function CreateInstance($_instance = null)
{
if ($_instance === null) {
$_instance = new GridPercentageColumn();
}
parent::CreateInstance($_instance);
$_instance->MaxValue = $this->MaxValue;
$_instance->BackCss = $this->BackCss;
$_instance->FrontCss = $this->FrontCss;
$_instance->BarWidth = $this->BarWidth;
$_instance->BarHeight = $this->BarHeight;
$_instance->BackColor = $this->BackColor;
$_instance->FrontColor = $this->FrontColor;
return $_instance;
}