C / C++ / MFC Discussion Boards

read bytes in a buffer

kani9817-May-07 8:23

kani98

17-May-07 8:23

Is there a C/C++ function that will tell how many bytes are valid in a buffer?

Re: read bytes in a buffer

C^hris L^osinger17-May-07 8:30

C^hris L^osinger

17-May-07 8:30

not in general.

if it was allocated with GlobalAlloc/HeapAlloc, you can get the size with GlobalSize/HeapSize.

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Re: read bytes in a buffer

David Crow17-May-07 8:58

David Crow

17-May-07 8:58

kani98 wrote:
Is there a C/C++ function that will tell how many bytes are valid in a buffer?

Of course not. That can only be determined by the code that placed those bytes in the buffer to begin with.

"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: read bytes in a buffer

led mike17-May-07 9:19

led mike

17-May-07 9:19

Yes

What's a "buffer"?

led mike

Re: read bytes in a buffer

Rick York17-May-07 10:26

Rick York

17-May-07 10:26

and what is valid ?

The index of the first character of the substring searched for when successful; otherwise npos.

Immunity1817-May-07 7:47

Immunity18

17-May-07 7:47

what npos means?

i want to make a while( string.Find() )

which will be terminate (the while) when there isnt any foundation

Re: The index of the first character of the substring searched for when successful; otherwise npos.

David Crow17-May-07 8:57

David Crow

17-May-07 8:57

Immunity18 wrote:
what npos means?

It's a member of basic_string.

npos

"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: The index of the first character of the substring searched for when successful; otherwise npos.

Immunity1817-May-07 9:08

Immunity18

17-May-07 9:08

thanks !

Control IDs not showing in ClassWizard

jpyp17-May-07 6:58

jpyp

17-May-07 6:58

I created a new dialog window that includes a number of push-buttons and radio-buttons. When I open ClassWizard I see all my IDs in the "Object IDs" list on the "Message Maps" tab. However on the "Member Variables" tab, some of the IDs are not showing in the "Control IDs" list.

I have other dialog windows that are set up the same way and I don't have this problem.
What can cause this?
I am using MS VC6.

Thanks!

jpyp

Re: Control IDs not showing in ClassWizard

David Crow17-May-07 7:12

David Crow

17-May-07 7:12

jpyp wrote:
However on the "Member Variables" tab, some of the IDs are not showing in the "Control IDs" list.

Because those controls do not have the WS_GROUP style.

"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: Control IDs not showing in ClassWizard

jpyp17-May-07 8:40

jpyp

17-May-07 8:40

Thanks that did the trick.

However I don't understand why all my push-buttons IDs on that window are showing on the "Member Variables" tab as none of them except one has this property set. Furthermore my radio-buttons in my other windows do not have the WS_GROUP property set, and they are all showing on the "Member Variables" tab. Both windows have the same properties and are created the same way.

Something else seems to be going here. Any idea?
Thanks!

jpyp

Thread storage

tom groezer17-May-07 5:19

tom groezer

17-May-07 5:19

What is the significance of heap, stack and TLS and how do they differ wrt each other. An explanation or some links would be highly appreciated.

Re: Thread storage

David Crow17-May-07 5:23

David Crow

17-May-07 5:23

tom groezer wrote:
What is the significance of heap, stack and TLS...

Heap
Stack
TLS

"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: Thread storage

confid3nce17-May-07 7:14

confid3nce

17-May-07 7:14

hello bro...i am new to java and i want to learn this language..from where should i start? i want to make one programme for my work...plz help me..okay...hoping for your favaourable response......your's faithfully......

Re: Thread storage

David Crow17-May-07 7:17

David Crow

17-May-07 7:17

confid3nce wrote:
i want to learn this language

Java or C++?

confid3nce wrote:
from where should i start?

At the beginning.

confid3nce wrote:
i want to make one programme for my work

That's it? Just one?

confid3nce wrote:
hoping for your favaourable response

Lot's o' luck!

"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: Thread storage

Hamid_RT17-May-07 9:11

Hamid_RT

17-May-07 9:11

DavidCrow wrote:
At the beginning.

WhiteSky

Embed Access GUI in C++ Dialog

TedWagstaff17-May-07 5:04

TedWagstaff

17-May-07 5:04

My user community would like me to use the MS Access Table view GUI to edit the contents of an internal table that is a copy of a database table. The table is to manipulated in a modeless dialog. Obviously, it would be most productive to embed parts of the MS Access code in my code. My questions are:
1. Possible?
2. Feasible?
3. If feasible, some pointers on how to do this so that changes are immediately available to the C++ program would be appreciated.
Thanks in advance.

TedWagstaff

Re: Embed Access GUI in C++ Dialog

David Crow17-May-07 5:24

David Crow

17-May-07 5:24

TedWagstaff wrote:
Obviously, it would be most productive to embed parts of the MS Access code...

Are you referring to Excel's COM interface? If so, search for Excel Automation.

"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: Embed Access GUI in C++ Dialog

TedWagstaff17-May-07 5:45

TedWagstaff

17-May-07 5:45

Thanks for the pointer. It has opened some doors. Not quite the way I was thinking but that is why the post.

TedWagstaff

Simple Question: Resizing:

zqueezy17-May-07 4:53

zqueezy

17-May-07 4:53

hey folks,
i know how to create a window using create and giving it a rectangle region:

<br />
Create(NULL, "Windows Application", WS_OVERLAPPEDWINDOW,<br />
      CRect(120, 100, 700, 480), NULL);<br />

but how do I change the rectangle region...
I mean clicking on a button and resizing the window to half or stuff (better to a Rectangle I calculate)???

I know it's simple but couldn't find a link
thx in advance
zqueezy

Re: Simple Question: Resizing:

zqueezy17-May-07 5:12

zqueezy

17-May-07 5:12

well now I Found
MoveWindow
to SetThatRegion but all I get is a "Debug Assertion Failed!"...
I actually wanted to to resize a subelement of my DialogClass. So I did a movewindow in my Dialog::OnSize(...) method.

I guess the error comes from the initialization where there isn't any SubElement (although it's initialized but maybe not visible?)
because
GetWindowRect also fails with the same assertion failed

Re: Simple Question: Resizing:

CPallini17-May-07 5:14

CPallini

17-May-07 5:14

SetWindowPos[^]
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: Simple Question: Resizing:

zqueezy17-May-07 5:19

zqueezy

17-May-07 5:19

yeah so obvious, I didn't even think of it

thx

Re: Simple Question: Resizing:

Nelek17-May-07 20:27

Nelek

17-May-07 20:27

Hi,

another way to do this is to change the CSize into ChildFrm.cpp in the function PrecreateWindow ()

For xample: i make different window sizes depending of the parent element of the window

BOOL CChildFrame::PreCreateWindow(CREATESTRUCT& cs)
{	if( !CMDIChildWnd::PreCreateWindow(cs) )
		return FALSE;

	//Set the configuration for the NewViews
	CMDIChildWnd* pMDIActive = MDIGetActive();
	CDocument* pDoc = pMDIActive->GetActiveDocument();

	if ((pDoc) && (pDoc->m_szNewFrameName != ""))
	{	cs.style = WS_SYSMENU | WS_CAPTION | WS_OVERLAPPED;

		if (pDoc->m_pObject1 || pDoc->m_pObject2)
		{	cs.cx = 415;		cs.cy = 260;	}
		else if (pDoc->m_pObject3->m_nType == 0)
		{	cs.cx = 517;		cs.cy = 421;	}
		else if (pDoc->m_pObject3->m_nType == 2)
		{	cs.cx = 610;		cs.cy = 435;	}

		cs.lpszName = pDoc->m_szNewFrameName;
	}
	return TRUE;
}

With this I put the caption of the new view according to the name of the element and some other parameters, and the size according to the type of the element.

Greetings.

--------
M.D.V.

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?

Convert or Add?

Star0917-May-07 4:11

Star09

17-May-07 4:11

I have built a program which generates a tree, and allows the user to perform searches for a number entered by the user.

I want to display the tree in a graphical format as well as the available searches.

How can I convert my program to an MFC application? Or what do I add?

This project is a console application.

I'm confused.

thanks in advance.

Star08

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