Petras,
Look at the Install.htm file in the VS folder for this topic:
An Internet Connection Dialog Box May Appear at Startup of Windows or Other Applications you have to change 2 registry entries.
>Hi, I've just installed VFP6 (with VStudio6) and the darn thing has changed my PC (Win98) so that it keeps dialing my ISP on bootup and doesn't even have the decency to show the dialup icon so that I could disconnect!! This is costing me money! Please help.