Can non-UI threads display to the screen?

Is only the UI-thread able to display to the screen, or can oth开发者_如何学JAVAer threads do this as well?

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No you can only access to UI directly from the UI thread but you can marshal the results from other threads, such as using the Control.Invoke or control.BegineInvoke/EndInvoke

Check this out

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You can use the BeginInvoke() member of all GUI controls to change the values of their properties from background threads.
If you are using a backgroundworker you could use the ReportProgress event, which is even easier.

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also Depends if you are using WinForms or WPF, in Winforms you use Control.Invoke and in WPF you use Dispatcher class. WPF has more sophisticated thread UI dispatcher