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DhcpV4SetPolicy function (dhcpsapi.h)

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The DhcpV4SetPolicy function updates one or more parameters of an existing policy.

Syntax

DWORD DHCP_API_FUNCTION DhcpV4SetPolicy(
  [in, optional] LPWSTR          ServerIpAddress,
  [in]           DWORD           FieldsModified,
  [in]           BOOL            fGlobalPolicy,
  [in]           DHCP_IP_ADDRESS SubnetAddress,
  [in]           LPWSTR          PolicyName,
  [in]           LPDHCP_POLICY   Policy
);

Parameters

[in, optional] ServerIpAddress

Pointer to a null-terminated Unicode string that represents the IP address or hostname of the DHCP server.

[in] FieldsModified

A value from the DHCP_POLICY_FIELDS_TO_UPDATE enumeration that defines the DHCPv4 policy fields to modify.

[in] fGlobalPolicy

If TRUE the server level policy is set. Otherwise, the scope level policy is set.

[in] SubnetAddress

DHCP_IP_ADDRESS structure that contains the IPv4 subnet address of the policy to modify.

[in] PolicyName

A null-terminated Unicode string that represents the name of the policy to modify.

[in] Policy

Pointer to a DHCP_POLICY structure that contains the parameters of the policy to modify.

Return value

If the function succeeds, it returns ERROR_SUCCESS.

If the function fails, it returns one of the following or an error code from DHCP Server Management API Error Codes.

Value Meaning
ERROR_INVALID_PARAMETER
 One or more of the parameters were invalid.
ERROR_DHCP_SUBNET_NOT_PRESENT
 The specified IPv4 subnet does not exist.
ERROR_DHCP_RANGE_INVALID_IN_SERVER_POLICY
 A policy range has been specified for a server level policy.
ERROR_DHCP_INVALID_POLICY_EXPRESSION
 The specified conditions or expressions of the policy are invalid.
ERROR_DHCP_POLICY_RANGE_BAD
 The specified policy range is not contained within the IP address range of the scope or the specified policy range is invalid.
ERROR_DHCP_POLICY_RANGE_EXISTS
 The specified policy range overlaps with the policy ranges of an existing policy at the specified scope.
ERROR_DHCP_INVALID_PROCESSING_ORDER
 The specified processing order is greater than the maximum processing order of the existing policies at the specified level (server or scope).
ERROR_DHCP_CLASS_NOT_FOUND
 The vendor class or user class reference in the conditions of the policy does not exist.

Requirements

Requirement Value
Minimum supported client None supported
Minimum supported server Windows Server 2012 [desktop apps only]
Target Platform Windows
Header dhcpsapi.h
Library Dhcpsapi.lib
DLL Dhcpsapi.dll

See also

DhcpV4AddPolicyRange

DhcpV4CreatePolicy

DhcpV4DeletePolicy

DhcpV4EnumPolicies

DhcpV4GetPolicy

DhcpV4QueryPolicyEnforcement

DhcpV4RemovePolicyRange

DhcpV4SetPolicyEnforcement