char filename[20];
CString filesize;
GetDlgItem(IDC_EDITFileName)->GetWindowText(m_FileName);

strcpy(filename,(LPCTSTR)m_FileName);

int handle;
int Byte;
handle=open(filename,O_RDONLY);
Byte=filelength(handle);
//m_FileSize=Byte;
filesize=(CString)Byte;
GetDlgItem(IDC_EDITFileSize)->SetWindowText(filesize);
我想通过m_FileName得到一个该文件的长度,并在IDC_EDITFileSize框中的显示出来,为什么办不到呢?请指教!