C / C++ / MFC

Madhu Nair10-May-09 22:28

Madhu Nair

10-May-09 22:28

Which is your default web browser ? Is that IE ?

What is the time delay caused normally when you open a new web browser window , is that 20 seconds average ?

If both the answers are YES; there is no problem with ShellExecute.

Other wise, this should be because the ShellExecute broadcasts a message to already running windows to get an instance of the web browser (or Looking in ROT table[^] for an active object) and waiting for that application instance to respond to the new request. Any way I have now valid links to prove this hypothesis.

ilgale10-May-09 23:34

ilgale

10-May-09 23:34

The problem happens with both FireFox and IE and 20 seconds is not the default startup time for the browser.
Is it possible to avoid looking in ROT or to avoid broadcasting messages ?
My goal is to open IE with a specific document... maybe it can be done with something easyest than ShellExecute with "open" parameter.

Cedric Moonen10-May-09 23:42

Cedric Moonen

10-May-09 23:42

ilgale wrote:
My goal is to open IE with a specific document...

Is this a big document ? If yes, that's probably the reason why you encounter this delay. Try to open the document manually and see how long it takes to open it.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

ilgale10-May-09 23:51

ilgale

10-May-09 23:51

The document is very easy.. and if I manually open it... it takes 0 seconds to be opened.

Now we have found a relation with a functionality of a Data Acquisition board made by
National Instruments.
If the thread that perform ShellExecute call has created a counter task for the data acquisition board the WebBroswer takes long time to be opened. If we don't create the
task, the WebBrowser is opened immediately.
We could suppose that National Instruments drives "do" something, maybe in ROT, that create
some problems...

Michel Gerritse11-May-09 2:07

Michel Gerritse

11-May-09 2:07

Have you tried this:

ShellExecute(NULL, "open", fully_qualified_path_to_folder, NULL, NULL, SW_SHOW);

This has always worked fine for me in the past.

what's the purpose of this reg file?

CPallini10-May-09 22:31

CPallini

10-May-09 22:31

It is the browser start-up time, I suppose.
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

shanzy10-May-09 21:29

10-May-09 21:29

Hello,there guru
I found a reg file on the website,but I don't know what's its mean?
Can you explain me some detail,thank you very much.

//show.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30501"
"Type"="radio"
"CheckedValue"=dword:00000002
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51104"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30500"
"Type"="radio"
"CheckedValue"=dword:00000001
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51105"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden]
"Type"="checkbox"
"Text"="@shell32.dll,-30508"
"WarningIfNotDefault"="@shell32.dll,-28964"
"HKeyRoot"=dword:80000001
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"ValueName"="ShowSuperHidden"
"CheckedValue"=dword:00000000
"UncheckedValue"=dword:00000001
"DefaultValue"=dword:00000000
"HelpID"="shell.hlp#51103"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden\Policy]

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\SuperHidden\Policy\DontShowSuperHidden]
@=""

//hide.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden]
"Text"="@shell32.dll,-30499"
"Type"="group"
"Bitmap"=hex(2):25,00,53,00,79,00,73,00,74,00,65,00,6d,00,52,00,6f,00,6f,00,74,\
00,25,00,5c,00,73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,53,00,\
48,00,45,00,4c,00,4c,00,33,00,32,00,2e,00,64,00,6c,00,6c,00,2c,00,34,00,00,\
00
"HelpID"="shell.hlp#51131"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\NOHIDDEN]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30501"
"Type"="radio"
"CheckedValue"=dword:00000002
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51104"

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\Folder\Hidden\SHOWALL]
"RegPath"="Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Advanced"
"Text"="@shell32.dll,-30500"
"Type"="radio"
"CheckedValue"=hex(4):30,30,30,30,30,30,30,30,00
"ValueName"="Hidden"
"DefaultValue"=dword:00000002
"HKeyRoot"=dword:80000001
"HelpID"="shell.hlp#51105"

多线程脑袋

CPallini10-May-09 21:36

CPallini

10-May-09 21:36

Nobody knows. Moreover googling for it will give you merely 24,600,000 results [^]
Smile | :)

shanzy10-May-09 21:47

10-May-09 21:47

Can you explain me the key and the value below:

"Text"="@shell32.dll,-30501"

How to View shell32.dll content(the negative number after it)
I use the resouce hacker view but the value is not the negative number

多线程脑袋

shanzy10-May-09 21:50

10-May-09 21:50

Is there any rule about shell32.dll and the negative number after it which Microsoft provide for us???

多线程脑袋

shanzy10-May-09 21:57

10-May-09 21:57

thank you for your replay,I get it.

多线程脑袋

How to get Error message string ?

Hamid_RT10-May-09 23:07

Hamid_RT

10-May-09 23:07

"Hidden Files Check" not working properly [^].

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

SherTeks10-May-09 21:26

SherTeks

10-May-09 21:26

I have a DWORD value 1619.

Corresponding error message to this value is :
"This installation package could not be opened. verify that the package exists and that you
can access it, or contact the application vendor to verify that this is a valid windows installer
package"

Is there a way (an API) which I could use to get the error message (as a string) by providing the DWORD value ?

Thanks in advance

Re: How to get Error message string ?

CPallini10-May-09 21:31

CPallini

10-May-09 21:31

Sometimes

documentation [^] helps.
Smile | :)

Multithreading in VC++

diptipanchal10-May-09 20:09

diptipanchal

10-May-09 20:09

i have an application where i have to connect 3 deivce on TCP/IP. I would receive data from any of the device when it requested from the PC.

Could any one help me on how to proceed about this requirement. I read few literature on Multi threading but i am not sure how to implement multithreading in VC++.

Re: Multithreading in VC++

_AnsHUMAN_ 10-May-09 20:17

_AnsHUMAN_

10-May-09 20:17

diptipanchal wrote:
Could any one help me on how to proceed about this requirement

Yes, I can.

diptipanchal wrote:
I read few literature on Multi threading but i am not sure how to implement multithreading in VC++.

SO what is the problem now? Didn't you understand the mechanism for multithreading ie how to start the threads and keep on collecting data for each one of them.
Have you started to write some code and can you show it?

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: Multithreading in VC++

Cedric Moonen10-May-09 20:23

Cedric Moonen

10-May-09 20:23

Here[^] is one of the best article on the subject. There are code snippet and all so it contains everything you need.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Multithreading in VC++

__yash__10-May-09 21:15

__yash__

10-May-09 21:15

Hello all,
I have a doubt here:
If i have three socket connections does it make it necessary to have them in 3 separate threads(to ensure concurrent reception of data from all three)? Or is it that since the OnReceive() functions of the respective socket class are independent events that are all capable of getting triggered at the same time (as perceived by the application), thus, can exist under one single thread?

Timers in Windows

Mohammad Khodaea10-May-09 19:54

Mohammad Khodaea

10-May-09 19:54

Hi friends,
I'm researching on Timers in Windows and I've read "Timers Tutorial" in codeproject from this link:
"http://www.codeproject.com/KB/system/timers_intro.aspx" but I would like to know:
Do we have any timer with the nanosecond precision or no?

Thanks in advance

_AnsHUMAN_ 10-May-09 20:12

_AnsHUMAN_

10-May-09 20:12

Mohammad Khodaea wrote:
Do we have any timer with the nanosecond precision or no?

AFAIK, No

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Chandrasekharan P10-May-09 20:17

Chandrasekharan P

10-May-09 20:17

I don't think nanosecond precession is possible with windows timers. But i believe with multimedia timers nanosecond precession is possible.

Cedric Moonen10-May-09 20:26

Cedric Moonen

10-May-09 20:26

Mohammad Khodaea wrote:
Do we have any timer with the nanosecond precision or no?

No, and anyway Windows is not a real-time operating system so you can't achieve that precision. I'm afraid you'll need to switch to a real-time operating system and I'm even not sure that you'll be able to reach that precision.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Madhu Nair10-May-09 20:56

Madhu Nair

10-May-09 20:56

Mohammad Khodaea wrote:
Do we have any timer with the nanosecond precision or no?

I think Yes! please check QueryPerformanceCounter

You can find C# code and details here[^]

Mohammadj11-May-09 0:37

Mohammadj

11-May-09 0:37

see this

visualcsamples.blogspot.com/2009/01/microsoft-visual-c-timer-example.html

i made it...