private void btnExport_Click(object sender, EventArgs e)
{
string fileName = Factory.GUIController.ShowSaveFileDialog("Export background as...", GUIController.IMAGE_FILE_FILTER);
if (fileName != null)
{
Bitmap bmp = Factory.NativeProxy.GetBitmapForBackground(_room, cmbBackgrounds.SelectedIndex);
ImportExport.ExportBitmapToFile(fileName, bmp);
bmp.Dispose();
}
}