If this function is used, the Gateway entry in the CHIP.INI becomes invalidated, but unchanged. DefaultGateway() returns the current gateway IP address.
The device handle pointer (InterfaceHandle) is retrievable by Dev_Find_Iface_By_Name().
A list of all installed device drivers is retrievable by Dev_Get_IfaceEntries().
Before setting a new gateway, the old gateway entry must be removed as shown below.