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The DhcpModifyClassV6 function modifies a DHCPv6 user or vendor class defined on the server.
Syntax
DWORD DHCP_API_FUNCTION DhcpModifyClassV6(
  [in] LPWSTR               ServerIpAddress,
  [in] DWORD                ReservedMustBeZero,
  [in] LPDHCP_CLASS_INFO_V6 ClassInfo
);
Parameters
[in] ServerIpAddress
Unicode string that specifies the IP address or hostname of the DHCP server.
[in] ReservedMustBeZero
Reserved. This value must be set to 0.
[in] ClassInfo
Pointer to a DHCP_CLASS_INFO_V6 structure that contains the new information for the class.
Return value
This function returns ERROR_SUCCESS upon a successful call. Otherwise, it returns one of the DHCP Server Management API Error Codes.
| Return code | Description | 
|---|---|
| 
 | This call was performed by a client who is not a member of the "DHCP Administrators" security group. | 
| 
 | The DHCP_CLASS_INFO structure provided in ClassInfo has null or invalid values for the ClassName or ClassData member (or both). | 
| 
 | A class name could not be found that matches the provided information. | 
| 
 | An error occurred while accessing the DHCPv6 server's database. | 
| 
 | The new class name is currently in use, or the new class information is currently in use. | 
Requirements
| Requirement | Value | 
|---|---|
| Minimum supported client | None supported | 
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] | 
| Target Platform | Windows | 
| Header | dhcpsapi.h | 
| Library | Dhcpsapi.lib | 
| DLL | Dhcpsapi.dll |