VS2008,GDIPlus初步

以VS2008 MDI为例,

step1.在文件stdafx.h中加入如下代码

#include <GdiPlus.h>
#pragma comment(lib, "gdiplus.lib")
using namespace Gdiplus; 
#ifndef ULONG_PTR
#define ULONG_PRT unsigned long*
#endif

step2. 定义全局变量,如下所示.

// The one and only CPhotoMeterApp object
CPhotoMeterApp theApp;
 
//初始化gdiplus的环境
ULONG_PTR  gdiplusToken; 
//......

step3.在InitInstance()函数初始化GDI+

// Initialize GDI+.
 Gdiplus::GdiplusStartupInput  gdiplusStartupInput;
 Gdiplus::GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL); 
// Parse command line for standard shell commands, DDE, file open
 CCommandLineInfo cmdInfo;
 ParseCommandLine(cmdInfo);

step4.在ExitInstance()函数中销毁GDI+

//shutdown GDI+
 Gdiplus::GdiplusShutdown(gdiplusToken);
 
step5.在void CAboutDlg::OnPaint()举个GDI+绘制的例子
 
void CAboutDlg::OnPaint()
{
 CPaintDC dc(this); // device context for painting
 Graphics graphics(dc.GetSafeHdc());     //Graphics graphics(dc.m_hDC);也可以 
CRect rect;
 GetDlgItem(IDC_STATIC_FRAME)->GetWindowRect(&rect);    //IDC_STATIC_FRAME是个picture控件,visible=false
 ScreenToClient(&rect); 
  
 //Brush
 Gdiplus::LinearGradientBrush lingrbrush(Gdiplus::Rect(rect.left, rect.top, rect.Width(), rect.Height()),  //  绘制区域
  Color(250, 248,242,240),   //  第一种颜色
  Color(250, 255,255,255),   //  第二种颜色 
  (Gdiplus::REAL)(270));    //  渐变色的角度 graphics.FillRectangle(&lingrbrush, Gdiplus::Rect(rect.left,rect.top,rect.Width(),rect.Height() ) );
 
 Gdiplus::Pen pen(Color(255,145,155,156));
 Gdiplus::Pen penshade(Color(100,145,155,156));
 graphics.DrawRectangle(&pen,Gdiplus::Rect(rect.left,rect.top,rect.Width(),rect.Height()));
 graphics.DrawRectangle(&penshade,Gdiplus::Rect(rect.left,rect.top,rect.Width()+1,rect.Height()+1)); // 不为绘图消息调用 CDialog::OnPaint()
}

 step6.贴图效果