textControlFrame->SetSelectionStart(aSelectionStart);
rv = textControlFrame->SetSelectionStart(aSelectionStart);
nsHTMLInputElement::SetSelectionStart(PRInt32 aSelectionStart){  nsIFormControlFrame* formControlFrame = GetFormControlFrame(PR_TRUE);  if (formControlFrame) {    nsCOMPtr<textControlPlace>      textControlFrame(do_QueryInterface(formControlFrame));    if (textControlFrame)      textControlFrame->SetSelectionStart(aSelectionStart);  }  return NS_OK;}