GetFileSize usage (including the use of the format string)

 1 void CGetFileSizeDlg::OnBnClickedButton1()
 2 {
 3     CString strFile;
 4     GetDlgItemText(IDC_EDIT1, strFile);
 5     DWORD dwHigh = 0;//(文件大小超过4GB)存放33-64位高位
 6     DWORD dwLow = 0;//存放1-32位低位
 7     HANDLE hFile = CreateFile(strFile, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
 8     if (hFile == INVALID_HANDLE_VALUE) {
 9         DWORD errCode = GetLastError();
10         SzErr CString;
 . 11          szErr.Format (_T ( " ! Some errors in the CreateFile error code is D% " ), errCode);
 12 is          the MessageBox (szErr);
 13 is          the CloseHandle (hFile);
 14          return ;
 15      }
 16      dwLow = the GetFileSize (hFile, & dwHigh);
 . 17      the LONGLONG Ltotal = ((the LONGLONG) dwHigh << 32 ) | dwLow; // to form the final 8-byte file size LONGLONG (INT64) type number 
18 is      DOUBLE dbTotal = (DOUBLE) Ltotal;
 . 19      DOUBLE kbSize = dbTotal / 1024 ;
 20 is      DOUBLE mbSize dbTotal = / (1024 * 1024 );
 21 is      DOUBLE gbSize = dbTotal / ( 1024 * 1024 * 1024 );
 22 is      CString the cbSize;
 23 is      cbSize.Format (_T ( " file size% lld bytes (% 0.2fKB,% 0.2fMB,% 0.2fGB ) " ), Ltotal, kbSize, mbSize, gbSize);
 24      the MessageBox (the cbSize);
 25      the CloseHandle (hFile);
 26 is      return ;
 27 }