char szBuffer[256];
UINT nActual = 0;
CFile myFile;

myFile.Write( szBuffer, sizeof( szBuffer ) );
myFile.Seek( 0, CFile::begin );
nActual = myFile.Read( szBuffer, sizeof( szBuffer ) );

这边为什么缓冲区一定要定义成数组形式？
定义成szBuffer 就报错？