形式
ipwild		ip-address/wild-card-mask	ex. 192.168.1.0/0.0.0.255
wild		wild-card-mask				ex. 0.0.0.255
maskl		subnet prefix length		ex. 24

ipinnet(ip As String, net As String) As Boolean
	ipアドレスが、ネットワークアドレス(ip/wild形式)に含まれるか否か

ipwild2broadaddr(ipwild As String) As String
	ip/wildのブロードキャストアドレスを返却
	ホストアドレス部はビットオン（１）

ipwild2nwaddress(ipwild As String) As String
	ip/wildのＮＷアドレスを返却
	ホストアドレス部はビットオフ（ゼロ）

wild2subnetmask(sWild As String) As String
	wild-card-maskのprefix-lengthを返却

ipwild2ipmaskl(sNetwork As String) As String
	ip/wildをip/prefixに変換

ipmaskl2ipwild(sNetwork As String) As String
	ip/prefixをip/wildに変換

Ip2Int(sIp As String) As Variant
	ipアドレスを４バイト整数に変換

wild2maskl(sWild As String) As Integer
	wild-card-maskをprefix-lengthに変換

maskl2wild(sMaskl As Variant) As String
	prefix-lengthをwild-card-maskに変換

maskl2wildoct(iMaskl As Variant) As String
	１バイト分のマスク長（０－８）を０－２５５に変換