function IC_reg(aserver_host: Pchar;
                           aserver_port: Pchar;
                           arm:char;
                           user_name,password: Pchar;
                           var answer: Pchar; abufsize: integer):integer; stdcall;

 procedure TForm1.RegBitBtnClick(Sender: TObject);
var rp: Pchar;
    ri: integer;
begin
GetMem(rp,32000);
ri:=IC_reg('127.0.0.1','6666',IRBIS_ADMINISTRATOR,'1','1',rp,32000);
Caption:=IntToStr(ri);
Memo1.Lines.Text:=String(rp);
FreeMem(rp);
end;

 from ctypes import *
_dll = windll.irbis64_client
IC_reg = _dll.IC_reg
ServerIP = "127.0.0.1"
ServerPort = "6666"
ARM = "A"
Login = "1"
Password = "1"
sBuffer = c_wchar_p(" " * 32000)
Size = 32000
IC_reg.restypes = [c_wchar_p, c_wchar_p, c_wchar, c_wchar_p, c_wchar_p, c_wchar_p, c_int]
IC_reg.argtypes = [c_wchar_p, c_wchar_p, c_wchar, c_wchar_p, c_wchar_p, POINTER(c_wchar_p), c_int]
ans = IC_reg(ServerIP, ServerPort, ARM, Login, Password, byref(sBuffer), Size)

 IRBIS_ADMINISTRATOR = 'A';