@param[in, out] VariableNameSize Size of the variable\r
@param[in, out] VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r
On output, returns the Null-terminated Unicode string of the current variable.\r
@param[in, out] VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r
@param[in, out] VariableNameSize Size of the variable\r
@param[in, out] VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r
On output, returns the Null-terminated Unicode string of the current variable.\r
@param[in, out] VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r