As part of WiiConnect24, channels have the ability to register "tasks" permitting occasional download of any sort of file. For example, the Forecast Channel uses download tasks to update its information when idle. Historically the Wii Shop Channel changed its banner via download tasks.
You use a
var dlTask = new wiiDlTask();
Adds a task to be downloaded.
Requests that one task is deleted. It is unclear how multiple tasks would be handled, if that is even possible.
Verifies the amount of registered tasks is equal to 0.