+\docparam{sizer}{The (child-)sizer to be added to the sizer. This allows placing a child sizer in a
+sizer and thus to create hierarchies of sizers (typically a vertical box as the top sizer and several
+horizontal boxes on the level beneath).}
+
+\docparam{width and height}{The dimension of a spacer to be added to the sizer. Adding spacers to sizers
+gives more flexilibilty in the design of dialogs; imagine for example a vertical box with two buttons at the
+bottom of a dialog: you might want to insert a space between the two buttons and make that space stretchable
+using the {\it option} flag and the result will be that the left button will be aligned with the left
+side of the dialog and the right button with the right side - the space in between will shrink and grow with
+the dialog.}
+
+\docparam{option}{Although the meaning of this parameter is undefined in wxSizer, it is used in wxBoxSizer
+to indicate if a child of a sizer can change its size in the main orientation of the wxBoxSizer - where
+0 stands for not changable and a value of more than zero in interpreted relative to the value of other
+children of the same wxBoxSizer. You might, e.g., have a horizontal wxBoxSizer with three children, two
+of which are supposed to change their size with the sizer, then the two stretchable windows would get a
+value of 1 each to make them grow and shrink equally with the sizer's horizontal dimension.}
+
+\docparam{flag}{This parameter can be used to set a number of flags which can be combined using
+the binary OR operator |. Two main behaviours are defined using these flags: One is the border
+around a window: the {\it border} parameter determines the border width whereas the flags given here
+determine where the border may be (wxTOP, wxBOTTOM, wxLEFT, wxRIGHT or wxALL). The other flags
+determine the child window's behaviour if the size of the sizer changes, but - in contrast to
+the {\it option} flag - not in the main orientation, but the respectively other orientation. So
+if you created a wxBoxSizer with the wxVERTICAL option, these flags will be relevant if the
+sizer changes its horizontal size. A child may get resized to completely fill out the new size (using
+either wxGROW or wxEXPAND), may get proportionally resized (wxSHAPED), may get centered (wxALIGN\_CENTER
+or wxALIGN\_CENTRE) or may get aligned to either side (wxALIGN\_LEFT and wxALIGN\_TOP are set to 0
+and thus represent the default, wxALIGN\_RIGHT and wxALIGN\_BOTTOM have their obvious meaning).
+With proportional resize, a child may also be centered in the main orientation using
+wxALIGN\_CENTER\_VERTICAL (same as wxALIGN\_CENTRE\_VERTICAL) and wxALIGN\_CENTER\_HORIZONTAL
+(same as wxALIGN\_CENTRE\_HORIZONTAL) flags.}
+
+\docparam{border}{Determines the border width, if the {\it flag} parameter is set to any border.}
+
+\docparam{userData}{Allows an extra object to be attached to the sizer
+item, for use in derived classes when sizing information is more
+complex than what {\it option} and {\it flag} will allow for.}
+
+\membersection{wxSizer::Prepend}\label{wxsizerprepend}