HMODULE hUpdate = BeginUpdateResource(_T("test.exe"), FALSE); 

if (hUpdate != NULL) 

{

	BOOL bResult;

	HANDLE hFile;

	LARGE_INTERGER llLength;

	BYTE *pbIconData;

	DWORD cbIconData;

	DWORD cbReadData;



	hFile = CreateFile(pszIconFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

	bResult = GetFileSizeEx(hFile, &llLength);

	cbIconData = llLength.LowPart;

	pbIconData = new BYTE[cbIconData]();

	bResult = ReadFile(hFile, pbIconData, cbIconData, &cbReadData, NULL);

	CloseHandle(hFile);



	// 修改为对应要更新的图标组 id 和语言

	bResult = UpdateResource(hUpdate, RT_GROUP_ICON, IDI_ICON, MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL), pbIconData, cbIconData);



	EndUpdateResource(hUpdate, FALSE);



	delete[] pbIconData;

}

//////////////////////////////////////////////

//函数说明：修改EXE图标

//

//参    数：lpszIco  新图标文件 

//          lpszApp  被修改的EXE文件

//返回值： 成功为True，否则False

/////////////////////////////////////////////

bool ChangeExeIcon(LPCTSTR lpszApp, LPCTSTR lpszIco)

{

    ICONDIR stID;

    ICONDIRENTRY stIDE;

    GRPICONDIR stGID;

    HANDLE hFile;

    DWORD nSize, nGSize, dwReserved;

    HANDLE hUpdate;

    PBYTE pIcon, pGrpIcon;

    BOOL ret;

//

    hFile = CreateFile(lpszIco, GENERIC_READ, NULL, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

    if (hFile == INVALID_HANDLE_VALUE)

    {

       return false;

    }

//

    ZeroMemory(&stID, sizeof(ICONDIR));

    ret = ReadFile(hFile, &stID, sizeof(ICONDIR), &dwReserved, NULL);

//

    ZeroMemory(&stIDE, sizeof(ICONDIRENTRY));

    ret = ReadFile(hFile, &stIDE, sizeof(ICONDIRENTRY), &dwReserved, NULL);

//

    nSize = stIDE.dwBytesInRes;

    pIcon = (PBYTE)malloc(nSize);

    SetFilePointer(hFile, stIDE.dwImageOffset, NULL, FILE_BEGIN);

    ret = ReadFile(hFile, (LPVOID)pIcon, nSize, &dwReserved, NULL);

    if (!ret)

    {

       CloseHandle(hFile);

       return false;

    }

//

    ZeroMemory(&stGID, sizeof(GRPICONDIR));

    stGID.idCount = stID.idCount;

    stGID.idReserved = 0;

    stGID.idType = 1;

    CopyMemory(&stGID.idEntries, &stIDE, 12);

    stGID.idEntries.nID = 0;

//

    nGSize = sizeof(GRPICONDIR);

    pGrpIcon = (PBYTE)malloc(nGSize);

    CopyMemory(pGrpIcon, &stGID, nGSize);

//

    hUpdate = BeginUpdateResource(lpszApp, false);

	if(!hUpdate)

	{

		DWORD Err=GetLastError();// 2 ERROR_FILE_NOT_FOUND

	}

    ret = UpdateResource(hUpdate,RT_GROUP_ICON,MAKEINTRESOURCE(1),0,(LPVOID)pGrpIcon, nGSize);

    if (!ret)

    {

       CloseHandle(hFile);

       return false;

    }

    ret = UpdateResource(hUpdate, RT_ICON, MAKEINTRESOURCE(1),0,(LPVOID)pIcon, nSize);

    if (!ret)

    {

       CloseHandle(hFile);

       return false;

    }

	EndUpdateResource(hUpdate, false);

//

    CloseHandle(hFile);

    return true;

}

#include <windows.h>

#include <tchar.h>



typedef struct tagHEADER      

{      

    WORD idReserved;      

    WORD idType;      

    WORD idCount;      

}HEADER, *LPHEADER;      



typedef struct tagICONDIRENTRY      

{      

    BYTE bWidth;      

    BYTE bHeight;      

    BYTE bColorCount;      

    BYTE bReserved;      

    WORD wPlanes;      

    WORD wBitCount;      

    DWORD dwBytesInRes;      

    DWORD dwImageOffset;      

}ICONDIRENTRY, *LPICONDIRENTRY;      



#pragma pack( push )      

#pragma pack( 2 )      

typedef struct tagGRPICONDIRENTRY      

{      

    BYTE bWidth;      

    BYTE bHeight;      

    BYTE bColorCount;      

    BYTE bReserved;      

    WORD wPlanes;      

    WORD wBitCount;      

    DWORD dwBytesInRes;      

    WORD nID;      

}GRPICONDIRENTRY, *LPGRPICONDIRENTRY;;      



typedef struct tagGRPICONDIR      

{      

    WORD idReserved;      

    WORD idType;      

    WORD idCount;      

    GRPICONDIRENTRY idEntries[1];      

}GRPICONDIR, *LPGRPICONDIR;      

#pragma pack( pop )     

 

 

//.CPP文件中的主要代码：

//view plaincopy to clipboardprint?

void ChangeExeIcon(LPCTSTR lpIconFile, LPCTSTR lpExeName) 

{      

    LPICONDIRENTRY pIconDirEntry(NULL);      

    LPGRPICONDIR pGrpIconDir(NULL);      

    HEADER header;      

    LPBYTE pIconBytes(NULL);      

    HANDLE hIconFile(NULL);      

    DWORD dwRet(0), nSize(0), nGSize(0), dwReserved(0);      

    HANDLE hUpdate(NULL);      

    BOOL ret(FALSE);      

    WORD i(0);      

    

    //打开图标文件      

    hIconFile = CreateFile(lpIconFile, GENERIC_READ, NULL, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);      

    if (hIconFile == INVALID_HANDLE_VALUE)      

    {      

        return;      

    }      

    //读取文件头部信息      

    ret=ReadFile(hIconFile, &header, sizeof(HEADER), &dwReserved, NULL);      

    if (!ret)      

    {      

        CloseHandle(hIconFile);      

        return;      

    }      

    //建立每一个图标的目录信息存放区域      

    pIconDirEntry = (LPICONDIRENTRY)new BYTE[header.idCount*sizeof(ICONDIRENTRY)];      

    if (pIconDirEntry==NULL)      

    {      

        CloseHandle(hIconFile);      

        return;      

    }      

    //从Icon文件中读取每一个图标的目录信息      

    ret = ReadFile(hIconFile, pIconDirEntry, header.idCount*sizeof(ICONDIRENTRY), &dwReserved, NULL);      

    if (!ret)      

    {      

        delete[] pIconDirEntry;   

        CloseHandle(hIconFile);      

        return;      

    }      

    //建立EXE文件中RT_GROUP_ICON所需的数据结构存放区域      

    nGSize=sizeof(GRPICONDIR)+header.idCount*sizeof(ICONDIRENTRY);      

    pGrpIconDir=(LPGRPICONDIR)new BYTE[nGSize];   

    ZeroMemory(pGrpIconDir, nSize);

    //填充信息，这里相当于一个转换的过程      

    pGrpIconDir->idReserved=header.idReserved;      

    pGrpIconDir->idType=header.idType;      

    pGrpIconDir->idCount=header.idCount;      

    //复制信息并设置每一个图标对应的ID。ID为位置索引号      

    for(i=0;i<header.idCount;i++)      

    {      

        pGrpIconDir->idEntries[i].bWidth=pIconDirEntry[i].bWidth;      

        pGrpIconDir->idEntries[i].bHeight=pIconDirEntry[i].bHeight;      

        pGrpIconDir->idEntries[i].bColorCount=pIconDirEntry[i].bColorCount;      

        pGrpIconDir->idEntries[i].bReserved=pIconDirEntry[i].bReserved;      

        pGrpIconDir->idEntries[i].wPlanes=pIconDirEntry[i].wPlanes;      

        pGrpIconDir->idEntries[i].wBitCount=pIconDirEntry[i].wBitCount;      

        pGrpIconDir->idEntries[i].dwBytesInRes=pIconDirEntry[i].dwBytesInRes;      

        pGrpIconDir->idEntries[i].nID=i+1;    //id  == 0 是 RT_GROUP_ICON 的id，我这里替换的时候出现问题，所以就 + 1 了。  

    }      

    //开始更新EXE中的图标资源，ID定为最小０，如果原来存在０ID的图标信息则被替换为新的。      

    hUpdate = BeginUpdateResource(lpExeName, false);      

    if (hUpdate!=NULL)      

    {      

        HMODULE hMe= 0; // means load from this module



        if (FindResource( hMe, lpExeName, RT_GROUP_ICON))

        {

            //首先更新RT_GROUP_ICON信息       

            ret = UpdateResource(hUpdate, RT_GROUP_ICON, MAKEINTRESOURCE(0), MAKELANGID(LANG_CHINESE, SUBLANG_SYS_DEFAULT), (LPVOID)pGrpIconDir, nGSize);      

            if (!ret)      

            {       

                delete[] pIconDirEntry;

                delete[] pGrpIconDir;  

                CloseHandle(hIconFile);      

                return;      

            }      

        }



        //接着的是每一个Icon的信息存放      

        for(i=0;i<header.idCount;i++)      

        {      

            //Icon的字节数      

            nSize = pIconDirEntry[i].dwBytesInRes;      

            //偏移文件的指针到当前图标的开始处      

            dwRet=SetFilePointer(hIconFile, pIconDirEntry[i].dwImageOffset, NULL, FILE_BEGIN);      

            if (dwRet==INVALID_SET_FILE_POINTER)      

            {      

                break;      

            }      

            //准备pIconBytes来存放文件里的Byte信息用于更新到EXE中。

            

            delete[] pIconBytes;

            

            pIconBytes = new BYTE[nSize];  

            ZeroMemory(pIconBytes, nSize);

            ret = ReadFile(hIconFile, (LPVOID)pIconBytes, nSize, &dwReserved, NULL);      

            if(!ret)      

            {      

                break;      

            }      

            //更新每一个ID对应的RT_ICON信息      

            ret = UpdateResource(hUpdate, RT_ICON, MAKEINTRESOURCE(pGrpIconDir->idEntries[i].nID), MAKELANGID(LANG_CHINESE, SUBLANG_SYS_DEFAULT), (LPVOID)pIconBytes, nSize);      

            if(!ret)      

            {      

                break;      

            } 

        }      

        //结束EXE资源的更新操作      

        if (pIconBytes!=NULL)      

        {      

           delete[] pIconBytes;

        }      



        EndUpdateResource(hUpdate, false);      

    }    

    

    //清理资源并关闭Icon文件，到此更新操作结束！

    SAFE_ARRAY_DELETE(pGrpIconDir); 

    SAFE_ARRAY_DELETE(pIconDirEntry);       

    CloseHandle(hIconFile);      

}