Текстовое поле и значение поля со списком от формы 2 до от 1

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On form 1 make the code
On form2 make public all textboxex

On form 2
 
Make textbox and other boxes to be public...but...problem is when I chose values on Form2, 
on Form1 give me always value first row in datagreed...not selected value from Form2
 
 Maybe is problem  line 8?
nazivComboBox.Text = lupa.naziv_artiklaTextBox.Text;
Form1 is combo box, on Form 2 is textbox

Просто нужно подобрать значение из textboxex на Form2 и ввести в Form1

Что я уже пробовал:

private void button19_Click(object sender, EventArgs e)  
       {  
  
           artikl_search lupa = new artikl_search();  
           lupa.Show();  
  
           idTextBox1.Text = lupa.idTextBox.Text;  
           nazivComboBox.Text = lupa.naziv_artiklaTextBox.Text;  
           textBox2.Text = lupa.grupa_artikalaTextBox.Text;  
           jedinica_mjereTextBox.Text = lupa.jedinica_mjereTextBox.Text;  
           kolicinaTextBox.Text = lupa.kolicinaTextBox.Text;  
           cijena_bez_pdvTextBox.Text = lupa.cijena_bez_pdvTextBox.Text;  
             
       }  

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