Something

void __fastcall TForm1::Button1Click(TObject *Sender)
{
Skaiciuoti();
Label1->Visible = true;
Label2->Visible = true;
StringGrid1->Enabled = true;
ListBox1->Enabled = true;
Rodyti1();
Memo1->Lines->Add("Matrica A apskaièiuota")
Rodyti2();
Memo1->Lines->Add("Matrica X apskaièiuota")
Rodyti3();
Memo1->Lines->Add("Matrica Y apskaièiuota")
Button1->Enabled = false;
Button2->Enabled = true;
}