Comdll 的編寫(xiě)
inface.h
----------------------
#ifdef _INFACE_H
#else
#define _INFACE_H
#include <objbase.h>
interface IX:public IUnknown
{
virtual ULONG __stdcall fx()=0;
};
interface IY:public IUnknown
{
virtual void __stdcall fy()=0;
};
interface IZ:public IUnknown
{
virtual void __stdcall fz()=0;
};
class CA:public IX
{
virtual HRESULT __stdcall QueryInterface (const IID & riid,void **ppv);
virtual ULONG __stdcall AddRef();
virtual ULONG __stdcall Release();
virtual ULONG __stdcall fx();
public:
CA();
~CA();
private:
long m_cRef;
};
extern "C"
{
const IID IID_IX;
const IID IID_IY;
const IID IID_IZ;
}
#endif
------------------
compnt1.cpp
----------------------------------
#include "inface.h"
#include <objbase.h>
CA::CA()
{
m_cRef=0;
}
CA::~CA()
{
OutputDebugString("~ destructor \n");
}
HRESULT __stdcall CA::QueryInterface (const IID & riid,void **ppv)
{
if(riid==IID_IUnknown)
{
*ppv=static_cast<IX*>(this);
}
else if(riid==IID_IX)
{
*ppv=static_cast<IX*>(this);
}
/*
else if(riid==IID_IY)
{
*ppv = static_cast<IY*>(this);
}*/
else
{
*ppv=NULL;
return E_NOINTERFACE;
}
static_cast<IUnknown *>(*ppv)->AddRef();
return S_OK;
}
ULONG __stdcall CA::AddRef()
{
return InterlockedIncrement(&m_cRef);
}
ULONG __stdcall CA::Release()
{
return InterlockedDecrement(&m_cRef);
}
ULONG __stdcall CA::fx()
{
long a=10;
return a;
}
extern "C" IUnknown * CreateInstance()
{
IUnknown *pI = static_cast<IX*>(new CA());
pI->AddRef();
return pI;
}
-----------------------
guids.cpp
------------------------------
#include <objbase.h>
// {73373F3A-716D-488b-A821-2A0E963B6285}
extern const GUID IID_IX =
{ 0x73373f3a, 0x716d, 0x488b, { 0xa8, 0x21, 0x2a, 0xe, 0x96, 0x3b, 0x62, 0x85 } };
// {D8FED3FB-31D6-48c0-8FBA-E1B613281D36}
extern const GUID IID_IY =
{ 0xd8fed3fb, 0x31d6, 0x48c0, { 0x8f, 0xba, 0xe1, 0xb6, 0x13, 0x28, 0x1d, 0x36 } };
// {8532846B-94E5-4a10-A632-36A49C5D5D76}
extern const GUID IID_IZ =
{ 0x8532846b, 0x94e5, 0x4a10, { 0xa6, 0x32, 0x36, 0xa4, 0x9c, 0x5d, 0x5d, 0x76 } };
----------------
comdll.def //模塊定義軟件
--------------------------------------------------
LIBRARY "Comdll"
EXPORTS
CreateInstance @1
--------------------------------------------------------
在 MFC 的中 結(jié)合
#include "inface.h"
#include "WinDef.h"
IUnknown * CallCreateInstance(char * name)
{
typedef IUnknown * (* fun)();
fun func=NULL;
HMODULE hMoudle;
hMoudle=::LoadLibrary(name); //"Comdll.dll"
if(hMoudle)
{
func=(fun)::GetProcAddress(hMoudle,"CreateInstance");
if(func)
{
return func();
}
else
{
AfxMessageBox("func = NULL");
}
}
else
{
AfxMessageBox("DLL faild");
}
return NULL;
}
void CCOMDlltest1Dlg::OnBnClickedOk()
{
// TODO: 在此添加控件通知處理程序代碼
//OnOK();
char buf[30];
sprintf(buf,"%s","Comdll.dll");
IUnknown *pi=CallCreateInstance(buf);
IX * ix;
pi->QueryInterface(IID_IX,(void **)&ix);
CString str;
str.Format("%ld",ix->fx());
MessageBox(str);
//typedef
}
