Question

When I connect the iPod (or iPhone) to the Windows PC,

it look like an USB drive, but I can’t open a file on it because I can’t know the correct file path.

I was also unable to drop the file to my application because the drag source does not have CF_HDROP.

Some applications can open a file on iPod, but it was a copy on the local temp folder.

screenshot http://img862.imageshack.us/img862/5396/ipodx.png

My question is ..

1. How can I directly (programmatically) open and read the picture file on iPod?

2. If I double click on it (or right click and select Preview menu),

   it launches Windows Photo Viewer — it is not my default picture viewer.

   Can I change the file (.PNG) association to other application?

   What’s the viewer application’s requirement to be a default viewer for files on ipod?

Answer 1

1. Applications that do that use Picture Transfer Protocol (PTP). On Windows Microsoft implements many interfaces as part of Windows Image Acquisition (WIA). Read more here: http://msdn.microsoft.com/en-us/library/ms630344(v=VS.85).aspx

2. http://support.microsoft.com/kb/307859 or manually edit registry at HKEY_CLASSES_ROOT\.png