when do we need to define INC_OLE2?

Hello everyone,


When do we need to add code,

#define INC_OLE2

in our code? I can not find related information from MSDN.


thanks in advance,
George

When and where does the compiler ask for it?

From my meager diggings...

You can manually include <ole2.h> in your application, or you can #define INC_OLE2 and then include <windows.h> and it (<ole2.h>) will be included for you. It simply seems to define whether or not including <windows.h> will also include <ole2.h>. If you don't define it before including <windows.h>, then it may or may not be loaded depending on other #define's that may be set.

I could be mistaken.

Thanks Yarin,

Originally Posted by Yarin

When and where does the compiler ask for it?

Compiler is not asking for this. I am interested to learn. I read some other's code and sometimes they use #define INC_OLE2 and I want to know when do we need it and what is the function of INC_OLE2. Any ideas?


regards,
George

Thanks hk_mp5kpdw,

Originally Posted by hk_mp5kpdw

From my meager diggings...

You can manually include <ole2.h> in your application, or you can #define INC_OLE2 and then include <windows.h> and it (<ole2.h>) will be included for you. It simply seems to define whether or not including <windows.h> will also include <ole2.h>. If you don't define it before including <windows.h>, then it may or may not be loaded depending on other #define's that may be set.

I could be mistaken.

Your reply is very helpful. I think you mean if we want to include ole2.h, we should either include it directly or using,

1. #define INC_OLE2;
2. #include <windows.h>

Right?

What do you mean "If you don't define it before including <windows.h>, then it may or may not be loaded depending on other #define's that may be set."? I am confused about this sentence.


regards,
George