C / C++ / MFC

Re: Totally confused with memory alocation for '_get_pgmptr' function

25-Jun-07 21:30

Problem solved. Thanks. Rose | [Rose]

I need to use this function in c++ console app, and the documentation says:

errno_t <code>_get_pgmptr</code>( char **pValue );

pValue
A pointer to a string to be filled with ...

So I did this:

	char *path = new char[MAX_PATH+1];
	memset(path, NULL, MAX_PATH + 1);

	<code>_get_pgmptr</code>(&path);
...
        delete[] path;

But the call to the function, changes the address of the pointer(path) and calling the delete will fail.
I thought first that perhaps, I don't need to allocate any memory and the function (oddly) allocates it automatically and sends me the address but this is not the case either. Can anyone tell me what's wrong with this?

-- modified at 8:18 Tuesday 26th June, 2007

Rajkumar R25-Jun-07 21:58

Rajkumar R

25-Jun-07 21:58

Hi,
It gets the current value of the _pgmptr, a global variable which contains the file path. You need not allocate the buffer.
What happen if you pass without allocating?

Re: Totally confused with memory alocation for '_get_pgmptr' function

Hamed Musavi25-Jun-07 22:16

Re: Totally confused with memory alocation for '_get_pgmptr' function

25-Jun-07 22:16

I found the problem was another mistake! You're right and the function gets a pointer to that variable.

I forgot to remove my question here, I guess I posted too soon, before investigating the code completely. Sorry!

Anyway, Thanks a lot for your attention and reply. Smile | :)

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

KaЯl25-Jun-07 22:48

KaЯl

25-Jun-07 22:48

No need to strike your question, it could be useful for others Smile | :)

The most wasted of all days is that on which one has not laughed

Fold with us! ¤ flickr

Re: Totally confused with memory alocation for '_get_pgmptr' function

Hamed Musavi26-Jun-07 2:19

Re: Totally confused with memory alocation for '_get_pgmptr' function

26-Jun-07 2:19

Done.

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

KaЯl26-Jun-07 2:39

KaЯl

26-Jun-07 2:39

Thanks from the community Smile | :)

When they kick at your front door
How you gonna come?
With your hands on your head
Or on the trigger of your gun?

Fold with us! ¤ flickr

What is the error in this code fragment

xbiju25-Jun-07 21:16

xbiju

25-Jun-07 21:16

Why does te following C++ code flag error?

# include

const int i=10;
void main()
{
const int i = 20;
cout << i << endl << ::i;
cout << &i;
}

The error flagged is "Illegal structure operation in main"
Compiler use : Borland C++ 4.5
How can I access the address of the local and global constant 'i's?

Please help me.

Thanks,

Biju

Re: What is the error in this code fragment

Hamed Musavi25-Jun-07 21:33

Re: What is the error in this code fragment

25-Jun-07 21:33

Nothing is in front of #include

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

Hamid_RT25-Jun-07 22:28

Re: What is the error in this code fragment

25-Jun-07 22:28

Your code print 20 with address of i whats the problem?

WhiteSky

Mark Salsbery26-Jun-07 7:08

Mark Salsbery

26-Jun-07 7:08

xbiju wrote:
How can I access the address of the local and global constant 'i's?

Address of local is &i
Address of global is &::i

In the words of WhiteSky, what's the problem? Smile | :)

"Go that way, really fast. If something gets in your way, turn."

Tab Order

_anil_25-Jun-07 20:37

25-Jun-07 20:37

I am creating some control over a form at run time.
How to set the tab order for these controls.

Regards
Anil

Hamed Musavi25-Jun-07 21:54

25-Jun-07 21:54

Sorry, I first did not notice it's on runtime.

I'm not sure if it is possible to change tab order at runtime, because as far as I know, controls orders depends on the order they have been created.

I mostly use these 2 function:
GetNextDlgTabItem to get the next control in the focus order
SetFocus to set the focus to a particular control when user presses a key (e.g. Enter = OnOk).

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

Hamid_RT25-Jun-07 22:32

25-Jun-07 22:32

See here[^]

WhiteSky

Hamed Musavi25-Jun-07 22:41

25-Jun-07 22:41

Your right. It changes z order and place it after the first handle.

I already used this API several times, but never for this purpose.

Thanks, I learned something Smile | :)

// "Life is very short and is very fragile also." Yanni
while (I'm_alive)
{
cout<<"I love programming.";
}

Hamid_RT25-Jun-07 22:21

25-Jun-07 22:21

See this[^] thread.

WhiteSky

_anil_25-Jun-07 23:19

Resizing list control with splitter and window

25-Jun-07 23:19

Thanks
This is exactly what I was looking for.

Regards
Anil

neha.agarwal2725-Jun-07 20:20

neha.agarwal27

25-Jun-07 20:20

Hello all,

I have made a SDI window and divided it into two parts using splitter control. Now my problem is i have made 2 classes that are derived from CFormView. In that i have made a List control. Now what i want is when i resize the window or splitter control my list control should adjust itself accordingly. How to do it. Can anybody help me in this?

Thanks in advance

_anil_25-Jun-07 20:42

25-Jun-07 20:42

As u have told the listcontol is in a fromview.
On the OnSize of the form view resize the ListControl.

LookFor OnSize, MoveWindow, ScreenToClient

Regards
Anil

neha.agarwal2725-Jun-07 21:08

neha.agarwal27

25-Jun-07 21:08

Please can you tell me the code. i am doing it but its not working correctly.

Rajkumar R25-Jun-07 21:29

Rajkumar R

25-Jun-07 21:29

Hi,
I remember I suggested solution for the same problem just before 2 or 3 days. Could you please post what you have done to resize.

Best regards
Raj

_anil_25-Jun-07 21:56

how to split a dialog box?

25-Jun-07 21:56

void CYourFormView::OnSize(UINT nType, int cx, int cy)
{
CFormView::OnSize(nType, cx, cy);

// Size the tree control according to size of bar
if( m_LstCtrl.GetSafeHwnd() != NULL ){

// Get the current control position
CRect rcListSize;
m_LstCtrl.GetWindowRect( rcListSize );

// Change to screen cordinate
ScreenToClient( rcListSize );

// Change the size of the tree control
m_LstCtrl.MoveWindow( rcListSize.left, rcListSize.top, cx - rcListSize.left, cy - rcListSize.top);
}
}

if u r not able to do then as Rajkumar said I also like to know which way u r trying. so post some code too.

Regards
Anil

vikramkarthik25-Jun-07 18:52

vikramkarthik

25-Jun-07 18:52

Hello every one..
my question is how i can split my dialog window ..
help me..
vikram.

Re: how to split a dialog box?

Perspx25-Jun-07 19:57

Perspx

25-Jun-07 19:57

How do you mean split a dialog window? As in slice a window in half to create two windows with a splitter bar in the middle?

--PerspX

Re: how to split a dialog box?

Hamid_RT25-Jun-07 22:36