I have a windows mobile 6 application using TAPI 2.0. lineGetAddressID() is needed to get the address identifier used by several calls in the telephone api, but I can't get it to work.

I have tried the following to no avail:

HLINE line; // valid handle from lineOpen();
DWORD addr_id = 0;
result = ::lineGetAddressID( line, &addr_id, LINEADDRESSMODE_DIALABLEADDR, L"1234", 5 );
result = ::lineGetAddressID( line, &addr_id, LINEADDRESSMODE_DIALABLEADDR, L"5551234", 8 );
result = ::lineGetAddressID( line, &addr_id, LINEADDRESSMODE_DIALABLEADDR, L"1115551234", 11 );
result = ::lineGetAddressID( line, &addr_id, LINEADDRESSMODE_DIALABLEADDR, L"11115551234", 12 );

All of them return LINEERR_INVALADDRESS. Can anybody point out what I may be doing wrong?

As a side question, how can I programmaticly get the address? It appears in the LINEADDRESSCAPS structure returned by lineGetAddressCaps(), but that requires an address identifier (which would need to come from lineGetAddressID(), which requires an address...).

Note: I realize I could use 0 as the address ID and it will probably work, but I have no guarantee it will work for every platform. I would like to get this solved 'right'.

Thanks, PaulH