[ VC(Visual C++) ]-DLL系列(03_抓抓圖)

[ VC(Visual C++) ]-DLL系列(03_抓抓圖)

本篇分享抓抓圖DLL，有興趣的(C/P)同好，歡迎來http://filemarkets.com/file/jashliao/753c17ea/索取，因為我不會上傳檔案分享哈哈 ^ ^。

主要程式碼:

// DC2DC.cpp : Defines the initialization routines for the DLL. //   #include "stdafx.h" #include "DC2DC.h" #include "DibSection.h" #include <stdlib.h> #ifdef _DEBUG #definenew DEBUG_NEW #undef THIS_FILE staticchar THIS_FILE[] = __FILE__; #endif int n; char str1[10]; // //    Note! // //        If this DLL is dynamically linked against the MFC //        DLLs, any functions exported from this DLL which //        call into MFC must have the AFX_MANAGE_STATE macro //        added at the very beginning of the function. // //        For example: // //        extern "C" BOOL PASCAL EXPORT ExportedFunction() //        { //            AFX_MANAGE_STATE(AfxGetStaticModuleState()); //            // normal function body here //        } // //        It is very important that this macro appear in each //        function, prior to any calls into MFC.  This means that //        it must appear as the first statement within the //        function, even before any object variable declarations //        as their constructors may generate calls into the MFC //        DLL. // //        Please see MFC Technical Notes 33 and 58 for additional //        details. //   ///////////////////////////////////////////////////////////////////////////// // CDC2DCApp   BEGIN_MESSAGE_MAP(CDC2DCApp, CWinApp)     //{{AFX_MSG_MAP(CDC2DCApp)         // NOTE - the ClassWizard will add and remove mapping macros here.         //    DO NOT EDIT what you see in these blocks of generated code!     //}}AFX_MSG_MAP END_MESSAGE_MAP()   ///////////////////////////////////////////////////////////////////////////// // CDC2DCApp construction   CDC2DCApp::CDC2DCApp() {     // TODO: add construction code here,     // Place all significant initialization in InitInstance     n=0; }   ///////////////////////////////////////////////////////////////////////////// // The one and only CDC2DCApp object void EXPORTED_DLL_FUNCTION DC2DC (long GetHDC,long w,long h) {     long Width,Height;     long x,y;     long R,G,B;     CString  str2;     itoa(n,str1,10);     n++;     str2=str1;     str2=str2+".bmp";     CDibSection testDib;     CDibSection testDib1;     testDib.Create(w,h,24);     Width=testDib.Width();     Height=testDib.Height();     testDib1.Create(Width,Height,24);     BitBlt(CDibDC(testDib),0,0,w/1,h/1,(HDC)GetHDC,0,0,SRCCOPY);     for(x=0;x<Width;x++)     {         for(y=0;y<Height;y++)         {             BYTE *q1=(BYTE *)testDib.GetBits(x,y);//利用物件本身所提供之成員函數取得一個像素的 R,G,B(指標用法)             BYTE *q=(BYTE *)testDib1.GetBits(x,y);//利用物件本身所提供之成員函數取得一個像素的 R,G,B(指標用法)             B=*q1++;             G=*q1++;             R=*q1++;             *q++=(0.299*R+0.587*G+0.114*B);             *q++=(0.299*R+0.587*G+0.114*B);             *q++=(0.299*R+0.587*G+0.114*B);         }     }     testDib1.SaveBmp("test1.bmp");     testDib.SaveBmp(str2.GetBuffer(0)); } CDC2DCApp theApp;