C / C++ / MFC

Getting info from edit box into list box

24-Jun-03 4:43

This is a fairly ambiguous request. Can you provide a small code snippet that shows what you are doing, and what a "stream" is?

Re: Size of File

Valeria Bogdevich24-Jun-03 5:26

Valeria Bogdevich

24-Jun-03 5:26

;o)
Thanks, David.
I have solved the problem already.
I pass array of streams in function.
Managed C++ code:

[Serializable]
public __gc class MSGDATA
{
public:
    ...
    MemoryStream * attachStream __gc[];
};

C# code:

MSGDATA pMsgData = new MSGDATA;
pMsgData.attachStream = new MemoryStream[HOW_MANY_ATTACHMENTS];
for (int k=0; k < HOW_MANY_ATTACHMENTS; k++)
{					
    pMsgData.attachStream[k] = new MemoryStream();
    // read data to stream
}
SendMail(pMsgData);
// flush streams

Re: Size of File

Jonathan Craig24-Jun-03 5:24

Jonathan Craig

24-Jun-03 5:24

At the first of the stream you could add a header struct:

#define MAX_FILES 20 //Set to what you need.

struct StreamInfo
{
    int nNumberOfFiles;
    DWORD dwFileSizes[MAX_FILES];
};

When reading the stream the first sizeof(StreamInfo) bytes would be your structure.

Hope this helps... Smile | :)

Jonathan Craig
www.mcw-tech.com

Jay Hova24-Jun-03 2:55

24-Jun-03 2:55

Hi,

Still trying to get familiar with MFC, please bare with me Smile | :)

I have a program set up so that a user can enter information into a edit box/control. I want to take that information and have it go to a list box/control so to form a scrolling list.

Can someone help me do this? I can't seem to figure out how to go about this.

Thanks in advance for all your help.

David Crow24-Jun-03 3:51

24-Jun-03 3:51

m_edit.GetWindowText(str);
m_listbox.AddString(str);

Jay Hova24-Jun-03 7:16

24-Jun-03 7:16

Does this go for controls that are on two separate windows? Does doing this allow for the data to be sent over two different windows in the app?

thanks for your help!

David Crow24-Jun-03 7:27

24-Jun-03 7:27

Yes, if they "belong" to the same application. For example, if you had a view with some controls on it (e.g., listbox), and a modeless dialog atop that with an edit control, you could very easily take the contents of the edit control and post a message to the view instructing it to add the string to its listbox.

valikac24-Jun-03 7:32

valikac

24-Jun-03 7:32

One solution is messages. Send a message from the source window to the destination window.

Kuphryn

Jay Hova25-Jun-03 7:53

25-Jun-03 7:53

Thanks for all your help. Got the job done.

Spinner and edit control

Jay Hova24-Jun-03 2:51

Re: Spinner and edit control

24-Jun-03 2:51

Hi,

Just a general question about spinners.

How come the spinner works in the opposite direction, or at least seems to go against what seems natural? When I hit the up arrow it counts down and vice versa? Can I change that around? How do you format the edit box to allow numbers only? Set precision on the numbers? letters only?

David Crow24-Jun-03 3:53

Re: Spinner and edit control

24-Jun-03 3:53

Read the documentation for CSpinButtonCtrl::SetRange(). It'll tell you why and how to change the behavior.

RChin24-Jun-03 4:33

RChin

24-Jun-03 4:33

cheers for that. This has always been a pain for ages, but never bothered to figure out how to change the behaviour

"..Even my comments have bugs!"

Inspired by Toni78

Interaction with system

Still learning how to code24-Jun-03 2:06

Still learning how to code

24-Jun-03 2:06

My laptop (running Windows ME) has the ability to hibernate. However, hibernation seems to fail when certain programs are running (I suspect those that make use of system timers). I want to write a piece of code to automatically close a list of programs if they are running and then effectively cause the system to hibernate. I need some help on this - I suspect that I'll have to use something like EnumWindows() to see if the programs are running, but will this pick up those that have minimised windows, or those "dormant" in the taskbar ? Also, how do I issue the call to the system to hibernate ? Apologies for the naivity !!! Thanks in advance for any help offered ! (Using MSVC++ Ver 4.0 by the way !)

Doug

Re: Interaction with system

Neville Franks24-Jun-03 11:51

Neville Franks

24-Jun-03 11:51

Well I'd upgrade to WinXP if possible. ME is crap. I've never had a problem with Hibernate not working on XP.

If that isn't possible I'm sure you'll find articles here on CP which enumerate processes. Also look at sysinternals.com

There is a Win API for the Hibernate stuff. Do a search on MSDN http://msdn.microsoft.com/default.aspx[^]

You might have difficulties with such an old version of VC++!

Neville Franks, Author of ED for Windows. Free Trial at www.getsoft.com

How many Desktop can i create with CreateDesktop

Thomas Mathew24-Jun-03 1:53

Thomas Mathew

24-Jun-03 1:53

hi,
How many desktop can i create with CreateDesktop() API in VC++.Is there any restriction in numbers of desktop and How many WorkStation can i create in that m/c. I want the limitation for Desktop in one machine.

I have checked with my program it is only allowing 13 desktop, can i create more desktop, Can i have more than desktop 50 by creating different workstations or like that.if any body know more about this plz post reply
I also tried to create a WorkStation and bind Desktop to it then it allowed me the 80 desktop. But i need the specify number of desktop i can create
The error i get in both condition is Error:8 (Not enough storage is available to process this command. )

Regards,
Thomas

printer event

acatalfo24-Jun-03 1:47

acatalfo

24-Jun-03 1:47

Is there a system-generated event when a file is sent to print could someone include sample code ?
If I could use a system hook to listen for IRP_MJ_WRITE (Parallel Device)maybe? Any help would be appreciated.

Thanks
Anthony

Re: printer event

Duncan Edwards Jones24-Jun-03 2:07

Duncan Edwards Jones

24-Jun-03 2:07

Use FindFirstPrinterChangeNotification and related APIs - there's VB articles on my site that you should be able to change no bother

'--8<------------------------
Ex Datis:
Duncan Jones
Merrion Computing Ltd

ActiveX - Error 450 in Visual Basic

Ishwari24-Jun-03 1:47

Ishwari

24-Jun-03 1:47

Hi,

I have an ActiveX tested OK. Now I have added a method taking a BSTR and BOOL parameters and returning void. The VC Code compiled and registered correctly. I inserted this activex in VB and when I tried to call the newly added method it gives an error "Wrong number of arguments or invalid assignment error". I don't have any clue on why this error as the Object Browser shows the method signature correctly as declared. And also I am passing the same type of parameters. Can any of you help me to solve this issue?

Thanks in Advance,
Ishwari

Console app - how to "keep alive" ?

MrBean24-Jun-03 0:54

MrBean

24-Jun-03 0:54

I'm developing a Win32 console app in VC++ 6.0 where I have coded a edit box which works fine... however running my console app on Windows 98, my app affects the speed of the computer.

I have tracked the problem down to my "main input loop" where my app wait for the user to press a key.
The main loop (very simple!) looks something like this :

BOOL bOK=TRUE;
int cKey;
while (bOK)
{
    // Wait for keystroke...
    while (!_kbhit())
    {
      // Do nothing...
    }    

    // Getting the key...
    cKey = _getch();

    // Process the key here...
    // and so on and so on...
}

So my question is : is there a "proper" way to wait for a input chars in a console app which does not slow down Windows 9x ?

Please help, thanks Smile | :)

Rage24-Jun-03 1:13

Rage

24-Jun-03 1:13

I am not sure about what you mean with Win32 console app. Is it a Win32 application, or a console app ?

If you have the Win32 code, then just process the message loop and check for keyboard messages.

If not, I guess you can use getchar();.

~RaGE();

MrBean24-Jun-03 1:22

MrBean

24-Jun-03 1:22

As i wrote... It's a Win32 console app Smile | :)

Not a DOS app but a 32bit console application.

Edit : I tried to process the Windopw messages but since my console app does not have a Windows (HWND) handle, I can't do that ;(

Peter Weyzen24-Jun-03 10:52

Peter Weyzen

24-Jun-03 10:52

Do the sleep() call. I have console-app based servers -- we do the same thing of a kbhit/getch loop to look for the shutdown keystroke.

With a sleep(100) this thread bears no impact on the process.... Thread priority is not a good way to do this, since the crux of the problem is that your thread is always awake and always processing.

Threads should not be wasting process time when they don't need to.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
Santa Cruz Networks