Merging my Appbar with Windows Taskbar

I have created my own custom Desktop Application bar (AppBar) using
Visual Studio 6.0 as Dialog based project under windows 98
platform.

The major function which I have used was SHAppBarMessage()
and used various attributes required.

It is working fine on all corners of the window. But I could
not able to merge my AppBar with Windows TaskBar. But I have
seen some applications getting merged with the taskbar.I just
want to know how it can be done. What is the concept behind this.

Hence I request to guide me how it can be done. or any study materials
or sample code which you feel that could resolve my issue.

Thaking You and looking forward for your reply.

Ashok V.