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...Remove a dbase index flag?
Autor: Alex Carrillo
[ Print tip ]  

Tip Rating (5):  
     


function UnCheckIndex(FileDbf: string): Boolean;
var
  
Dbf: file;
  Car: Char;
begin
  
Result := T;
  AssignFile(Dbf, FileDbf);
  Car := #0;
  {$I-}
  
Reset(Dbf, 1);
  if not ErrorIO(FileDbf, IoResult) then 
  begin
    
Seek(Dbf, 28);
    {Flag's position}
    
if not ErrorIO(FileDbf, IoResult) then
      
BlockWrite(Dbf, Car, 1, Num_R)
    else
      
Result := F;
    CloseFile(Dbf);
    if ErrorIO(FileDbf, IoResult) then
      
Result := F;
  end
  else
    
Result := F;
  {$I+}
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  if 
UnCheckIndex('MyBase.dbf') then
    
ShowMessage('Flag removed');
end;


 

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