The following is an example of how to use WFDataGrid:

protected Ascentn.Workflow.WebControls.WFDataGrid WFDataGrid1;

private void ButtonShowProcess_Click(object sender, System.EventArgs e)

{

      // query all process instances for selected process template

      string sql = string.Format("select PROC_INST_NAME, STATUS, LAST_MODIFIED_BY, LAST_MODIFIED_DATE, STARTED_DATE, DUE_DATE, COMPLETED_DATE from WF_PROC_INSTS where DEF_NAME='{0}'", WFProcessTemplateDropDownList2.SelectedItem.Text.ToString() );       

      string xml = this.GetAPI().QueryDatabase(sql);

      DataSet d = new DataSet();

      System.IO.StringReader sr = new System.IO.StringReader(xml);

      System.Xml.XmlTextReader xr = new System.Xml.XmlTextReader(sr);

      if (xml != "<DataSet />")

      {

            d.ReadXml( xr );

      }

      else

      {

            d = null; //reset the datasource and DataGrid

      }

      xr.Close();

      WFDataGrid1.DataSource = d;

      WFDataGrid1.DataBind();

}