WxStretch

enum wxStretch
{
    wxSTRETCH_NOT             = 0x0000,
    wxSHRINK                  = 0x1000,
    wxGROW                    = 0x2000,
    wxEXPAND                  = wxGROW,
    wxSHAPED                  = 0x4000,
    wxTILE                    = wxSHAPED | wxFIXED_MINSIZE,

    /*  a mask to extract stretch from the combination of flags */
    wxSTRETCH_MASK            = 0x7000 /* sans wxTILE */
};