Freind, Please either use the window hook key event or override the existing implementation of Ctrl+V and customize your code accordingly on keydown event. please let me know if you want any thing else.
Friend, please find the code for same also use the true block to generate your custom event.
private void textBox1_KeyDown(object sender, KeyEventArgs e)
if (e.Control && e.KeyValue == 86)
e.Handled = true;
e.SuppressKeyPress = true;
please vote if this solution is accepted or relevant for you.