C / C++ / MFC

Chandrasekharan P2-Apr-08 0:33

2-Apr-08 0:33

no. i don't expect that from u.. at times it happens that u go bonkers...at such situations u send these queries...

anyways thanks yaar.

Rajkumar R2-Apr-08 1:12

Rajkumar R

2-Apr-08 1:12

Chandrasekharanp wrote:
at times it happens that u go bonkers

thats true.

yaar, Ok I try to be generous, And is n't the previous reply useful. or what part you feel you need help.

Chandrasekharan P2-Apr-08 1:46

2-Apr-08 1:46

it really helped me.. when i saw it i felt bad that i asked something like this... Frown | :-(

will certainly ask u if there is something needed..

Chandrasekharan P2-Apr-08 1:51

2-Apr-08 1:51

if i have to send the selected items to another listbox what functionality should be used?

Rajkumar R2-Apr-08 19:05

Rajkumar R

2-Apr-08 19:05

If you got how to get the selected items from List box and how to add list box items then mix these functionality.

Chandrasekharan P2-Apr-08 19:26

2-Apr-08 19:26

Guess i got a problem here...

i am sending u the code.. please help me in this.

say i have 10 items in the listbox. not if i i click the 4 to the 8th item in the listbox, the first 5 items are displaying the listbox.

<br />
	CArray<int,int> aryListBoxSel;<br />
		int nCount = m_listbox.GetSelCount();<br />
		aryListBoxSel.SetSize(nCount);<br />
		m_listbox.GetSelItems(nCount, aryListBoxSel.GetData());<br />
		<br />
		for(int i=0;i<m_listbox.getselitems(ncount,arylistboxsel.getdata());i++)><br />
		{<br />
			CString str,str2;<br />
			int n;<br />
			//str.Format("%d",m_listbox.GetCurSel());<br />
			n=m_listbox.GetTextLen(i);<br />
			m_listbox.GetText(i,str.GetBuffer(n));<br />
			m_list.AddString(str);<br />
		}<br />
<br />
what is the reason for that?<br />
<br />
<br />
</m_listbox.getselitems(ncount,arylistboxsel.getdata());i++)></int,int>

Rajkumar R2-Apr-08 20:44

Rajkumar R

2-Apr-08 20:44

You got the selected indeces in aryListBoxSel; and you are using your own index, i for getting the selected text where i varies from 0 that i swhy you got the first 5 items. you have to use some thing like m_listbox.GetTextLen(aryListBoxSel[i]), m_listbox.GetText(aryListBoxSel[i],str.GetBuffer(n));

Chandrasekharan P2-Apr-08 21:20

2-Apr-08 21:20

thanks a lot. a simple mistake costed me a lot of time.. better late than never.. thanks anyways.

Chandrasekharan P3-Apr-08 0:57

3-Apr-08 0:57

Doubts again,

I was telling u that i have to merge the selected files. i know that i can use CFile to do the reading and writing of files. but when we select the file how do we store each file name? when i tried to use the array its giving me an assertion error.

why use StartService to start a driver service failed?

Hamid_RT7-Apr-08 3:51

Hamid_RT

7-Apr-08 3:51

Except DlgDirList you can use of FindFirstFile/FindNextFile.

kcynic1-Apr-08 21:45

kcynic

1-Apr-08 21:45

I followed the tutorial here [^]:
create the driver service and start it if created successfully. After creating or open the service successfully,it start the service failed. I use GetLastError and find the error code is 2.
I don't know why,and how to fix it?

Regards.

Re: why use StartService to start a driver service failed?

Jonathan [Darka]1-Apr-08 23:01

Jonathan [Darka]

1-Apr-08 23:01

Before asking a question here you should really spend some time trying to debug the problem.

What happens if you attempt to debug it ?

Error code 2 = The system cannot find the file specified.

regard,
Jonathan

Jonathan Wilkes
Darka[Xanya.net]

Re: why use StartService to start a driver service failed?

kcynic1-Apr-08 23:10

kcynic

1-Apr-08 23:10

Of course I did. I know what error code 2 means.
But the real problem is that,the file(example.sys) does exist.

Regards

Re: why use StartService to start a driver service failed?

JudyL_MD2-Apr-08 2:00

JudyL_MD

2-Apr-08 2:00

Look in the registry and check what the entries added by the SCM look like. The ImagePath entry is probably not correct.

Judy

OLESTR

George_George1-Apr-08 21:26

1-Apr-08 21:26

Hello everyone,

When we use OLESTR to allocate a variable from string literal, like OLESTR("Hello World"), the memory space for the string literal is on stack, right?

I can not find official document for this from MSDN.

thanks in advance,
George

CPallini1-Apr-08 21:52

CPallini

1-Apr-08 21:52

George_George wrote:
When we use OLESTR to allocate a variable from string literal, like OLESTR("Hello World"), the memory space for the string literal is on stack, right?

Nope, String literals don't follow the lifetime rules of the variables allocated on the stack. AFAIK they are always allocated on read-only memory.
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

George_George1-Apr-08 22:26

1-Apr-08 22:26

Thanks CPallini,

So, we can feel free to pass the OLESTR pointer, which points to an OLESTR allocated in one function to another function (I mean passing the address of OLESTR string literal)?

regards,
George

CPallini1-Apr-08 22:45

CPallini

1-Apr-08 22:45

Yes.

George_George1-Apr-08 22:55

1-Apr-08 22:55

Cool, CPallini!

Question answered.

BTW: do you have any support document which declares OLESTR string literal is in global read-only memory other than stack memory?

regards,
George

toxcct1-Apr-08 22:55

toxcct

1-Apr-08 22:55

technically, yes, with your VC compiler. however, you should know that it's only because of the optimizer, and some other compilers may not behave identically. so I'd say not to make such assumptions then...

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George_George1-Apr-08 23:01

1-Apr-08 23:01

Thanks toxcct,

1.

Do you mean when we enable string pooling, OLESTR string literal will be in global read-only memory, and it is safe to pass from one OLESTR pointer pointed to string allocated in one function to another function.

2.

If we do not enable string pooling, OLESTR string will be in stack, and above operation is not safe?

3.

You always treat OLESTR in stack? Other than in global accessible memory area?

regards,
George

toxcct1-Apr-08 23:04

toxcct

1-Apr-08 23:04

I won't answer each specific question, because as I already said in my previous post, all this is compiler/optimizer specific, and the C++ standard does dictate a single behavior for that...

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George_George1-Apr-08 23:13

1-Apr-08 23:13

I am more interested in which option in MSVC could be used to control such optimization? The string pooling option?

regards,
George

toxcct1-Apr-08 23:17

toxcct

1-Apr-08 23:17

George_George wrote:
I am more interested in which option in MSVC could be used to control such optimization?

Why ?

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George_George1-Apr-08 23:29