' Needing a Button1; with the focus on it( Use the Tab key).
' can cut and Paste this  example.

PUBLIC SUB Button1_KeyPress()
  IF Key.Shift THEN
    Button1.Text = " True " & CString(Time)
  ELSE
    Button1.Text = " False " & CString(Time)
  ENDIF
END

PUBLIC SUB Form_KeyPress()
' Control KeyPress event will often pass through to this Form event.
  DIM altSet AS Boolean
  TRY altSet = Key.Shift
  altSet = IIf( ERROR , FALSE, altSet)
  IF altSet THEN
    ME.Text = CString(Time) & " True: Control key is being held down"
  ELSE
    ME.Text = CString(Time) & " False: Control key was not held down"
  ENDIF
END