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Capabilities Functions

The Network Provider API specifies a single capabilities function. When the operating system requests information about a network provider's capabilities, the Multiple Provider Router (MPR) calls the NPGetCaps function of each network provider whose network is active.

The NPGetCaps function returns a bitmask indicating which functions of the Network Provider API the network provider supports. The NPGetCaps function is the only function that a network provider must implement. The operating system calls this function to determine which other functions of the Network Provider API the provider supports.