visual c++ - How to change the top of the focus rect in C++ -

i using cbutton create checkbox:

cbutton foo;  foo.create("this foo", ws_child | ws_visible | ws_tabstop | bs_autocheckbox | bs_multiline | bs_top , crect(0,0,0,0), this, foo_id); 

and using drawtext function set multiline , size of rect checkbox.

pdc->drawtext("this foo", -1, rect, dt_left| dt_wordbreak | dt_noprefix | dt_calcrect );     csize csize = (rect.width(), rext.height())    foo.movewindow(left_space, -1, csize.cx + 5, csize.cy); 

but focus rectangle of checkbox cropped @ top:

any idea how fix this?