朱金灿        GDI+是GDI的升级版本。在VC6.0中并没有配备GDI+的相关文件。那么如何在VC6.0使用GDI+呢?我从网上搜索了一些资料，并结合自己的使用，总结出一下两种方法。下面我各建一个MFC工程介绍这两种做法。   1．  找到GDI+库文件和头文件，把它放到一个文件夹GDI+Files。这个文件夹包括30个头文件和一个库文件。   2.新建一个单文档工程“UseGdiPlus”，把文件夹GDI+Files拷贝进工程文件夹。   3.进行工程设置，选择VC的Project菜单栏的Setting菜单项，在对话框中的C/C++选项卡中的Category一栏中选择General, 在Project Options中加入一个选择：/I "GDI+Files"，如下图所示： 在Project->stting->Link->Object/libary中加入GDI+Files\GdiPlus.lib。   4.新建一个.h文件QGdiPlus.h，该头文件的内容如下：   #pragma once   // Add GDI+ support to MFC or WTL application. // // Include this file in StdAfx.h // // MFC: Add a QGdiPlus variable to your application class to start and stop GDI+. // ATL: Create a QGdiPlus local variable in _tWinMain. // Constructor starts, destructor stops.       // Ensure that GdiPlus header files work properly with MFC DEBUG_NEW and STL header files. // Q317799: PRB: Microsoft Foundation Classes DEBUG_NEW Does Not Work with GDI+   #define iterator _iterator   #ifdef _DEBUG   static int nGdiPlusObjects = 0;   namespace Gdiplus {        namespace DllExports        {               #include <GdiplusMem.h>        };          #ifndef _GDIPLUSBASE_H        #define _GDIPLUSBASE_H        class GdiplusBase        {               public:                      void (operator delete)(void* in_pVoid)                      {                             nGdiPlusObjects--;                             DllExports::GdipFree(in_pVoid);                      }                        void* (operator new)(size_t in_size)                      {                             nGdiPlusObjects++;                             return DllExports::GdipAlloc(in_size);                      }                        void (operator delete[])(void* in_pVoid)                      {                             nGdiPlusObjects--;                             DllExports::GdipFree(in_pVoid);                      }                        void* (operator new[])(size_t in_size)                      {                             nGdiPlusObjects++;                             return DllExports::GdipAlloc(in_size);                      }                        void * (operator new)(size_t nSize, LPCSTR /*lpszFileName*/, int /*nLine*/)                      {                             nGdiPlusObjects++;                             return DllExports::GdipAlloc(nSize);                      }                        void operator delete(void* p, LPCSTR /*lpszFileName*/, int /*nLine*/)                      {                             nGdiPlusObjects--;                             DllExports::GdipFree(p);                      }                 };        #endif // #ifndef _GDIPLUSBASE_H } #endif // #ifdef _DEBUG   #define ULONG_PTR DWORD #include <gdiplus.h> #ifdef _MFC_VER #include <afx.h> #endif #undef iterator   using namespace Gdiplus; #pragma comment (lib, "Gdiplus.lib")   class QGdiPlus { public:        QGdiPlus(): m_Token(0)       { Gdiplus::GdiplusStartupInput input; Gdiplus::GdiplusStartup(& m_Token, & input, NULL); }        ~QGdiPlus()        {               Gdiplus::GdiplusShutdown(m_Token); #ifdef _DEBUG #ifdef _MFC_VER               if (nGdiPlusObjects > 0)                      afxDump << _T(">>> GdiPlus Memory Leaks: ") << nGdiPlusObjects << _T(" objects! <<<\n");               else if (nGdiPlusObjects < 0)                      afxDump << _T(">>> GdiPlus Multiple Deletes: ") << -nGdiPlusObjects << _T(" objects! <<<\n"); #endif #ifdef _ATL_VER   #endif #endif        } private:        // The token we get from GDI+        ULONG_PTR m_Token; };       添加完代码之后注意在stdafx.加上一句：#include "QGdiPlus.h" 接着我们在App类里添加一个 QGdiPlus m_GdiPlus，这个对象主要是负责装载gdi+和卸载gdi+。   好了，现在我们开始体会GDI的强大功能吧。   在视图类的OnDraw函数里添加代码，实现显示一个透明字符串。代码如下：   void CUseGdiPlusView::OnDraw(CDC* pDC) {        CUseGdiPlusDoc* pDoc = GetDocument();        ASSERT_VALID(pDoc);        // TODO: add draw code for native data here     HDC hdc = pDC->GetSafeHdc();        Graphics mygraphics(hdc);//´´½¨Ò»¸öGraphics¶ÔÏó     SolidBrush brush(Color(100,0,0,255));//´´½¨Ò»¸ö±ÊË¢ µÚÒ»ÏîÊÇ͸Ã÷¶È ºóÈýÏîÊÇRGBÖµ        FontFamily fontFamily(L"Latha"); //Ñ¡ÔñÒ»ÖÖ×ÖÌå     Font font(&fontFamily,1,FontStyleRegular,UnitInch);     PointF pointF(5,5);       mygraphics.DrawString(L"Hello Word!",-1,&font,pointF,&brush); }        

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