I was looking for a Windows 8 replacement for the PhotoChooserTask from Windows Phone. These doesn't appear to be such a thing, but I can get a long way with the built in CameraCaptureUI and FileOpenPicker.
The CameraCaptureUI has an inbuilt image cropping control, but there isn't an equivalent control that can be used with an image coming out of the FileOpenPicker.
I'd like a control that can be passed a BitmapImage or WriteableBitmap that the user can set the required cropping area on. The resulting cropped image would be returned.
I should be able to specify the target dimensions or aspect ratio for the resulting image.