dll pansichar 报错

library dll10;

 

{ Important note about DLL memory management: ShareMem must be the

first unit in your library's USES clause AND your project's (select

Project-View Source) USES clause if your DLL exports any procedures or

functions that pass strings as parameters or function results. This

applies to all strings passed to and from your DLL--even those that

are nested in records and classes. ShareMem is the interface unit to

the BORLNDMM.DLL shared memory manager, which must be deployed along

with your DLL. To avoid using BORLNDMM.DLL, pass string information

using PChar or ShortString parameters. }

 

uses

System.ShareMem,

System.SysUtils,

System.Classes,

Soap.InvokeRegistry,

Soap.SOAPHTTPClient,

System.Types,

Soap.XSBuiltIns,

n_socialwebservice in 'n_socialwebservice.pas';

 

{$R *.res}

function dllstr(const input: PAnsiChar; var output: PAnsiChar): Integer; stdcall;

begin

StrCopy(output, input);

Result := 1;

end;

 

function getexamine(const as_type: PAnsiChar; const as_code: PAnsiChar; var as_sresult: PAnsiChar; var as_smessage: PAnsiChar): SmallInt; stdcall;

var

ahttp: THTTPRIO;

s3, s4: string;

s5, s6: PAnsiChar;

begin

try

ahttp := THTTPRIO.Create(nil);

ahttp.URL := 'http://218.7.121.38:11111/socialwebservice/n_socialwebservice.asmx';

ahttp.Service := 'n_socialwebservice';

ahttp.Port := 'n_socialwebserviceSoap';

s3 := '';

s4 := '';

Result := (ahttp as n_socialwebserviceSoap).of_getexamine(StrPas(as_type), StrPas(as_code), s3, s4);

// s5 := PAnsiChar(AnsiString(s3));

// s6 := PAnsiChar(AnsiString(s4));

//重要

StrCopy(as_sresult, PAnsiChar(AnsiString(s3)));

StrCopy(as_smessage, PAnsiChar(AnsiString(s4)));

Result := 1;

finally

// FreeAndNil(ahttp);

end;

end;

 

exports

dllstr,

getexamine;

 

begin

 

end.

 

 

initialization

Coinitialize(nil);

finalization

CoUninitialize;

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主调用

-----------------------------------------------------------------------------------

 

procedure TForm1.btn2Click(Sender: TObject);

var

s, s1: PAnsiChar;

begin

try

//重要

GetMem(s, 1024);

GetMem(s1, 255);

getexamine(PAnsiChar(edt1.Text), PAnsiChar(''), s, s1);

//重要

mmo1.Text := s;

edt2.Text := s;

 

finally

FreeMem(s);

FreeMem(s1);

end;

end;