Exporting Images with the Autodesk Revit API

I tried to find some sample code for using the Document.ExportImage method in Autodesk Revit 2011 but couldn't find any. So I wrote my own sample code and posted it on the RevitPythonShell wiki as a featured script. I'd like to share it here too:

'''
exportImage.py

Export the currently visible view as a PNG image to a location specified by the user.
'''
import clr
clr.AddReference('RevitAPI')
from Autodesk.Revit.DB import *

doc = __revit__.ActiveUIDocument.Document

# collect file location from user
clr.AddReference('System.Windows.Forms')
from System.Windows.Forms import DialogResult, SaveFileDialog
dialog = SaveFileDialog()
dialog.Title = 'Export current view as PNG'
dialog.Filter = 'PNG files (*.PNG)|*.PNG'

if dialog.ShowDialog() == DialogResult.OK:
    # set up the export options
    options = ImageExportOptions()
    options.ExportRange = ExportRange.VisibleRegionOfCurrentView
    options.FilePath = dialog.FileName
    options.HLRandWFViewsFileType = ImageFileType.PNG
    options.ImageResolution = ImageResolution.DPI_72
    options.ZoomType = ZoomFitType.Zoom
    options.ShadowViewsFileType = ImageFileType.PNG

    doc.ExportImage(options)

__window__.Close()

The above code does some stuff necessary for any canned command in RPS: It adds references to the RevitAPI and imports the Autodesk.Revit.DB types. I also open a SaveFileDialog using code found here: http://www.ironpython.info/index.php/SaveFileDialog.