Curtains Closed – Harry Potter Lexicon

"I'd rather not be interrupted ...or watched..."
-- Minister for Magic Rufus Scrimgeour to the Muggle Prime Minister, closing the curtains with a wave of his wand (HBP1)

Closing curtains with a wave of a wand.

References from the canon

Scrimgeour closes the curtains in the office of the Muggle Prime Minister for privacy (HBP1).
Poppy Pomfrey closes curtains around the hospital beds (HBP19).
When Harry closed the curtains around Mrs. Black's portrait at Grimmauld Place while yelling "Shut up!" his wand emitted a "Bang!" and red sparks (DH9).