close
public
FInput:String;
{ Public declarations }
var
mInput:WideChar;
begin
mInput := TSpeedButton(Sender).Text[1];
if mInput = '<' then
begin
Delete(FInput,Length(FInput),1);
end else
if mInput = 'X' then
begin
FInput := '';
end else
if True then
begin
FInput := FInput + mInput;
end;
Text1.Text := FInput;
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