How to return the string from class to textbox

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C#

Hello friends,

I have created a datagridview at runtime using the createdatagrid() function passing some values and created the keypress event of that datagridview.
In that keypress event I set the selected row to the textbox when user presses the enter key i.e 13.

The above mentioned functionality works fine.

Now I want to make it at class level.

For e.g. I want to pass the textbox5 value to the createdatagrid() or filldata and then display the result back to the textbox5.

Note: I have successfully passed other values but I don't understand how to pass the value of textbox5 and how should I take the result back from function.

Following is the code
Please help me.

Thank you.

public void createdatagrid(int left,int top,int width,int height,)
  {
      dgvnew = new DataGridView();
      dgvnew.Left = left;
      dgvnew.Top = top;
      dgvnew.Size = new System.Drawing.Size(width,height);
      dgvnew.ReadOnly = true;
      dgvnew.RowHeadersWidth = 5;
      dgvnew.ScrollBars = ScrollBars.Vertical;
      this.Controls.Add(dgvnew);
      dgvnew.KeyPress += new KeyPressEventHandler(dgvnew_KeyPress);
  }
  public void filldata(string spname)
  {
      //fill datagirdview
      dsdgv = new DataSet();
      dsdgv = clsobj.getDataset(spname);
      dgvnew.DataSource = dsdgv.Tables[0];
      dgvnew.AutoSize = false;
      for (int i = 0; i < dsdgv.Tables[0].Rows.Count - 1; i++)
          dgvnew.AutoResizeColumn(i);
          dgvnew.Show();
  }
  void dgvnew_KeyPress(object sender, KeyPressEventArgs e)
  {
      if (e.KeyChar == 13)
      {
          textBox5.Text = dgvnew.Rows[dgvnew.CurrentRow.Index - 1].Cells[0].Value.ToString();
          dgvnew.Hide();
      }
  }
  private void textBox5_TextChanged_1(object sender, EventArgs e)
  {
      createdatagrid(550, 172, 300, 200);
      filldata("SP_PC");
  }

[EDIT] Edited for grammar and spelling [/EDIT]