src/Web/ClientProxy.php
public function showPopup($baseForm, $popupForm, $ctrlName = "")
    {
        if ($this->isRpc) {
            $function = $baseForm . ".ShowPopup(" . $popupForm . "," . $ctrlName . ")";
            $this->_otherOutput[] = $this->callClientFunction("CallFunction('$function','Popup')");
        }
    }
public function showPopup($baseForm, $popupForm, $ctrlName = "")
    {
        if ($this->isRpc) {
            $function = $baseForm . ".ShowPopup(" . $popupForm . "," . $ctrlName . ")";
            $this->_otherOutput[] = $this->callClientFunction("CallFunction('$function','Popup')");
        }
    }
Show popup window

@param string $baseForm
@param string $popupForm
@param string $ctrlName
@return void