关于Delphi调用C语言的Dll的问题

[fantast79]

现在手里边有一个Dll是C语言的，它提供的调用方法是：
extern ZDIGEST_API void ZSignature(unsigned char *data, long len, unsigned char *digest);
extern ZDIGEST_API bool ZSignatureVerify(unsigned char *data, long len, unsigned char *digest);
extern ZDIGEST_API bool ZSignatureFile(char *fpath, unsigned char *digest);

这是三个函数，请教高手我在Delphi中如何使用?

[beyondtkl]

extern ZDIGEST_API void ZSignature(unsigned char *data, long len, unsigned char *digest);


ZDIGEST_API 可能是 __stdcall / __cdecl吧

procedure ZSignature( data: PByte; len: int64; digest: PByte); stdcall; // or cdecl;

[clasj]

program Project1;

{$APPTYPE CONSOLE}

uses
SysUtils;

procedure Func1(data: pbyte; len: integer; digest: pbyte); cdecl; external 'dllname.dll' name '?ZSignature@@YAXPAEJ0@Z';
function Func2(data: pbyte; len: integer; digest: pbyte):boolean; cdecl; external 'dllname.dll' name '?ZSignatureFile@@YA_NPADPAE@Z';
function Func3(fpath: pchar; digest: pbyte): boolean; cdecl; external 'dllname.dll' name '?ZSignatureVerify@@YA_NPAEJ0@Z';

begin
Func1(nil, 0, nil);
Func2(nil, 0, nil);
Func3(nil, nil);
end.

[clasj]

你可以先用我给你的代码测试一下！