L
lpzst002
Unregistered / Unconfirmed
GUEST, unregistred user!
function HostToIP(Name: string; var Ip: string): Boolean;
var
wsdata : TWSAData;
hostName : array [0..255] of char;
hostEnt : PHostEnt;
addr : PChar;
begin
WSAStartup ($0101, wsdata);
try
gethostname (hostName, sizeof (hostName));
StrPCopy(hostName, Name);
hostEnt := gethostbyname (hostName);
if Assigned (hostEnt) then
if Assigned (hostEnt^.h_addr_list) then begin
addr := hostEnt^.h_addr_list^;
if Assigned (addr) then begin
IP := Format ('%d.%d.%d.%d', [byte (addr [0]),
byte (addr [1]), byte (addr [2]), byte (addr [3])]);
Result := True;
end
else
Result := False;
end
else
Result := False
else begin
Result := False;
end;
finally
WSACleanup;
end
end;
TWSAData;//这是什么对象?有什么作用?
WSAStartup ($0101, wsdata);//这是个什么函数?什么作用?
PHostEnt//这是个什么变量?什么作用?
Assigned//这是个什么函数,好像在很多地方见过
WSACleanup;//);//这是个什么函数?什么作用?
var
wsdata : TWSAData;
hostName : array [0..255] of char;
hostEnt : PHostEnt;
addr : PChar;
begin
WSAStartup ($0101, wsdata);
try
gethostname (hostName, sizeof (hostName));
StrPCopy(hostName, Name);
hostEnt := gethostbyname (hostName);
if Assigned (hostEnt) then
if Assigned (hostEnt^.h_addr_list) then begin
addr := hostEnt^.h_addr_list^;
if Assigned (addr) then begin
IP := Format ('%d.%d.%d.%d', [byte (addr [0]),
byte (addr [1]), byte (addr [2]), byte (addr [3])]);
Result := True;
end
else
Result := False;
end
else
Result := False
else begin
Result := False;
end;
finally
WSACleanup;
end
end;
TWSAData;//这是什么对象?有什么作用?
WSAStartup ($0101, wsdata);//这是个什么函数?什么作用?
PHostEnt//这是个什么变量?什么作用?
Assigned//这是个什么函数,好像在很多地方见过
WSACleanup;//);//这是个什么函数?什么作用?