48.编写DLL动态链接库__declspec(dllexport)、DllMain生成xxx.dll、xxx.lib和xxx.h、LoadLibrary、GetProcessAddress、Free
自己编写DLL动态链接库文件入加函数和出口函数intWINAPIDllMain(HINSTANCEhInstance,DWORDfdwReason,PVOIDpReason)fdwReason的几个case的情况:#defineDLL_PROCESS_ATTACH1//调用进程时#defineDLL_THREAD_ATTACH2//调用线程时#defineDLL_THREAD_DETACH3//释