char, wchar_t,UTF8,UNICODE,GBK转换

//char* to wchar_t
wchar_t wfilename[256] ={0};
char filename[] = {"c://init.properties"};
ulBytes = MultiByteToWideChar(CP_ACP,0,filename,-1,NULL,0);
ulBytes = MultiByteToWideChar(CP_ACP,0,filename,-1,wfilename,ulBytes);
//char* to wchar_