[R] Setting intial path under windows to MyComputer in Interactive file browser

[Laetitia Marisa]

Hello everyone,

How can I specify in tcltk file browser the initial directory to 
"MyComputer" in Windows where Drives and Partition are accessible?

And just a little question if anyone knows, is there a way to use the 
function choose.files under windows to select a directory?

Thanks a lot for your help.

Laetitia.