The DHCP_IP_RANGE structure defines the IPv4 range for an IPv4 scope. This is used in structure DHCP_SUBNET_ELEMENT_DATA (section 2.2.1.2.33).

 typedef struct _DHCP_IP_RANGE {
   DHCP_IP_ADDRESS StartAddress;
   DHCP_IP_ADDRESS EndAddress;
 } DHCP_IP_RANGE,
  *LPDHCP_IP_RANGE;

StartAddress: This is of type DHCP_IP_ADDRESS (section 2.2.1.2.1), containing the first IPv4 address in the IPv4 range.

EndAddress: This is of type DHCP_IP_ADDRESS, containing the last IPv4 address in the IPv4 range.