C / C++ / MFC Discussion Boards

vc-programmer-15-Nov-04 22:49

15-Nov-04 22:49

following code is table open.

//myado.h
_ConnectionPtr m_pConnection;
_RecordsetPtr m_pRecordSet;

//myado.cpp
m_pRecordSet1->Open
("EntryDateTime",variant_t((IDispatch*)
m_pConnection,true),adOpenKeyset,
adLockOptimistic,adCmdTable);

if recordset open using select statement(eg:select * from EntryDateTime where pno=1) ,how i do ???
pls explain me...

find pid for an open tcp connection in Windows 2000

Anonymous15-Nov-04 22:27

Anonymous

15-Nov-04 22:27

i would like to know how to progamatically find the process ID for an TCP connection on a WIN2K system. Windows XP uses AllocateAndGetTcpExTableFromStack() for that purpose but this function call is undefined in Win2K.

But programs like tcpview, activeport is able to find the pid in Win2K also...
Does any1 know how to do it?
Thanx in advance...

Dialog Variable can not be assigned

Jens Lüddecke15-Nov-04 22:16

Jens Lüddecke

15-Nov-04 22:16

Hello!
I have got the following problem!

Ich have written a Dll for a Socket Connection. This Dll call a callback function when it receives a Msg over the net.
The function which is called from the dll is a global function in my Testapplication. The global function calls my receive function which only copys the msg in two Membervariablen from the Dialog. These Membervariablen are undefined (Debug shows: ???) and the program crashs.

Global receive function
void gReceiveMsg(CMsg *pMsg)
{
((CSocketTesterApp*)AfxGetApp())->CallbackReceiveMsg(pMsg);
}

function in my application (the values are received correct )
void CSocketTesterApp::CallbackReceiveMsg(CMsg *pMsg)
{
CString sVar = "";
double nVal =0;
pMsg->GetData(&sVar,&nVal);
((CSocketTesterDlg*)AfxGetMainWnd())->ReceiveMsg(sVar,nVal);
}

receive function in my Dialog
void CSocketTesterDlg::ReceiveMsg(CString sVariable, double nValue)
{
m_sRecVariable = sVariable;
m_nRecValue = nValue;
UpdateData(FALSE);
}

The Program crashs after the assignment to the membervariable.
I hope someone can help me!!!

king regards

Jens Lüddecke

Multiple selection in CTreeCtrl possible… ?

anderslundsgard15-Nov-04 21:46

anderslundsgard

15-Nov-04 21:46

I’m using a CTreeCtrl to display an hierarch structure of a database. Is it possible to allow the user to select multiple items using for e.g. “shift” and “ctrl”?

Thanks / Anders

_____________________________

...and justice for all

APe

Re: Multiple selection in CTreeCtrl possible… ?

Maximilien16-Nov-04 2:23

Maximilien

16-Nov-04 2:23

I don't think it's in the standard CTreeCtrl behaviour; google for CMultiTree it handles multiselection.

Maximilien Lincourt
Your Head A Splode - Strong Bad

How to Hide the MFC Opening Dialog Box when open the Application.?

pubududilena15-Nov-04 21:35

pubududilena

15-Nov-04 21:35

hi,
I want to hide the opening MFC Dialog ,when open the Application.
How do I do that?
If any one know this please reply..
Thanks in advance.

Re: How to Hide the MFC Opening Dialog Box when open the Application.?

Selvam R16-Nov-04 2:21

Selvam R

16-Nov-04 2:21

Hi,

Try ShowWindow(SW_HIDE).

With Regards,
Selvam

Re: How to Hide the MFC Opening Dialog Box when open the Application.?

ThatsAlok16-Nov-04 2:32

ThatsAlok

16-Nov-04 2:32

Hain Buddy,
This Trick is provided with courtesy From Nishant S

Overide WM_WINDOWPOSCHANGED Message then Use Mr Selvam technique of

this->ShowWindow(SW_HIDE);

or Visit http://www.voidnish.com for more detail about this

-----------------------------
"I Think It Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: How to Hide the MFC Opening Dialog Box when open the Application.?

David Crow16-Nov-04 2:54

David Crow

16-Nov-04 2:54

pubududilena wrote:
I want to hide the opening MFC Dialog ,when open the Application

What "opening MFC Dialog" are you referring to?

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

using LBS_MULTIPLELSEL

V.G15-Nov-04 21:15

V.G

15-Nov-04 21:15

hi!
i wanted to add multiple items toa list box, and tried using LBS_MULTIPLELSEL. Yet only one item is added. how do i do it? -V.G?

Re: using LBS_MULTIPLELSEL

pubududilena15-Nov-04 22:03

pubududilena

15-Nov-04 22:03

hi,
If u are doing this using Visual C++/MFC ,It is very easy to set Multiple selection to the ListBox.
Go the properties of the added List Box change the selection to 'Multiple'.
That's all.

Re: using LBS_MULTIPLELSEL

David Crow16-Nov-04 2:56

David Crow

16-Nov-04 2:56

V.G wrote:
how do i do it?

Like this:

m_listbox.AddString("Item 1");
m_listbox.AddString("Item 2");
...
m_listbox.AddString("Item N");

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

Re: using LBS_MULTIPLELSEL

V.G16-Nov-04 3:40

V.G

16-Nov-04 3:40

yes.. but how do i retrieve all the selected items.. i mean even though i select the items and store them in a buffer, only one item is added if i use AddString()

Re: using LBS_MULTIPLELSEL

David Crow16-Nov-04 3:56

David Crow

16-Nov-04 3:56

V.G wrote:
but how do i retrieve all the selected items

By using GetSelItems().

V.G wrote:
...only one item is added if i use AddString()

How many times are you calling this function?

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

WM_CTLCOLORLISTBOX

V.G15-Nov-04 21:11

V.G

15-Nov-04 21:11

HI!
i wanted to color a listbox, tried using WM_CTLCOLORLISTBOX as follows:

case WM_CTLCOLORLISTBOX:
{

SetBkColor((HDC)wParam,RGB(255,0,0));
return (LRESULT)hstaticbr;
break;

}
but it dosen't work. Please help me! -V.G

Re: WM_CTLCOLORLISTBOX

pubududilena15-Nov-04 21:40

pubududilena

15-Nov-04 21:40

hi you can get more details using this:
http://www.codeguru.com/Cpp/controls/editctrl/backgroundcolor/article.php/c3929/[^]

Algorithm for generating Alphanumeric characters

Mythri.B.L15-Nov-04 20:40

Mythri.B.L

15-Nov-04 20:40

Hello,

I would like to know if anyone can help me out in generating an algorithm which gives alphanumeric characters.

Regards,
Mythri

Re: Algorithm for generating Alphanumeric characters

DaFrawg15-Nov-04 20:50

DaFrawg

15-Nov-04 20:50

That doesn't make sense...

Give an example of what you want. Do you want a random alphanumeric character? Or does this have to do with Keyboard Input?

Re: Algorithm for generating Alphanumeric characters

David Crow16-Nov-04 3:00

David Crow

16-Nov-04 3:00

Something like:

char RandomNumber( void )
{
    return (rand() % 10) + 48;
}
 
char RandomUpper( void )
{
    return (rand() % 26) + 65;
}
 
char RandomLower( void )
{
    return (rand() % 26) + 97;
}

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

DDK

snthomas15-Nov-04 20:01

snthomas

15-Nov-04 20:01

what is DDK. From whre could i get it.I have to develop a device driver.
pls help

Re: DDK

DaFrawg15-Nov-04 20:34

DaFrawg

15-Nov-04 20:34

That would cost you about $200. I don't think the DDK itself is downloadable without a MSDN subscription. The DDK reference however is available for everyone, like the content of the MSDN CDs.

I was also looking for the DDK to make a device driver for a virtual webcam, but I don't have any tools either to make device drivers.

about floating keyboard

Tripura.K15-Nov-04 18:11

Tripura.K

15-Nov-04 18:11

Hello ,
I have a ownerdraw button on a dialog box which is created in an SDI application where buttons are members of dialog class and when evet i click the button i want the keyboard key event to be generated and that caracter should be displayed on the client area what should i do in sent message for this
for example if i have A on my button when ever user clicks that button keyboards keyevent should generate and that should be passed and displayed on editview area
i have a the function
void MyDialog::OnButton49()
{
/* unsigned char arr[256];
int i= GetKeyboardType(1);
GetKeyboardState(arr);
GetKeyNameText(49,"a",1);
//GetKeyboardLayoutList(
GetLastError();*/
// this->GetParent()->SendMessage(WM_PAINT,nRepCnt,nFlags);
//SetKeyboardState(;
//Get
// int i=GetKeyState(49);
// if(i==1)
GetParent()->SendMessage(WM_CAPTURECHANGED,49,1);

//n_butFlag=49;
}
like this for displaying 'a' on in my dialog class

Request to all to continue this

Re: about floating keyboard

DaFrawg15-Nov-04 20:48

DaFrawg

15-Nov-04 20:48

Take a look at MSDN - Keyboard Input[^]. There you can find messages you can pass to the window
that must think that someone pressed that specific key on the keyboard. You can send WM_KEYDOWN or WM_SYSKEYDOWN when the button is pressed, and WM_KEYUP or WM_SYSKEYUP when the button is released.

For instance, you could do

void MyDialog::OnButton49() 
{
GetParent()->SendMessage(WM_CAPTURECHANGED,49,1);
GetParent()->SendMessage(WM_KEYDOWN, VK_A, NULL);
GetParent()->SendMessage(WM_KEYUP, VK_A, NULL);
}

I'm not sure about those VK_A (I'm at school now and I don't know the Virtual Key list by heart). You can also replace those NULLs by control codes that indicate if CTRL or AltGrp is pressed in addition.

By the way, don't include too much commented lines. It looks nasty and it makes it unreadable. There is also a way to use one single function for all buttons (with a custom WindowProc), so that you don't have to make a function for each button on your virtual keyboard.

Handling Files in Visual C++

shanil8015-Nov-04 18:09

shanil80

15-Nov-04 18:09

I have a file in which data is entered in the below format

[KEYS/90]
CAPKLEN = 512;
CAPKEXP = 03 ;
CAPKMOD = C26B3CB3833E42D8270DC10C8999B2DA18106838650DA0DBF154EFD51100AD144741B2A87D6881F8630E3348DEA3F78038E9B21A697EB2A6716D32CBF26086F1 ;
SHA = B3AE2BC3CAFC05EEEFAA46A2A47ED51DE679F823

I need to create an application in VC++ so that the user who is unaware of this format will be able to enter data in to the file.

The Application requirement is that the user should be able to select one of the keys using a selection box.once the the key section is selected the corresponding fields will be dispalyed along with the original data and also the user will get an option for entering the new data.for eg:

the user selects section key/90 then the screen should display
CAPKLEN
CAPKEXP
CAPKMOD
then the user selects CAPKLEN and it's original value will be displayed along with an option for new value.

I hope the requirement is clear for you.if you have any doubts you can ask me.My PL needs this work to be finished very soon and i don't have much exposure in VC++.so i request you to please help me in this regard or please let me know where i can get some info on this.

Re: Handling Files in Visual C++

shiraztk15-Nov-04 23:57

shiraztk

15-Nov-04 23:57

Hi
From what I understand I feel its very easy task.
All you need to know is how to read and write from a file and display those values, right ?
For this what I suggest is some thing like this.
The file should be as [length in byte][data].

Hope this would help..

regards

The Best Relligion is Science.
Once you understand it, you will know God.

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