delphi判断IE是否使用代理

uses WinInet



function GetProxyInformation: string;
var
ProxyInfo: PInternetProxyInfo;
Len: LongWord;
begin
Result := '';
Len := 4096;
GetMem(ProxyInfo, Len);
try
if InternetQueryOption(nil, INTERNET_OPTION_PROXY, ProxyInfo, Len) then
if ProxyInfo^.dwAccessType = INTERNET_OPEN_TYPE_PROXY then
begin
Result := ProxyInfo^.lpszProxy
end;
finally
FreeMem(ProxyInfo);
end;
end;



procedure GetProxyServer(protocol: string; var ProxyServer: string;var ProxyPort: Integer);
var
i: Integer;
proxyinfo,ps:string;
begin
ProxyServer := '';
ProxyPort := 0;
proxyinfo := GetProxyInformation;
if proxyinfo = '' then
Exit;
protocol := protocol + '=';
i := Pos(protocol, proxyinfo);
if i > 0 then
begin
Delete(proxyinfo, 1, i + Length(protocol));
i := Pos(';', ProxyServer);
if i > 0 then
proxyinfo := Copy(proxyinfo, 1, i - 1);
end;
i := Pos(':', proxyinfo);
if i > 0 then
begin
ProxyPort:=StrToIntDef(Copy(proxyinfo, i + 1, Length(proxyinfo) - i), 0);
ProxyServer:=Copy(proxyinfo, 1, i - 1)
end;
end;



procedure TForm1.Button1Click(Sender: TObject);
var
ProxyServer: string;
ProxyPort: Integer;
begin
GetProxyServer('http', ProxyServer, ProxyPort);
if ProxyPort=0 then
begin
ShowMessage('你的IE没有使用的代理服务器');
Edit1.Text:='';
Edit2.Text:='';
end
else
begin
Edit1.Text:= ProxyServer; //代理服务器地址
Edit2.Text :=IntToStr(ProxyPort); //代理端口
end;
end;





设置IE 代理

user Registry



procedure SetIEProxyServer(ProxyIP:string;ProxyPort:string);
var
zc:TRegistry;
begin
zc:=TRegistry.Create;
zc.RootKey:=HKEY_CURRENT_USER;
zc.OpenKey('Software\Microsoft\Windows\CurrentVersion\Internet Settings',True);
zc.WriteInteger('ProxyEnable',1);
if (ProxyIP='') or (ProxyPort='') then
begin
Application.MessageBox('请输入IP地址和端口','Error',MB_ICONHAND);
Exit;
end;
zc.WriteString('ProxyServer',ProxyIP+':'+ProxyPort);
if zc.OpenKey('Software\Microsoft\Windows\CurrentVersion\Internet Settings',True) then
begin
Form1.Label3.Font.Color:=clRed;
Form1.Caption:=ProxyIP+'代理成功';
end
else
begin
Form1.Label3.Caption:=ProxyIP+'代理失败';
end;
zc.Free;
end;


procedure DeleteIEProxyServer();
var
zc:TRegistry;
begin
zc:=TRegistry.Create;
zc.RootKey:=HKEY_CURRENT_USER;
zc.OpenKey('Software\Microsoft\Windows\CurrentVersion\Internet Settings',True);
if zc.DeleteValue('ProxyEnable')=True then
begin
ShowMessage('取消IE代理成功');
end
else
ShowMessage('当前IE没有代理');
zc.Free;
end;



procedure TForm1.Button3Click(Sender: TObject);

begin
DeleteIEProxyServer();
end;


procedure TForm1.Button1Click(Sender: TObject);
begin
SetIEProxyServer(Edit1.text,Edit2.Text);
end;