[pdftex] how to include excell graphs in pdfTeX

[Marcio Froelich Friedrich]

Good morning/evening,
 
I need to include a lot of excell graphs in my latex document. Until now, I have done printscreen and pasted it in an image editor to save as .png.
Of course I loose a lot of quality doing this. I tried saving the graphs as .pdf files using OpenOfice, but then the graphs have texts messed up when included in the latex file.
 
Could anyone tell me a better way?
 
Thank you,
 
Márcio F. Friedrich