ConnectionManager and SIMManager under WinXP

Hi,

we have developed a software for pocket pc 2003 with phone edition. It is
written in C++ and uses the "Connection Manager" and the "SIM Manager".

Now we want to migrate the software to a notebook with integrated GSM
module. Does anybody know how to substitute these "Managers" under WinXP?
Witch API can we use? Is there any third patry solution available?

Thanks,

Harry

Harry Hirsch