In Window forms application C++ - C / C++ / MFC Discussion Boards

Re: threading differences VC6 v VS2005

Randor 1-Jun-09 7:14

Randor

1-Jun-09 7:14

I have seen performance increase as much as 25% in certain functions when porting old code up to VS2005. In the days of VC6 I could use __asm and optimize algorithms better than the compiler. I have a hard time beating VC2005/VC2008 compiler optimizations now. I pretty much gave up on trying to beat the latest compilers.

You could use the /FAs compiler switch[^] and compare the assembly generated by each compiler to see the difference.

Best Wishes,
-David Delaune

Re: threading differences VC6 v VS2005

ZelionThunder2-Jun-09 17:43

ZelionThunder

2-Jun-09 17:43

Yeah I'd say its hard to beat the machine in this case.

Re: threading differences VC6 v VS2005

Luc Pattyn1-Jun-09 6:03

Luc Pattyn

1-Jun-09 6:03

Hi Chris,

FWIW: there was a time VS was terribly slow at dealing with the first exception in an app. Not sure which versions and languages, but it was not very constant and in the order of seconds. Maybe that is what you're having?

Smile | :)

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Re: threading differences VC6 v VS2005

C^hris L^osinger1-Jun-09 6:16

C^hris L^osinger

1-Jun-09 6:16

hmm...

i don't recall seeing any exceptions in the output window, but i'll check again.

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Re: threading differences VC6 v VS2005

Joe Woodbury1-Jun-09 7:50

Joe Woodbury

1-Jun-09 7:50

The heap manager for VS2005 is faster than that for Visual 6. I ran across this a few weeks ago.

How thread local storage is handled is different fore VS2005 as well, though I doubt this would affect performance in a significant way.

You also need to verify you really are testing what you think you're testing. How fast is the second thread even executing? Due to small changes in the CRT, the new thread may not be getting a quanta as quickly under 6.

Another possibility is that some paging is happening under 6 that isn't happening under 05 (seen that also.)

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- P.J. O'Rourke

Re: threading differences VC6 v VS2005

C^hris L^osinger1-Jun-09 7:53

C^hris L^osinger

1-Jun-09 7:53

Joe Woodbury wrote:
How fast is the second thread even executing?

that's an interesting question. i never thought to time each thread independently.

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Gadjet integration with IE toolbar?

ritz12341-Jun-09 4:16

ritz1234

1-Jun-09 4:16

Hello Friends,

I am creating a IE toolbar. I want to develop feature like "Google Toolbar" which allow us to add google's Gadgets in the toolbar. How does a toolbar notified by the webpage that user has selected(by clicking on the "Add" button on webpage) a perticular gadget?
Please suggest the way in which this can be achieved.

ritz1234

In Window forms application C++

wael_r1-Jun-09 3:33

wael_r

1-Jun-09 3:33

Please Help!
I want to pass variables from form1 to form2,
I want to pass structure (struct fff) from form1 to form2.

Re: In Window forms application C++

David Crow1-Jun-09 3:45

David Crow

1-Jun-09 3:45

Ok, go ahead. Confused | :confused:

Reading here wouldn't hurt either.

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Re: In Window forms application C++

fanronghua1-Jun-09 19:25

fanronghua

1-Jun-09 19:25

SendMessage();

Typing in Unicode language

Benjamin Bruno1-Jun-09 3:32

Benjamin Bruno

1-Jun-09 3:32

Hi
I created an application in which ,there is a RichEdit control.But i am not getting
proper strings for unicode letters which I typed in.(eg: when I type a character it shows
"?").How to solve this.

thanks

SNMP development

Jim Crafton1-Jun-09 3:25

Jim Crafton

1-Jun-09 3:25

We have a project at work that needs to support outputting various bits of data via SNMP. I've been playing with the WinSNMP APIs a bit, and I'm stuck on one concept. If you want to report these bits of data, through a custom MIB/OIDs do you have to use the extension DLL approach? In other words, the logic for where the data is located/generated is in another running app. Is it possible for that app to register itself somehow so that SNMP GET messages for our custom OID that come into the machine can get handled by that app? Or is the only way to accomplish this to use the extension DLL?

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Re: SNMP development

Joe Woodbury1-Jun-09 8:19

Joe Woodbury

1-Jun-09 8:19

It's been ages since I did SNMP development, but looking at some old code, my vague memory is that you have to use extension agent DLLs. I did note I was using a shared queue to communicate with other programs, which reinforces this view.

After posting this, I recalled putting a data area inside the extension agent and updating it through the message queue so the agent could respond very quickly with responses and work regardless of whether the other programs were running. I do recall that one reason for this is the requirement by Microsoft's SNMP stack (at least in NT 4.0) required that you respond to a GET in a certain time window and really bad things happened if you didn't (I do have a vague memory that the "really bad things" issue was fixed in W2K, but hey, it's been seven years.)

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: SNMP development

Jim Crafton1-Jun-09 8:26

Jim Crafton

1-Jun-09 8:26

OK, thanks, I did just find this:
How to develop a SNMP extension agent DLL[^]

which confirms what I was afraid of, that you have to be an extension DLL. Not the end of the world, just requires a bit more set up.

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SELECT * FROM User WHERE Clue > 0
0 rows returned
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CRichEditCtrl on CMDIChildWnd and to capture mouse control

prithaa1-Jun-09 2:48

prithaa

1-Jun-09 2:48

Hello,

I have a CRichEditCtrl on CMDIChildWnd which is created on the window properly but it(CRichEditCtrl) cannot capture mouse control when the mouse is on the window(CRichEditCtrl).What must be the problem?

Prithaa

Re: CRichEditCtrl on CMDIChildWnd and to capture mouse control

prithaa2-Jun-09 23:41

prithaa

2-Jun-09 23:41

Hello,

This is continuation of the problem. The keyboard cursor is seen on the CRichEditCtrl but the mouse cursor is not seen.

Prithaa

Simple Mapi Vs Extended Mapi

Anil Kumar.Arvapalli1-Jun-09 2:44

Anil Kumar.Arvapalli

1-Jun-09 2:44

what is the difference between Simple Mapi and Extended Mapi

Re: Simple Mapi Vs Extended Mapi

CPallini1-Jun-09 2:46

CPallini

1-Jun-09 2:46

Let me...[^]. Roll eyes | :rolleyes:

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Re: Simple Mapi Vs Extended Mapi

Stuart Dootson1-Jun-09 2:48

Stuart Dootson

1-Jun-09 2:48

The answer's contained in here[^], which is easily accessible through the programmer's best friend[^].

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Windows Forms Application C++ .net 2003

wael_r1-Jun-09 1:47

wael_r

1-Jun-09 1:47

Pleaseeeeeeeeee can any one help me to declare public struct or variable to use in all the forms in
"Windows Forms Application C++"
ex: i want to declare a connection and use it in all the forms.
i want to declare a structure and use it in all the forms.

Re: Windows Forms Application C++ .net 2003

56789012341-Jun-09 2:48

5678901234

1-Jun-09 2:48

Declare it as static class member in one of the classes.

Re: Windows Forms Application C++ .net 2003

Stuart Dootson1-Jun-09 2:51

Stuart Dootson

1-Jun-09 2:51

In a .h file (let's call it my_global_struct.h):

#if !defined(__my_global_struct_h__)
#define __my_global_struct_h__

struct my_global_struct
{
   // put whatever you want in the struct here
};

extern my_global_struct;

#endif // !defined(__my_global_struct_h__)

In a .cpp file (let's call it my_global_struct.cpp):

#include my_global_struct.h
my_global_struct;

#include my_global_struct.h into any files that need to see the global struct variable.

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Re: Windows Forms Application C++ .net 2003

wael_r1-Jun-09 3:28

wael_r

1-Jun-09 3:28

Thank you very much for your reply
but i need to user the same structure with the filled values in other form.

Re: Windows Forms Application C++ .net 2003

Stuart Dootson1-Jun-09 3:30

Stuart Dootson

1-Jun-09 3:30

And there's nothing in my answer preventing you from doing so

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Re: Windows Forms Application C++ .net 2003

wael_r1-Jun-09 19:52

wael_r

1-Jun-09 19:52

Thanks again, I tried your solution but may i need another thing.
Ex: struct ggg{
int i;
int j;
}test;

in the first form1 i put "test fff;"
fff.i=1;

in the second form i want to use the value of the same structure fff.
Ex: i want in the form2 to give the value of fff.i to another variable in form2;
any solution? really i spend one day on this. Sigh | :sigh:

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