IVsTextBuffer::UnlockBuffer Method ()

Return Value

If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Starting in Visual Studio 2010, you should access the text buffer on the UI thread, not on background threads. The text buffer no longer gets locked when you call LockBuffer or LockBufferEx. Similarly, the UnlockBuffer and UnlockBufferEx methods no longer have any effect.