if (!GetOpenFileName(&Ofn))                 errKind=ekFDia;
else if ((hFile=CreateFile(…))==(HANDLE)-1) errKind=ekOpen;
else if ((ulFileSize=GetFileSize(…))==0xFF) errKind=ekFSiz;
else if (ulFileSize == 0)
{ // braces needed
  if (!ProcessTheFile(lpBuf))               errKind=ekProc;
  else
  {
    // further extensive processing - duplicate of what
    // appears below
  }
}
else if ((lpBuf=GlobalAlloc(...))==NULL)    errKind=ekGAlo;
else if (!ReadFile(hFile,…,&ulBytesRead))   errKind=ekRdFi;
else if (ulBytesRead ==0)                   errKind=ekRdZr;
else if (!ProcessTheFile(lpBuf))            errKind=ekProc;
else
{
  // further extensive processing
}