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delphi TFileStream.create

Value 

Meaning 

fmCreate  

Create a file with the given name. If a file with the given name exists, open the file in write mode.  

fmOpenRead  

Open the file for reading only.  

fmOpenWrite  

Open the file for writing only. Writing to the file completely replaces the current contents.  

fmOpenReadWrite  

Open the file to modify the current contents rather than replace them.  

fmShareCompat  

Sharing is compatible with the way FCBs are opened.  

fmShareExclusive  

Other applications can not open the file for any reason.  

fmShareDenyWrite  

Other applications can open the file for reading but not for writing.  

fmShareDenyRead  

Other applications can open the file for writing but not for reading.  

fmShareDenyNone  

No attempt is made to prevent other applications from reading from or writing to the file.  

The share mode must be one of the following values:

Value 

Meaning 

fmShareCompat  

Sharing is compatible with the way FCBs are opened.  

fmShareExclusive  

Other applications can not open the file for any reason.  

fmShareDenyWrite  

Other applications can open the file for reading but not for writing.  

fmShareDenyRead  

Other applications can open the file for writing but not for reading.  

fmShareDenyNone  

No attempt is made to prevent other applications from reading from or writing to the file.