dll 中FindResource

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以下的代码在EXE中，执行无误。可是在DLL中FindResource返回的值就为0了，我用::GetLastError()，得出的值是1813，也就是取不到资源，这是为什么？
BOOL ExtractFile(char *szZlibFile,DWORD    dwRID)
{
    HANDLE    hFile = NULL ;
    HRSRC    hRsrc = NULL ;
    HGLOBAL hGlobal = NULL ;

    DWORD    dwResSize = 0, dwBytesWrite = 0, dwBytesRead = 0;
    PVOID    pRsrc = NULL, pConfigEncrypt = NULL;
    hRsrc = FindResource( NULL, MAKEINTRESOURCE(dwRID), "ZLIB");
    if(hRsrc == NULL)
    {
        MyDbgPrint("[ExtractFile] Locate Resource Error: %d/n", GetLastError());
        return FALSE;
    }

dwResSize = SizeofResource(NULL, hRsrc);

    hGlobal = LoadResource(NULL, hRsrc);
    if(hGlobal == NULL)
    {
        MyDbgPrint("[ExtractFile] Load Resource Error: %d/n", GetLastError());
        return FALSE;
    }

pRsrc = LockResource(hGlobal);

    hFile = CreateFile( szZlibFile , GENERIC_ALL, 0, NULL, Create_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if(hFile == INVALID_HANDLE_VALUE)
    {
        MyDbgPrint("[ExtractFile] Create %s File Error: %d/n", szZlibFile , GetLastError());
        return FALSE;
    }

    if( WriteFile( hFile, pRsrc, dwResSize, &dwBytesWrite, NULL) == FALSE)
    {
        MyDbgPrint("[ExtractFile] Write %s File Error: %d/n", szZlibFile , GetLastError());
        return FALSE;
    }
    CloseHandle(hFile);
    MyDbgPrint("[ExtractFile] Write %s File Success/n",szZlibFile);
    return TRUE;

}
问题出在FindResource的第一个参数取得的HINSTANCE句柄是EXE的HINSTANCE句柄，自然在其中也找不到在DLL中引入的ZLIB这个位图ID了.同时SizeofResource,LoadResource中的第一个参数也应该是DLL的句柄.

解决方法如下:
BOOL ExtractFile(char *szZlibFile,DWORD    dwRID)
{
    HANDLE    hFile = NULL ;
    HRSRC    hRsrc = NULL ;
    HGLOBAL hGlobal = NULL ;

    DWORD    dwResSize = 0, dwBytesWrite = 0, dwBytesRead = 0;
    PVOID    pRsrc = NULL, pConfigEncrypt = NULL;
    HINSTANCE hInst = GetModuleHandle( dll的路径 );
    hRsrc = FindResource( hInst , MAKEINTRESOURCE(dwRID), (LPCTSTR)"ZLIB");
    if(hRsrc == NULL)
    {
        return FALSE;
    }

dwResSize = SizeofResource( hInst , hRsrc);

    hGlobal = LoadResource( hInst , hRsrc);
    if(hGlobal == NULL)
    {
        return FALSE;
    }

pRsrc = LockResource(hGlobal);

    hFile = CreateFile( szZlibFile , GENERIC_ALL, 0, NULL, Create_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
    if(hFile == INVALID_HANDLE_VALUE)
    {
        return FALSE;
    }

    if( WriteFile( hFile, pRsrc, dwResSize, &dwBytesWrite, NULL) == FALSE)
    {
        return FALSE;
    }
    CloseHandle(hFile);
    return TRUE;
}

本文转载自『Osa's Blog 阳广元博客』:http://www.801314.net/article.asp?id=167