Export output of the report in excel programatically

Hi

I think subject itself is more explanatory .

i need to Export the output of the report in excel programatically.

I know that i can use gui_download FM .

But i m dynamically printing my report so i dont have the perfect internal table. thjats why i can not use gui_download.

Hope u got it .

Each person will get the point depend on the ans

Thaks

Gain_ponits