C / C++ / MFC

Re: CRichEditCtrl class and ClistBox class

23-Aug-07 2:59

prithaa wrote:
What should IO do?

Explain a bit further what it is you are trying to accomplish (by placing controls on top of others in this fashion). You may have a legitimate need, or simply a misunderstanding of how things work.

"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

prithaa23-Aug-07 7:08

prithaa

23-Aug-07 7:08

Hello,

Thanks for your replies.

I have an edit box on a child window whose OnKeyUp() function calls a list box to be seen on the window.Sometimes this listbox has to appear on another editbox where the edit box is half seen.
But when the listbox appears on the editbox where the editbox is in the background and the listbox is in the foreground ,the listbox's border(lower) gets cuts and is
not visible.The area where the list box meets edit box.

My problem is that the listbox should appear on the editbox (wholelly or partly) and the mouse cursor when placed on the list box should appear on the list box not on the edit box (if edit box is below the list box)

In my case the mouse cursor when placed on the list box doesn't have the normal arrow sign but has a cursor as if placed on the edit box.

Regards,
Prithaa

MSMQ Remote Use

abhiramsss22-Aug-07 20:41

abhiramsss

22-Aug-07 20:41

Hi all,

I need some help regarding MSMQ using VC++. i am new to this concept.

let say i am running a application on LOcal Pc and i want to save some information from this application into a database which is running on a remote machine.

can you please tell how MSMQ can be used in this scenerio.if you can provide a example for this that will be a great help to me.

Thanks

abhi

shell execute

sujtha22-Aug-07 20:08

sujtha

22-Aug-07 20:08

Can anyone help me?

I tried to open the web page using shell execute in maximized mode. the command as given below:

CString webURL = "www.yahoo.com"
HINSTANCE hInstance = (HINSTANCE)ShellExecute(this->m_hWnd, _T("open"), webURL, NULL, NULL, SW_MAXIMIZE);
or
HINSTANCE hInstance = (HINSTANCE)ShellExecute(this->m_hWnd, _T("open"), webURL, NULL, NULL, SW_SHOWMAXIMIZED);

it opens the page. but it display as normal not in maximized state. first time it opens maximized. in the internet explorer, if restored and call the same command in the exe, it brings the window in the front. It displays in the normal

ThatsAlok22-Aug-07 20:12

ThatsAlok

22-Aug-07 20:12

sujtha wrote:
HINSTANCE hInstance = (HINSTANCE)ShellExecute(this->m_hWnd, _T("open"), webURL, NULL, NULL, SW_SHOWMAXIMIZED);

sound absurbd but try NULL instead of this->m_hWnd.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
Support CRY- Child Relief

sujtha22-Aug-07 20:29

sujtha

22-Aug-07 20:29

i tried null also. same problem....

Naveen22-Aug-07 21:09

Naveen

22-Aug-07 21:09

may be you should try like this

CString webURL = _T("www.yahoo.com");
HINSTANCE hInstance = (HINSTANCE)ShellExecute(0, _T("open"), _T("C:\\Program Files\\Internet Explorer\\iexplore.exe "), webURL, NULL, SW_SHOWMAXIMIZED);

nave

[OpenedFileFinder]

David Crow23-Aug-07 3:05

How can I stitch image files while scrolling?

23-Aug-07 3:05

From past experience, IE seems to want to do its own thing (e.g., use size/position from last use), rather than what you instruct it to do. I've not researched into this hardly at all, but it just seems to be this way more often than not.

You might try calling ShowWindow(hWnd, SW_SHOWMAXIMIZED) once IE is fully opened.

"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

nilo_110322-Aug-07 15:57

nilo_1103

22-Aug-07 15:57

I'm just a beginner in visual C++/MFC. Can somebody give me an idea on how can I possibly stitch/join image files to view the whole picture while moving the scrollbar. These images are pre-stitch using photoshop and guided by the *.pmg file created. An idea is to add image file to the side and remove from the other side while scrolling. I'm experiencing problems on loading the next image because this is subject to repaint and causes a noticeable delay on scrolling. Example of this is a 9x9 image files picture.
Is it possible to do this without any delay on repaint?
I hope to hear from you guys.
This would be a big help for me.

Re: How can I stitch image files while scrolling?

Nelek22-Aug-07 20:11

Nelek

22-Aug-07 20:11

Hi,

to make it without repainting will be impossible, but the delay is directly dependant on how your programm works.

I had a lot of delayment in my last project because I was creating/copying objects allover I needed something from the document. That mades have a delay of some 2 or 3 secs between doubleclicking to open a new window and having the window on the screen.

Solution? Working with pointers and accessing just the parameters I need in each concrete moment, but leaving the object in the doc.

In your project there can be different possibilities. Or you are charging images that are bigger than your container, then the computer has to edit the image to fit to size... or you are bringing the objects as me insteads of reading from a fixed place... or any other possibility.

If you post a bit of your code, relating your problem will be easier to look into.

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?

How do you check if a USB Stick is inserted?

adful22-Aug-07 13:01

adful

22-Aug-07 13:01

Just wondering, how do you check if a USB Stick is inserted? Can you recommend some reading or maybe you can post the code. Thanks!

Re: How do you check if a USB Stick is inserted?

act_x22-Aug-07 13:42

act_x

22-Aug-07 13:42

Look into the
RegisterDeviceNotification API call

You can set the filter level based on the type of device

Typically u can set a filter for type GUID_CLASS_USB_DEVICE

Now any Window class has an OnDeviceChange handler that provides a notification mechanism and inside u can check for the type ( typically GUID type) to see if its a Mass Storage Device class

Engineering is the effort !

Re: How do you check if a USB Stick is inserted?

Iain Clarke, Warrior Programmer23-Aug-07 1:43

Iain Clarke, Warrior Programmer

23-Aug-07 1:43

Have you tried looking on a well know site full of programming articles? Perhaps in the system section?

http://www.codeproject.com/useritems/Drive_Detect.asp[^]

Iain.

Re: How do you check if a USB Stick is inserted?

David Crow23-Aug-07 3:16

Two methods to create dialog

23-Aug-07 3:16

Iain Clarke wrote:
Have you tried looking on a well know site full of programming articles? Perhaps in the system section?

That's about as useful as suggesting to look in the phone book under "tire repair" when you get a flat tire on your car. It would be more comprehensive, and a lot less tiring, to call the first name in the As and ask them what to do.

"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

acerunner31622-Aug-07 10:35

acerunner316

22-Aug-07 10:35

Method 1:

CMyDialog mMyDialog;
mMyDialog.Create(CMyDialog::IDD, this);

Method 2:

CMyDialog* mptrMyDialog;
mptrMyDialog = new CMyDialog;
mptrMyDialog -> Create(CMyDialog::IDD, this);

In method 2, I have to call delete mptrMyDialog before closing, but in method 1, mMyDialog will be destroyed when its parent is closed, correct?

So why is method 2 generally the preferred way? Method 1 seems to me like the simpler way because you don't have to worry about deallocating.

David Crow22-Aug-07 10:57

22-Aug-07 10:57

acerunner316 wrote:
So why is method 2 generally the preferred way?

It all depends on the individual (and where they may have copied their code from).

"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

Mark Salsbery22-Aug-07 12:02

Mark Salsbery

22-Aug-07 12:02

acerunner316 wrote:
in method 1, mMyDialog will be destroyed when its parent is closed, correct?

The windows object (HWND) will be destroyed when the parent is destroyed.
The CMyDialog object is destroyed when it goes out of scope. If it goes out of
scope while its wrapped HWND is valid, the Windows object (HWND) will be destroyed
as well.

I suppose which method you use (in addition to DavidCrow's reply) depends on the
desired scope of the object and/or whether you want it on the stack or the heap.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

toxcct22-Aug-07 21:27

toxcct

22-Aug-07 21:27

acerunner316 wrote:
In method 2, I have to call delete mptrMyDialog before closing

wrong. after !!!
otherwise, you delete a dialog still being displayed !

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Russell^'22-Aug-07 22:23

Russell^'

22-Aug-07 22:23

acerunner316 wrote:
So why is method 2 generally the preferred way?

I never heared this before D'Oh! | :doh:

... the 2 methods are exactly the same for me.

The only difference that I can see is that using pointers you can pass the pointer from function to function, or, in a class, you can store the dialog pointer on a member variable of that class. Sniff | :^)

Russell

VC++,CClientDC and OnDraw's CDC

Roger Broomfield22-Aug-07 22:33

Roger Broomfield

22-Aug-07 22:33

method 2 is preferred because the purpose of Create is to create a modeless dialog

so imagine you have this function somewhere

<br />
void OpenMyModelessDialog()<br />
{<br />
CMyDialog mMyDialog;<br />
mMyDialog.Create(CMyDialog::IDD, this);<br />
}<br />

as soon as the function returns the modeless dialog will be destroyed OOPS!!!

akira3222-Aug-07 7:36

akira32

22-Aug-07 7:36

VC++,CClientDC and OnDraw's CDC
What is the difference of drawing a geomtric shape in the CClientDC and OnDraw's CDC?

Re: VC++,CClientDC and OnDraw's CDC

Mark Salsbery22-Aug-07 7:51

Mark Salsbery

22-Aug-07 7:51

OnDraw's CDC is a CPaintDC - a DC obtained through the BeginPaint() API in response to WM_PAINT.
CClientDC is obtained with GetDC.

OnDraw's DC will have a clipping region selected into it which excludes areas outside the area that
needs repainting. With a CClientDC, you'd need to do that yourself.

They draw to the same place though Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Using MSXML APIs in C++ program

koumodaki22-Aug-07 7:23

koumodaki

22-Aug-07 7:23

I have a C++ Program which in which I have to read a XML file contents. The code is

#include "fstream.h"
#include "string.h"
#import "msxml2.dll" named_guids raw_interfaces_only

using namespace MSXML2;
using namespace std;
void main()
{
IXMLDOMDocumentPtr m_pXmlDoc;
IXMLDOMNodePtr m_pProductNode;
HRESULT hr = m_pXmlDoc.CreateInstance(MSXML2::CLSID_DOMDocument);
_variant_t vtFileName("my_xml.xml");
VARIANT_BOOL vtRetVal;
m_pXmlDoc->load(vtFileName,&vtRetVal);
}
The CreateInstance() call fails and m_pXmlDoc is NULL.
Why am I not getting the instance? What is wrong in this piece of code?

Re: Using MSXML APIs in C++ program

David Crow22-Aug-07 7:30