How to use OpenFileDialog?

Hi guys! This is a stupid problem, I guess…

I have a patch working with points, and I wanna save and load them (as 3D coordinates) in a txt file. I wanna open the filedialog everytime I press LOAD or SAVE button.

How can I know when I pressed the Open botton on the OPEN window (on saving)? I have only the path as output, so I can see when I change the path… But what if I don’t change the path? I mean, when the Open window is already on the right file?

https://vvvv.org/sites/default/files/imagecache/large/images/Open_File_2012.08.26-13.27.04.png

p.s. try to open the A.txt file, and save it ad “C.txt”
then open the B.txt file, and try to overwrite the “C.txt”

FileOpenProblem.rar (19.0 kB)