Even though Microsoft released a Knowledge base article that states that it’s not possible to
put a button over another button without the creation of a special control. It seems that by adding a
control's style the following styles:
WS_CLIPSIBLINGS | WS_CLIPCHILDREN
(You should modify this by either creating a CButtoEx class and overriding the PreSubclassWindow() event
to modify this style, or in your dialog OnInitDialog() event modify this style)
A control can be made to not draw over his "overlapping" controls.
Of course this isn't enough you still need to make Dialog Editor know you want one control over the other,
by making sure the up most controls are created after the down most control.
Meaning that you need to be visually seeing in the Dialog Editor that the up most controls are over their
down most control.