C / C++ / MFC

kakan23-Apr-07 20:47

kakan

23-Apr-07 20:47

Shouldn't happen. Does your code look something like this?

if (hFile == INVALID_HANDLE_VALUE) 
{ 
   DWORD dw = GetLastError();
   // Examine dw!
   AfxMessageBox( "File cant be created ");
   //return 0;
}

Alcohol. The cause of, and the solution to, all of life's problems - Homer Simpson

Hamid_RT23-Apr-07 19:54

23-Apr-07 19:54

See Creating and Opening Files[^] if helpfuls for you

WhiteSky

Michael Dunn23-Apr-07 20:27

Michael Dunn

23-Apr-07 20:27

Could be a lot of things. What is in m_storagePath? Does the file exist? Do you have read and write access to it? Does some other process have it open and it's only shared for reading?

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ

Ford, what's this fish doing in my ear?

vijay_aroli23-Apr-07 23:09

vijay_aroli

23-Apr-07 23:09

you can get the error string by using FormatMessage(). Just change the code to as shown below. This will display the error string corresponding to that of error code.

hFile = CreateFile( m_storagePath,<br />
                    GENERIC_READ|GENERIC_WRITE, <br />
                    FILE_SHARE_READ,<br />
                    NULL,<br />
                    OPEN_ALWAYS,<br />
                    FILE_ATTRIBUTE_NORMAL,<br />
                    0);<br />
<br />
<br />
if (hFile == INVALID_HANDLE_VALUE) <br />
{ <br />
	LPVOID lpMsgBuf;<br />
	FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | <br />
		FORMAT_MESSAGE_FROM_SYSTEM | <br />
		FORMAT_MESSAGE_IGNORE_INSERTS,<br />
		NULL,<br />
		GetLastError(),<br />
		MAKELANGID( LANG_NEUTRAL, SUBLANG_DEFAULT ), <br />
		( LPTSTR ) &lpMsgBuf,<br />
		0,<br />
		NULL );<br />
	<br />
	// Print the error message.<br />
	cout << endl << (LPCTSTR)lpMsgBuf << endl;<br />
<br />
	// Free the buffer.<br />
	LocalFree( lpMsgBuf );<br />
}

Regards,
Vijay.

God may not give us what we 'want', but he surely gives us what we 'need'.

CSplitterWnd

Nishad S23-Apr-07 19:33

Nishad S

23-Apr-07 19:33

How can we change the size of the splitter bar in a splitter window?

- NS -

Parthi_Appu23-Apr-07 19:54

Parthi_Appu

23-Apr-07 19:54

Derive a custom class from CSplitterWnd class. In the constructor of derived class change the value of m_cxSplitter and m_cySplitter. Simply doing this will slove your problem and use the derived class instance Smile | :)

Do your Duty and Don't expect the Result

Nishad S23-Apr-07 21:07

Nishad S

23-Apr-07 21:07

Thanks a lot...

I found some other useful variables too... Smile | :)

- NS -

Nibu babu thomas24-Apr-07 0:32

Nibu babu thomas

24-Apr-07 0:32

NS17 wrote:
I found some other useful variables too

Just curious... Wink | ;)

Nibu thomas
A Developer

Programming tips[^] My site[^]

Active-x component instance creation takes more time.

Mark Salsbery24-Apr-07 8:46

Mark Salsbery

24-Apr-07 8:46

I use these (where splitterwidth is the size of the splitter I want and borderwidth is the size
of the 3-D border around the views:

m_cxSplitter = m_cySplitter = splitterwidth + borderwidth * 2;
m_cxBorderShare = m_cyBorderShare = 0
m_cxSplitterGap = m_cySplitterGap = splitterwidth + borderwidth * 2;
m_cxBorder = m_cyBorder = borderwidth;

I also added customizable colors to all individual borders and the splitter which required a
CSplitterWnd::OnDrawSplitter() override.

I almost wrote an article for it (it all started in response to a CP question) but I noticed
hundreds of articles were already there LOL.

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

praveen kumar agarwal23-Apr-07 18:50

praveen kumar agarwal

23-Apr-07 18:50

sir,

I am working on vc++ project and it is based on document view architecture and I am trying to embed an active-x component into my project.
why it takes more time, when i try to create a component on the display document for the first time. The same component when i try to create subsequent time it takes less time. could you please throw some light on it.

Thanks & Regards,
Praveen A.
praveena@navayuga.co.in
pv_pravin@yahoo.co.in

Setup file pbm

prathuraj23-Apr-07 18:35

prathuraj

23-Apr-07 18:35

To hide a dos windwow,
I placed the following line in the top of progam under all include files and the dos window will not be appeared when run the program.

#pragma comment(linker, "/subsystem:\"windows\" /entry:\"mainCRTStartup\"")

But,

I take the exe and add it to the setup file(build in .net) the dos window will appear.what a pbm.how to hide the dos window.

Re: Setup file pbm

Don Box23-Apr-07 21:25

Don Box

23-Apr-07 21:25

I can help u regarding this. But make u'r doubt more specific.

Come online at:-
jubinc@skype

Arrays in VC++ 2005

Debun23-Apr-07 18:13

Debun

23-Apr-07 18:13

Hello ,
Can anyone help with the declaration of arrays on the .NET 2.0 platform ? I get an error "subscript requires array or pointer type . Codes listed below Confused | :confused:

public: System::Void convertStringToBinary(String ^myString)
{
binaryVal = "";
__wchar_t characterArray gcnew[];
characterArray = new __wchar_t gcnew[myString->Length];
myString->CopyTo(0, characterArray, 0, myString->Length);

for(unsigned long int i=0; i<characterarray->Length; i++)
{
binaryVal = String::Concat(binaryVal, characterArray[i]>=128 ? "1":"0");
characterArray[i] %= 128;

D

Re: Arrays in VC++ 2005

Hamid_RT23-Apr-07 19:22

23-Apr-07 19:22

You can ask your question (Managed) C++/CLI[^]

WhiteSky

Re: Arrays in VC++ 2005

Mark Salsbery24-Apr-07 8:52

Mark Salsbery

24-Apr-07 8:52

Maybe something like:

array<__wchar_t> ^characterArray = gcnew array<__wchar_t>(myString->Length);

And yes, this should be posted on the C++/CLI board Smile | :)

Mark

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: Arrays in VC++ 2005

Debun24-Apr-07 15:47

Debun

24-Apr-07 15:47

Thanks it worked Laugh | :laugh:

RSS Reader

pronk4prez23-Apr-07 13:06

pronk4prez

23-Apr-07 13:06

I need to create a quick/easy RSS Reader. Can anyone help me with the code/ or where to get it?

Re: RSS Reader

Hamid_RT23-Apr-07 19:21

LogOnUser takes 15 secs to return [modified]

23-Apr-07 19:21

Here[^] is an example of course its C++/CLI

WhiteSky

AAKAra23-Apr-07 10:04

AAKAra

23-Apr-07 10:04

Hi,
I am using LogOnUser() API to check whether My application has similliar logon username and password same as my windows username and password. If i give a wrong user name and password it takes almost 15 secs to return. Is there a way i could make it faster?
BOOL bRes = LogonUser( m_strUser,
NULL /*domain*/,
m_strPassword,
LOGON32_LOGON_NETWORK /*dwLogonType*/,
LOGON32_PROVIDER_DEFAULT /*dwLogonProvider*/,
&hUserHandle);

It is because of passing NULL for the domain name, there are around 10 domains and that is the reason it takes so much of time i guess. Is there a way to get the current doamin pls suggest how to go about?

-- modified at 16:31 Monday 23rd April, 2007

Re: LogOnUser takes 15 secs to return

David Crow23-Apr-07 10:38

David Crow

23-Apr-07 10:38

AnilUnni wrote:
Is there a way to get the current doamin

Use NetWkstaUserGetInfo(NULL, 1, ...).

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

dll problem.

david bagaturia23-Apr-07 7:19

david bagaturia

23-Apr-07 7:19

Hi all.

I wont add to my project .dll file.
can help?

Re: dll problem.

Mark Salsbery23-Apr-07 7:24

Mark Salsbery

23-Apr-07 7:24

You wont or want?

Add what to the .dll file?

Confused | :confused:

"Posting a VB.NET question in the C++ forum will end in tears." Chris Maunder

Re: dll problem.

David Crow23-Apr-07 7:24

David Crow

23-Apr-07 7:24

Ok, so what's the problem? Do you want to load it explicitly or implicitly?

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

Re: dll problem.

Hamid_RT23-Apr-07 7:35