To make invisible the gadgets owned by a frame, you can set the visible status of the frame to false. Conversely, to make them visible again you can set the visible status to true.

The frame’s visible property will automatically apply to all of its children, but will not overwrite their corresponding property values.

So, for example, if frame .f1 contains button .b1 and f1 and b1 both have Visible = true.