Restarting your application - C / C++ / MFC Discussion Boards

Re: Is there any built in separator control in MFC?

DevMentor.org27-Jul-07 8:21

DevMentor.org

27-Jul-07 8:21

Are you "the" Don Box who wrote a book on COM?

Yours Truly, The One and Only!

Re: Is there any built in separator control in MFC?

Haroon Sarwar25-Jul-07 19:19

Haroon Sarwar

25-Jul-07 19:19

in the dialog resource editor add a picture control and set it's Type to Ethced Horz

Restarting your application

Programm3r25-Jul-07 4:07

Programm3r

25-Jul-07 4:07

Hi all,

How would one go about restarting an application ? (i.e. for re-configuration purposes)

Thanks in advance
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: Restarting your application

Iain Clarke, Warrior Programmer25-Jul-07 4:13

Iain Clarke, Warrior Programmer

25-Jul-07 4:13

I can't think of a little api to do it, but it wouldn't be too hard to write a small second program.

A.EXE
fire up B.EXE, and pass B its process handle as a parameter.

B.EXE:
wait for process A to die (for a finite length of time!)
start another A.EXE (perhaps with a "/restarted" flag?)
die!

A.EXE
carry on where you left off.

Iain.

Re: Restarting your application

Cyrilix25-Jul-07 4:15

Cyrilix

25-Jul-07 4:15

By writing a wrapper application that calls your application?

Why do you need to do this? Restarting an application programmatically, unless it's a service, is something that I haven't heard of.

Re: Restarting your application

Programm3r25-Jul-07 4:25

Programm3r

25-Jul-07 4:25

Cyrilix wrote:
Why do you need to do this?

Cause when the data in my config file has changed, I need to get the new data. So I thought a restart would be the way to go .... I think I should call the function that reads the config data ... but still a good question I think.

Thanks for your input
Regards,

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: Restarting your application

Jonathan [Darka]25-Jul-07 4:15

Jonathan [Darka]

25-Jul-07 4:15

Do you really need to restart ?

You could just re-read the configuration data.

Jonathan Wilkes
Darka[Xanya.net]

Restarting your application

Programm3r25-Jul-07 4:47

Programm3r

25-Jul-07 4:47

Hi,

Earlier suggestions about re-reading config data, won't work, see I have a loop that is running, that inserts data. I need to change the ODBC DSN connection string and certain field names that may have changed.

This might cause a problem when a update is busy. So back to my first question ,how to restart the application, and the previous sentance states the need for a restart.

The only programmers that are better that C programmers are those who code in 1's and 0's Green Alien | [Alien]

Programm3r
My Blog: ^_^

Re: Restarting your application

David Crow25-Jul-07 5:10

David Crow

25-Jul-07 5:10

Programm3r wrote:
So back to my first question ,how to restart the application...

What's wrong with Iain's suggestion.

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Restarting your application

CPallini25-Jul-07 5:02

CPallini

25-Jul-07 5:02

I think that the current instance of your application can start a new one of itself (for instance using CreateProcess) and then exit.
I don't know if it is a viable scenario for you.
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.

Re: Restarting your application

Haroon Sarwar25-Jul-07 19:24

Haroon Sarwar

25-Jul-07 19:24

you could just pop a message box telling the user to restart the application... Big Grin | :-D

How to use ConnMgrQueryDetailedStatus() API

dishadiv25-Jul-07 4:06

dishadiv

25-Jul-07 4:06

Hi,

ConnMgrQueryDetailedStatus() API fails due to error in connmgr.exe
Can anyone write a sample code to make use of ConnMgrQueryDetailedStatus()API and retrieve the contents of the structure it fills.
Thanks

Re: How to use ConnMgrQueryDetailedStatus() API

Jonathan [Darka]25-Jul-07 4:16

Jonathan [Darka]

25-Jul-07 4:16

what error do you get ?

Jonathan Wilkes
Darka[Xanya.net]

Re: How to use ConnMgrQueryDetailedStatus() API

dishadiv25-Jul-07 4:22

dishadiv

25-Jul-07 4:22

I'm developing a winmobile6 application(using emulator).I'm not able to find the return type (HRESULT)on execuuting ConnMgrQueryDetailedStatus().
Its throws a runtime error on executing the API.
"A problem has occurred with connmgr.exe"

Re: How to use ConnMgrQueryDetailedStatus() API

Jonathan [Darka]25-Jul-07 4:27

Jonathan [Darka]

25-Jul-07 4:27

You could trying running a debug logging utility to see if anything is output by the crashing application, such as DebugVew or even setup a Symbol Server to get full call stack information, but you'd have to get it to crash under your debugger for that to help.

Sorry I can't be of more help.

regards,

Jonathan Wilkes
Darka[Xanya.net]

Re: How to use ConnMgrQueryDetailedStatus() API

dishadiv25-Jul-07 4:29

dishadiv

25-Jul-07 4:29

ok.

Thanks

Hardware Device Status

mcsherry25-Jul-07 3:55

mcsherry

25-Jul-07 3:55

When you use the Device Manager within Windows to look at any connected devices (i.e. keyboard) it has a 'Device Status' field. Can anyone tell me how I can access this information?

cheers,
Andy

Re: Hardware Device Status

ashukasama25-Jul-07 4:13

ashukasama

25-Jul-07 4:13

have a look

DeviceIoControl

Device Management Control Codes

http://msdn2.microsoft.com/en-us/library/aa363226.aspx

Re: Hardware Device Status

mcsherry25-Jul-07 5:51

mcsherry

25-Jul-07 5:51

Hi, thanks for your reply, I'm not sure that this does what I require (could be that I'm misunderstanding it. I've found the following articles which do what I want however it seems a bit overkill to have to install the Windows DDK just to access this information:

http://www.codeproject.com/system/EnumDeviceProperties.asp[^]

http://www.codeproject.com/system/EnumDevices.asp[^]

is there a simpler way of doing this?

TIA,
Andy

Re: Hardware Device Status

Iain Clarke, Warrior Programmer25-Jul-07 5:54

Iain Clarke, Warrior Programmer

25-Jul-07 5:54

As I understand, you will only need the DDK for the headers when you're compiliing the application, not for an end user to run it...

Just make sure to test on a more normal envirnnment before distribution!

Iain.

Using Conditional operator v/s if-else statements

AmbyJaved25-Jul-07 3:51

AmbyJaved

25-Jul-07 3:51

Hi,

I have a function which i am trying to optimize.The structure is something like this
for(..)
for(...)
if(cond true)
val = 0;
else
val = 1;

The outer loop repeats for about 600 times and the inner loop 400 times.This structure is repeated in a lot of places in the entire code.I want to know if i can attain some performance gain if i used conditional operator(?) instead of the if-else statements since it is within a loop.

Thanks
AJ

Re: Using Conditional operator v/s if-else statements

CPallini25-Jul-07 3:55

CPallini

25-Jul-07 3:55

IMHO no gain. Sigh | :sigh:

However, maybe you can improve the overall design to increase performance.
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.

Re: Using Conditional operator v/s if-else statements

#realJSOP26-Jul-07 2:24

#realJSOP

26-Jul-07 2:24

It seems to me that you would want to break out of the loop as soon as possible. Not having enough info to make an "educated guess", I present you with code based on the "wild-assed guess".

int nVal = 0;
for (int i=...)
{
    for (int j=...)
    {
        nVal = (condition is true) ? 1 : 0;
        if (nVal != 0)
        {
            break;
        }
    }
    if (nVal != 0)
    {
        break;
    }
}

"Why don't you tie a kerosene-soaked rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt, 1997
-----
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

WM_SETTEXT - Pass a string...

Ylno25-Jul-07 3:44

Ylno

25-Jul-07 3:44

Hello All,

Sorry if this question is off topic. I've just started messing around with C++.

I'm trying to set the Text property of a window using :

<br />
     SendMessage(handle,WM_SETTEXT,0,(LPARAM)"Hello");<br />

This works fine. The proplem comes when i try the replace "Hello" with a string
variable like so:

<br />
string s;<br />
    s = "Hello";<br />
    SendMessage(handle_of_editbox,WM_SETTEXT,0,(LPARAM)s);<br />

I get the following error: "Struct 'std::string' used where a "LPARAM" was expected.
And if i don't use the cast the error says it can not convert string to LPARAM.

How can i avoid this?

Thanks

Re: WM_SETTEXT - Pass a string...

Nemanja Trifunovic25-Jul-07 3:47

Nemanja Trifunovic

25-Jul-07 3:47

SendMessage(handle_of_editbox,WM_SETTEXT,0,(LPARAM)s.c_str());

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