vert_sizer->AddStretchSpacer(1);
ctrl_sizer_item = vert_sizer->Add(item.window, 0, wxEXPAND);
vert_sizer->AddStretchSpacer(1);
vert_sizer->AddStretchSpacer(1);
ctrl_sizer_item = vert_sizer->Add(item.window, 0, wxEXPAND);
vert_sizer->AddStretchSpacer(1);