thanks,
procedure TForm1.insertword(Sender: TObject);
var i:integer;
btncap:array[0..17] of char;
btncapstr:string;
begin
btncapstr:=(sender as tspeedbutton).caption;
strcopy(btncap,btncapstr);
memo1.SetSelTextBuf(btncap);
end;
执行strcopy(btncap,btncapstr);报错:incompatible types :'String'and 'Pchar'