CString str;DLLclass classFromDLL; classFromDLL.Arg = 6; a = classFromDLL.Add(3, 2);b = classFromDLL.Sub(3, 2);c = classFromDLL.Arg;// Display data in window
   int y = 250, dy;TEXTMETRIC tm;pDC->GetTextMetrics(&tm);dy = tm.tmHeight + tm.tmExternalLeading; str.Format("DLL class Add function return: %d", a);pDC->TextOut(20, y, str);y += dy;str.Format("DLL class Sub function return: %d", b);pDC->TextOut(20, y, str);y += dy;str.Format("DLL class Arg Variable return: %d", c);pDC->TextOut(20, y, str);y += dy; a = DLLArg;b = DLLfun2(30); str.Format("DLL class Arg Variable return: %d", a);pDC->TextOut(20, y, str);y += dy;str.Format("DLL function \"DLLfun2\" return: %d", b);pDC->TextOut(20, y, str);
}

<8> 编译运行,既可以看见椭圆体图形.