(int) = GetParts(nParts)
Retrieve coordinates of the parts in a status bar control.
GetParts() -> Tuple of all coordinates
GetParts(n) -> Tuple of the first n coordinates (or all coordinates, if
fewer than n)
So, in Python, you can't simultaneously find out how many coordinates there are, and retrieve a subset of them. In a reasonable universe, there would have been GetParts() -> int, and GetCoords() -> List. This means that I need to call the MFC method twice; once to find out how many there are, and another time to get them.