Hi Folks,
I have written a code ... which is some simulation for COM (not a
complete COM , just Query Interface .. that tooo only 1 method I kept) . But my
app is crashing whenever I am trying to access that medthod. I copy pasted the
code . Please look into it . I marked those lines in red which are making app
to crash.
#include<stdio.h>
#include<conio.h>
#include<windows.h>
struct IUnkn
{
virtual HRESULT QI(int IId,IUnkn **ptr) = 0;
virtual void display()=0;
};
class MyOuterClass
{
public:
int refCount;
class MyInnerClass:public IUnkn
{
public:
virtual HRESULT QI(int IId,IUnkn **ptr)
{
if(IId == 1)
{
IUnkn *pThis = (IUnkn *)((BYTE *)this+(int )(&(((class MyOuterClass
*)0)->m_InnerObj)));
*ptr = pThis;
return 1;
}
*ptr = NULL;
return 0;
}
virtual void display()
{
printf("\n I am in show method");
}
}m_InnerObj;
friend class MyInnerClass;
};
void CreateObject(int IId,IUnkn **ptr)
{
MyOuterClass obj;
obj.m_InnerObj.QI(IId,ptr);
(*ptr)->display();
}
void main()
{
IUnkn *x;
CreateObject(1,&x);
x->display();
}
Thx,
--Gopi
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