Title: How to Remove a dbase index flag
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;