[MSDN Library June 1998] Use the Canonical/International Form for the Number Dialed in Telephony-Enabled Applications (23.9331723027375%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > Windows Logo and Programming Guidelines > Logo Requirements, Recommendations, and Best Practices > Provide Consistent, Up-To-Date Windows Support > Telephony
[MSDN Library June 1998] Use the Dialing Properties Current Location Settings in Telephony-Enabled Applications (23.4528891884807%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > Windows Logo and Programming Guidelines > Logo Requirements, Recommendations, and Best Practices > Provide Consistent, Up-To-Date Windows Support > Telephony
[MSDN Library June 1998] Use the Assisted Telephony Interface in Telephony-Enabled Applications (22.6012678324375%)
MSDN Library Visual Studio 6.0 > Platform SDK > Windows Programming Guidelines > Windows Logo and Programming Guidelines > Logo Requirements, Recommendations, and Best Practices > Provide Consistent, Up-To-Date Windows Support > Telephony