<div class="content"><p> </p><p>This structure defines IPv4 subnets. It is used in policy
rules.</p><dl>
<dd>
<div><pre> typedef struct _tag_FW_IPV4_SUBNET {
   unsigned long dwAddress;
   unsigned long dwSubNetMask;
 } FW_IPV4_SUBNET,
  *PFW_IPV4_SUBNET;
</pre></div>
</dd></dl><p><b>dwAddress:</b>   This field represents
the IPv4 address.</p><p><b>dwSubNetMask:</b>  This field contains
the subnet mask in host network order. If it contains ones, they MUST be
contiguous and shifted to the most significant bits.</p><dl>
<dd>
<p>A <b>dwSubNetMask</b> of 0x00000000 is invalid. A
subnet mask of 0xFFFFFFFF means that the subnet mask represents a single
address. </p>
</dd></dl></div>