private void button9_Click(object sender, EventArgs e)
        {
            if (contorArbore == 0)
            {
                MessageBox.Show("Nu există o schemă logică reprezentată!", "Eroare de stergere", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            else
            {
                for (int i = 0; i < globalContor; i++)
                {
                    pbArray[i].Image = null;
                    panel4.Controls.Remove(pbArray[i]);
                    pbArray[i] = null;
                }

                for (int i = 0; i < contorArbore; i++)
                {
                    arborePrincipal[i].ID = -2;
                    arborePrincipal[i].ifInchis = false;
                    arborePrincipal[i].whileInchis = false;
                    arborePrincipal[i].DA = false;
                    arborePrincipal[i].endifParentIndex = 0;
                    arborePrincipal[i].coefAdancime = 0;
                    arborePrincipal[i].X = 0;
                    arborePrincipal[i].Y = 0;
                }

                J = 0;
                Initializare_Matrice_Principala();

                contorArbore = 0;
                globalContor = 0;

                activareButoanePanou(start);
                dezactivareButoanePanou(citeste, scrie, prelucrare, interpretare, cat_timp, end, daca, stop);

                for (int i = 0; i < liniiInchidereContor; i++)
                {
                    for (int j = 1; liniiInchidere[i, j] != null; j++)
                    {
                        liniiInchidere[i, j].Image = null;
                        panel4.Controls.Remove(liniiInchidere[i, j]);
                        liniiInchidere[i, j] = null;
                    }
                }
                liniiInchidereContor = 0;

                button4Flag = false; button1Flag = false; button2Flag = false; button3Flag = false;
                button5Flag = false; button6Flag = false; button7Flag = false; button8Flag = false;

                winDeclVar.Dispose();

                winDeclVar = new Form3(this);

                meniuDeclarareVariabile.Items.RemoveAt(0);

                panel4.Refresh();

            }
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            Initializare_Matrice_Principala();
            contorArbore = 0;

            activareButoanePanou(start);
            dezactivareButoanePanou(citeste, scrie, prelucrare, interpretare, cat_timp, end, daca, stop);

            winDeclVar = new Form3(this);
        }