Re: WM_SHUTDOWN notification Win32 dll - C / C++ / MFC Discussion Boards

GDavy23-Nov-04 23:07

23-Nov-04 23:07

I`ve got kind off a complex situation here.
I have a class hierarchy that looks like

class A
class aB:public A
class aC:public A
class cD:public C
with further derived classes, but for illustrating this`ll do.
in class A I define some constants like

#define CONST_A_1 1
#define CONST_A_2 2
...

if class aB needs to I should be able to define a series of constants there that continues where the series of #defines in class A stopped.
e.g. if last const in class A was #define CONST_A_X x (where x is a number)
then CONST_aB_1 should get value x+1.
Ok this is easy I could just define in class A #define CONST_A_LAST CONST_A_X
and set the definitions in class aB like

#define CONST_aB_1 (CONST_A_LAST+1)
#define CONST_aB_2 (CONST_aB_1+1)
...

Now imagine that the constants defined in A are good enough for aC(no extra needed), but I need some more for cD...
I could define them in cD as i did in aB like #define CONST_cD_1 (CONST_A_LAST+1) and so on, but what if due to specifications I don^t have yet I will need to define a constant in aC later on? Then I will need to change the defines in class cD too (at least the first one,because I don^t want a constant with the same value in base-class)....
From the start I could define in aC something like #define CONST_C_LAST CONST_A_LAST
and use that CONST_C_LAST as a starting point in cD.

However I don^t like the above approach( although it might be the only one??)
The thing is each time I would derive a new class from one of these classes I would need to remember to define a new "CONST_..._LAST" constant (in case that I derive a class from that class and need to specify a new const).Which might lead to a lot of unused defined constants (doesn^t hurt, but I don^t li

Does anybody know how I could solve this issue here in such a way that I can remove/add new constants to a class without needing to worry about derived classes of that class. Or derive classes without having to remember adding a CONST_..._LAST if I don^t need it for that class, but still be able to derive a new class from that one and start with a correct constant without bothering base class, and in case base class suddenly needs a constant adding it there without bothering derived class.

I know sounds like a lot to ask for. But someone might know a solution....
Thanks for any insight you might provide.
Greets,
Davy

CString to a int?

Larsson23-Nov-04 22:55

Larsson

23-Nov-04 22:55

How can I make a CString to a int?

I have a CString with numbers let's say 30 and I need to count down that so I get to zero. I cant use a int to start with it need to be a CString. But I need to convert that CString to a int? But how can I do that?

Re: CString to a int?

Yuvaraj N23-Nov-04 22:59

Yuvaraj N

23-Nov-04 22:59

use _ttoi() function

Yuvaraj N

Re: CString to a int?

Larsson23-Nov-04 23:01

Larsson

23-Nov-04 23:01

Ok but how do I set up this?

Re: CString to a int?

Yuvaraj N23-Nov-04 23:10

Yuvaraj N

23-Nov-04 23:10

Supps

CString ValueString=_T("30");
then
int Value=_ttoi(ValueString);

Yuvaraj N

Re: CString to a int?

V.23-Nov-04 23:53

23-Nov-04 23:53

int yourint = atoi(yourcstring);
ms-help://MS.VSCC/MS.MSDNQTR.2003FEB.1033/wcecrt/htm/_wcecrt_atof_atoi_atoi64_atol.htm[^]

good luck.

"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix

Re: CString to a int?

toxcct24-Nov-04 8:17

toxcct

24-Nov-04 8:17

CString str = "32";
int i;
sscanf((LPCTSTR)str, "%d", &i);

TOXCCT >>> GEII power
[VisualCalc]

Re: WM_SHUTDOWN notification Win32 dll

geo_m23-Nov-04 22:45

geo_m

23-Nov-04 22:45

It can be a solution for all platforms, only you have to create a normal window - not message only - a bit more overhead, but should work.
If you want to receive a message, you need a window (WM_ stands for Window Message Poke tongue | ;-P

) for window you need a message pump...

Or might be there will be a better way how to detect the windows shutdown, but I don't know them from the head now.

GIF in dialogue box?

max_gundam1523-Nov-04 22:37

max_gundam15

23-Nov-04 22:37

Can I add active GIF onto a dialogue box under Visual C++6.0? Using Window OS from Win98, Win98SE, Win2000 and WinXP. OMG | :OMG:

On Visual C++ 6.0, how to I identify a user who is having what kind of privileges? (i.e admin privilege, etc)

working of up and down arrows

Anonymous23-Nov-04 22:28

Anonymous

23-Nov-04 22:28

hello all,
cau any one tell me, in VC++ what messege do i need to send in the button function so that when ever the user clicks the button on the dialog box which is created in an SDI application, the cursor moves up in the client area , where my button is member dialog class and object of button class
void MyDialog::OnButtonup()
{
short caps=GetKeyState(20);
BYTE keyState[256];
GetKeyboardState((LPBYTE)&keyState);
if( (TRUE && !(keyState[38] & 1))||(!FALSE && (keyState[38] & 1)) )
{
// Simulate a key press
keybd_event( 38,0x45,KEYEVENTF_EXTENDEDKEY|0,0);
// Simulate a key release
keybd_event(38,0x45,KEYEVENTF_EXTENDEDKEY|KEYEVENTF_KEYUP,0);
}
}
but this code dos't compelete my requirement

How to overwrite ID_APP_EXIT function ?

ledallam23-Nov-04 22:23

ledallam

23-Nov-04 22:23

Hi,

I am working with MDI application. I want to ovverwrite ID_APP_EXIT, File->Exit menu function of Mainframe menu. When I click on this menu option or on the close icon button of Main frame, I should check for a particular condition and then allow to exit the application if condition is true or else I should not allow the user to exit.

I am able to overwrite and check the condition, but unable to close the application if condition is met. If I used PostQuitMessage(0), it's getting closed but I'm getting lot of memory leaks due to this function.

Can anyone please help me to do this?

Thanks
Madhavi

Re: How to overwrite ID_APP_EXIT function ?

Jack Puppy24-Nov-04 1:05

Jack Puppy

24-Nov-04 1:05

Try

AfxGetMainWnd()->PostMessage(WM_CLOSE);

Pssst. You see that little light on your monitor? That's actually a government installed spy camera. Smile and wave to big brother!

Add-in development VC++ .NET 2003

Robert Bielik23-Nov-04 22:13

Robert Bielik

23-Nov-04 22:13

Everywhere it says: "Create project by going to Other Projects/Extensibility Projects". I don't have that! OTOH I don't have the Pro version of VC++. Is that needed ? I've download the VSIP 2003 SDK, that don't help either Frown | :(

/Rob

Re: Add-in development VC++ .NET 2003

toxcct23-Nov-04 22:35

toxcct

23-Nov-04 22:35

File > New... > 'project'

Confused | :confused:

TOXCCT >>> GEII power
[VisualCalc]

Re: Add-in development VC++ .NET 2003

Robert Bielik23-Nov-04 22:36

Robert Bielik

23-Nov-04 22:36

Thanks, but... that was what I said. There are no "Extensibility Projects" and thus no Add-in wizard Wink | ;)

Re: Add-in development VC++ .NET 2003

toxcct23-Nov-04 22:39

toxcct

23-Nov-04 22:39

i use VS pro and i never see this either Unsure | :~

sorry

TOXCCT >>> GEII power
[VisualCalc]

Drawing on screen

Atlence23-Nov-04 22:11

Atlence

23-Nov-04 22:11

Hi!

I need to draw some information on screen, without having to create a window. Here my code:

<br />
	CWnd* pDesktop=GetDesktopWindow();<br />
	CDC* pDC=pDesktop->GetDC();<br />
	CBrush* pOldBrush=(CBrush*) pDC->SelectStockObject(BLACK_BRUSH);<br />
	CPen* pOldPen=(CPen*) pDC->SelectStockObject(NULL_PEN);<br />
	pDC->Rectangle(0,0,100,100);<br />
	pDC->SelectObject(pOldBrush);<br />
	pDC->SelectObject(pOldPen);<br />
	pDesktop->ReleaseDC(pDC);<br />

This code is not working, nothing appears on screen!

What's wrong? Do I need to create a transparent window and draw on this window?

Thks in advance!
Appstmd
http://www.atlence.com

Where to start when programming MSN Messanger.

anderslundsgard23-Nov-04 22:08

anderslundsgard

23-Nov-04 22:08

Hi. I’m a VC++ programmer that have plans to use some functionalities from MSN Messenger into my programs.

I need some kind of tutorial on how to start… I’ve earlier coded against MS Outlook and MS PowerPoint so think I could get most things quite fast.

Really need some tips on where to start!

_____________________________

...and justice for all

APe

Copy a file (That is already in use)

Monty²23-Nov-04 22:00

Monty²

23-Nov-04 22:00

How can i copy a system file that is already in use
CopyFile fails with error GetLastError -> 32

i am tring to copy SAM,SOFTWARE...(Registry) files in XP

i have an application that backs up registry and it is copying all files to a folder
do i need some security tokens to copy these files

please help

C makes it easy to shoot yourself in the foot; C++ makes it harder, but when you do, it blows away your whole leg

mcsd in vc++

xcavin23-Nov-04 21:32

xcavin

23-Nov-04 21:32

Any good suggestion or links for taking MCSD Exams for VC++ ?

CListView Problem

Neelesh K J Jain23-Nov-04 21:22

Neelesh K J Jain

23-Nov-04 21:22

Hello Friends,
I am having CListView in which I am displaying some image and underneath them I having some text. The Main problem is that whenever the text is not having sufficient space then its displaying ... and when I select the text gets wrapped to the next line.

Please give me a solution for not displaying the three dots(...) and the text should be displayed on the next line.

Thank you in advance.

Neelesh K J Jain.

Re: CListView Problem

Mike Danberg24-Nov-04 11:47

Mike Danberg

24-Nov-04 11:47

Hi,

While I've never done anything with images and text in a ListView I have an idea that might help you. This is the same thing that happens if you look in any folder and the name is too long. The obvious reason you get the "..." is because displaying the full name could overlap with an image below the text. Each row has a certain height to it and if the text goes beyond the height it gets truncated. At least that's how I see it. So my idea is for you to manually override the row height and change it to make the text fit. I don't know if this definitely will work, but its worth a shot.

Edit: After messing around inside a folder, it seems that there usually is enough space to display most names without doing that. Maybe there is a property you can check to allow it to display?

Write to a fiel and read the same fiel in real time.

amitranjanmishra23-Nov-04 21:17

amitranjanmishra

23-Nov-04 21:17

HI ,
I wanna help on a simple application.

I have 2 applications in c language.

First application 'A' has some data being written in a text file 'T'.

Second Application 'B' simultaneously is reading that data from the same file 'T'(if any) and producing the desired output.

Can it b done n how.

amit mishra

Re: Write to a fiel and read the same fiel in real time.

toxcct23-Nov-04 22:10

toxcct

23-Nov-04 22:10

set a flag in the registry (or in a temporary text file).

this way, by testing the flag before writing or reading, you could know if you are allowed to (or not)...

prog1 :
if (!flag) {
    <font color=#0000FF>int</font> fd = fopen(<font color=#808080>"T"</font>);
    fprintf(<font color=#808080>"some datas to write"</font>);
    fclose(fd);
    flag = <font color=#0000FF>true</font>;
}

prog2 :
if (flag) {
    <font color=#0000FF>int</font> fd = fopen(<font color=#808080>"T"</font>);
    <font color=#0000FF>char</font> strTab[100];
    fscanf(<font color=#808080>"%s"</font>, strTab[0]);
    fclose(fd);
    flag = <font color=#0000FF>false</font>;
}

TOXCCT >>> GEII power
[VisualCalc]

Re: Write to a fiel and read the same fiel in real time.

Robert Bielik23-Nov-04 22:42

Robert Bielik

23-Nov-04 22:42

What you should do is lookup "Named Pipes". This is in essence exactly what you want to do. Do a search on SS_Log on Codeproject and you'll find the SS_Log_Server article that does exactly that.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.