wxCHECK_RET( nodeThis, _T("radio button not a child of its parent?") );
// if it's not the first item of the group ...
if ( !HasFlag(wxRB_GROUP) )
{
// ... turn off all radio buttons before it
wxCHECK_RET( nodeThis, _T("radio button not a child of its parent?") );
// if it's not the first item of the group ...
if ( !HasFlag(wxRB_GROUP) )
{
// ... turn off all radio buttons before it