private void showQuestionDefinition(Parser.Question q)
{
if (this.qUIDef == null)
this.qUIDef = new QuestionUIDefinition();
this.qUIDef.SetQuestion(q);
this.qUIDef.Dock = DockStyle.Fill;
this.pnlDefinition.Controls.Clear();
this.pnlDefinition.Controls.Add(this.qUIDef);
}