Build Gantt Chart Using Oracle Data

Hi,
I'm using pl/sql to develope a web-based application. I need to create a gantt chart that includes tasks, start date, finish date and percent completion of the tasks. Is there any way to plug the gantt chart automatically by using pl/sql or any Oracle function? The gantt chart should be displayed on Web or opened in spreadsheet or microsoft project when click a link on Web. Please advice. Thanks in advance!

 

I placed the following code in my pl/sql procedure, it opens the microsoft project, but I don't know how to write the data into microsoft project through html in pl/sql procedure.
 
Owa_Util.MIME_HEADER(ccontent_type=>'application/vnd.ms-excel');--'application/msexcel');

Select allOpen in new window