The StretchMonthImages property determines whether or not the bitmaps defined in the
MonthImages array are stretched to fit the calendar area. This property is only valid if the
ShowMonthImages property is set to true.
If this property is set to false, the bitmaps from MonthImages will be displayed in one of
two ways: If the bitmap is smaller than the current calendar area, it will be centered.
If the bitmap is larger (in width or height) than the current calendar area, it will be
drawn from the upper left corner of the calendar area. The latter of these two options
will cut off part of the displayed bitmap.
