MFC结合GDI+

创建一个空的MFC界面，在确定按钮函数里进行画图：
1、包含头文件与库

在stdafx.h中加入以下三行代码：

#include "gdiplus.h"
using namespace Gdiplus;
#pragma comment(lib, "gdiplus.lib")

2、安装GDI+

在使用GDI+之前要进行安装，否则程序不会报错，但绘图不成功。安装方法如下：

GdiplusStartupInput gdiplusStartupInput;
ULONG_PTR           gdiplusToken;
GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);

安装完成后就可以使用GDI+进行绘图了……

3、卸载GDI+

卸载调用如下函数即可


GdiplusShutdown(gdiplusToken);

在确定按钮触发函数里添加如下画图函数：

Graphics graphics(this->GetDC()->m_hDC);
	Pen greenPen(Color::Green, 3);
	PointF point1(100.0f, 100.0f);//开始点
	PointF point2(200.0f, 50.0f);
	PointF point3(400.0f, 10.0f);
	PointF point4(500.0f, 100.0f);
	PointF point5(600.0f, 200.0f);
	PointF point6(700.0f, 400.0f);
	PointF point7(500.0f, 500.0f);//结束点

	PointF curvePoints[7] = {
		point1,
		point2,
		point3,
		point4,
		point5,
		point6,
		point7 };
	PointF* pcurvePoints = curvePoints;
	//画闭合曲线
	graphics.DrawClosedCurve(&greenPen, curvePoints, 7);
	//画连接点
	SolidBrush redBrush(Color::Red);
	SolidBrush startBrush(Color::Blue);
	SolidBrush endBrush(Color::Black);
	graphics.FillEllipse(&startBrush, Rect(95, 95, 10, 10));
	graphics.FillEllipse(&redBrush, Rect(495, 95, 10, 10));
	graphics.FillEllipse(&redBrush, Rect(195, 45, 10, 10));
	graphics.FillEllipse(&redBrush, Rect(395, 5, 10, 10));
	graphics.FillEllipse(&redBrush, Rect(595, 195, 10, 10));
	graphics.FillEllipse(&redBrush, Rect(695, 395, 10, 10));
	graphics.FillEllipse(&endBrush, Rect(495, 495, 10, 10));