C / C++ / MFC

22-Jun-06 21:02

Hi to all,
I am using 'Windows Media Player' in VC++6 from 'Registered ActiveX Controls'. The code is working fine on my PC (Xp Professional). But when I run the exe on other PC, it is creating a problem.

On other Xp Professional, it shows an error message as "unhandle win32 exception occur in exe" & ask for debug.
While on Windows Server the exe is not ruuning.

What should i do? Plz. help me.

Best Regards & Thanks,
Aniket Salunkhe

David Crow23-Jun-06 3:21

23-Jun-06 3:21

Aniket Salunkhe wrote:
...it is creating a problem...What should i do?

Has the ActiveX control been registered on the other machine(s)?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Andy Rama23-Jun-06 23:22

23-Jun-06 23:22

If not, then how to register it. (If possible explain in detail.)

David Crow26-Jun-06 3:22

26-Jun-06 3:22

regsvr32.exe comes to mind. Smile | :)

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Andy Rama26-Jun-06 19:42

26-Jun-06 19:42

But where is the ActiveX Control located? I did not obtained the location of ActiveX Control. Actually location "C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Gallery\Registered ActiveX Controls" is empty. What should i do?

David Crow27-Jun-06 3:17

27-Jun-06 3:17

Aniket Salunkhe wrote:
But where is the ActiveX Control located?

Have you looked for wmp.dll?

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Andy Rama3-Jul-06 1:47

3-Jul-06 1:47

Hi,

Thanks for ur all previous useful suggestions.
But how to know ... which dll should be used for any ActiveX Control?
( e.g. which dll should be used for MS Flex Grid Control? )

Thanks & Best Regards,
Aniket Salunkhe

David Crow5-Jul-06 2:57

5-Jul-06 2:57

Aniket Salunkhe wrote:
( e.g. which dll should be used for MS Flex Grid Control? )

That would be in msflxgrd.ocx.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Andy Rama5-Jul-06 19:35

5-Jul-06 19:35

Thanks.
But my que. was "How I can know which is the supporting file(s) for any (other) ActiveX Control?"

From where you come to know that,
msflxgrd.ocx : for MS Flex Grid AND
wmp.dll : for Windows MEdia Player

Best Regards,
Aniket

David Crow6-Jul-06 2:43

Beginner:"Why use Preprocessor directives?"

6-Jul-06 2:43

One clue is the filename. The other is to right-click the file and select Properties from the context menu.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

AbhishekBK22-Jun-06 19:51

AbhishekBK

22-Jun-06 19:51

Ok, guys. This might seem too much of a theoritical question for a forum. But the problem is, I havent read anywhere a convincing account for the having preprocessor derictives like:

<br />
#ifndef SOMETHING_H<br />
#define SOMETHING_H<br />
<br />
// definition of something.h<br />
<br />
#endif<br />

They say it is for conditional compiling! But what does that mean? What exactly do statements like #ifndef instruct the compiler to do?

Abhishek

_AnsHUMAN_ 22-Jun-06 20:19

_AnsHUMAN_

22-Jun-06 20:19

(From the docs)
The #ifndef directive checks for the opposite of the condition checked by #ifdef. If the identifier has not been defined (or its definition has been removed with #undef), the condition is true (nonzero). Otherwise, the condition is false (0).

This is useful for checking whether a definition exists, because a definition can be passed from the command line.
Literally means. If not defined , Define it now.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Stephen Hewitt22-Jun-06 20:40

Stephen Hewitt

22-Jun-06 20:40

These look like reinclusion guards. It stops the same .H file from being processed multiple times in the same compilation unit as this can cause problems. i.e.
------------------------------------
// File "a.h"
//

class CMyClass
{
public:
CMyClass() {}
};

// File "b.h"
//

#include "a.h"

// File "Main.cpp"
//

#include "a.h"
#include "b.h"

------------------------------------
This will casue problems as the class "CMyClass" is defined twice in the compilation unit "Main.cpp": once via "a.h" and once via "b.h" which includes "a.h". Reinclusion guards stop this kind of thing.

Steve

Re: Beginner:&amp;quot;Why use Preprocessor directives?&amp;quot; [modified]

AbhishekBK22-Jun-06 20:50

AbhishekBK

22-Jun-06 20:50

Ok. In that case when we use

#ifndef SOMEFILE_H<br />
#define SOMEFILE_H<br />
<br />
//Definition of somefile.h<br />
<br />
#endif

what is SOMEFILE_H ? is it another SIGNATURE to indicated something exists or not? Is it visible to the compiler or only to the preprocessor?

Abhishek

Stephen Hewitt22-Jun-06 20:52

Stephen Hewitt

22-Jun-06 20:52

It's just something you make up that is unique for each header file in your project. You could also use the symbol to detect if a header has been included or not.

Steve

David Crow23-Jun-06 3:23

23-Jun-06 3:23

AbhishekBK wrote:
what is SOMEFILE_H ?

It's simply a word that you make up. You could do the same with:

#ifndef AbhishekBK
#define AbhishekBK 
...
#endif

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb