This example copies the selection in window one to the Clipboard and then pastes it into the view in window two. If the Clipboard contents cannot be pasted into the view in window two — for example, if you try to paste a shape into slide sorter view — this example fails.
Windows(1).Selection.Copy
Windows(2).View.PasteThis example copies shapes one and two on slide one in the active presentation to the Clipboard and then pastes the copies onto slide two.
With ActivePresentation
    .Slides(1).Shapes.Range(Array(1, 2)).Copy
    .Slides(2).Shapes.Paste
End WithThis example copies slide one in the active presentation to the Clipboard.
ActivePresentation.Slides(1).CopyThis example copies the text in shape one on slide one in the active presentation to the Clipboard.
ActivePresentation.Slides(1).Shapes(1).TextFrame.TextRange.Copy