This function returns additional capabilities supported by the source control plug-in.
[in] The source control plug-in context pointer.
[in] A flag specifying an extended capability for which to test (see the Extended Capability Code table in Capability Flags for the possible flags).
[out] Returns non-zero (TRUE) if the specified capability is supported; otherwise, returns zero (FALSE).
The source control plug-in implementation of this function is expected to return one of the following values:
The get capability operation completed successfully.
Unknown or unspecified error occurred.
This method is called on demand; that is, when a capability needs to be tested, this method is called to determine if that capability is supported. Only one flag at a time is specified.