>To config ODBC, how to configure to logon a remote server? Where to place the web server address?
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>If in test period, i don't have any web-based SQL server, where can i share/find one?

SQL Server only have two types: Desktop and Server which runs on Windows 9x and Windows NT/2000 respectively. You may look on MSDE, the lite version of SQL Server which is free.

>or can i configure my home PC as a SQL server to accept modem-to-modem connect? or how to set up my home PC to accept the internet "calls"?

What type of application you are building? What environment? Web-based, Windows-based via RAS or Dial-up?