C / C++ / MFC Discussion Boards

Re: service problem!!!

tank102510-Apr-04 0:05

tank1025

10-Apr-04 0:05

then what should i do?

Maximize dialog based app on startup

pma9-Apr-04 23:15

pma

9-Apr-04 23:15

Hi,

I need a proper way of keeping a window maximized all the time.
On startup its quite easy, I just call:
ShowWindow(SW_SHOWMAXIMIZED);

But the problem is if the user minimizes the window and then
reopens it, then it wont be maximized again.

Thank you for your help
Mario

Re: Maximize dialog based app on startup

Prakash Nadar9-Apr-04 23:35

Prakash Nadar

9-Apr-04 23:35

in the oninitdialog resize the window using setwindowpos(...).

Re: Maximize dialog based app on startup

ThatsAlok9-Apr-04 23:36

ThatsAlok

9-Apr-04 23:36

ok
you can use following code buddy

add window handller WM_SIZE ok

void OnSize( UINT nType, int cx, int cy ){

if(nType==SIZE_MINIMIZED)
{
}else
{
this->ShowWindow(SW_SHOW_MAXIMIZED);

}
}

ok that very simple Smile | :)

Alok Gupta
visit me at http://alok.stormpages.com

Find The type of Internet Connection....

swarnamanoo9-Apr-04 23:10

swarnamanoo

9-Apr-04 23:10

Hi all...
How can i know the type of Internet connection such as ISDN,Direct connection or 56.6kbps modem etc used by a client.

Problem accessing one class from another and vice versa

Iceberg769-Apr-04 20:34

Iceberg76

9-Apr-04 20:34

Hello,

I am writing a application in Visual C++ .NET 7.0. I'd like to keep my classes in seperate files to keep things organized, but I am having difficulty accessing classes from within two files. Can someone help me find a solution accessing between files in this manner? I need to access methods and data back and forth in this manner, but I don't want the two classes to be in the same file. What am I doing wrong? Is there a different way to do this?

Here is a simplified version:

Class1.h

#ifndef __Class1H__
#define __Class1H__

#include "Class2.h"

class Class1
{
public:
Class1();
~Class1();
//This doesn't work because it is in a different file!
Class1(Class2* object);
//This doesn't work because it is in a different file!
Class2 obj;

};
#endif // __Class1H__

Class2.h

#ifndef __Class2H__
#define __Class2H__

//this is causing problems...
#include "Class1.h"

class Class2
{
public:
Class2();
~Class2();

};
#endif // __Class2H__

Class1.cpp

#include "Class1.h"

Class1::Class1()
{

}

Class1::~Class1()
{

}

Class2.cpp

#include "Class2.h"

Class2::Class2()
{

}

Class2::~Class2()
{

}

Re: Problem accessing one class from another and vice versa

toxcct9-Apr-04 21:39

toxcct

9-Apr-04 21:39

first, why do you call #include "Class1.h" into Class2.h when Class2 dont use any object from Classe 1 ??

So, do this :

Class1.h
<font style="color:blue;">#include</font> <font style="color:gray;">"Class2.h"</font>;
 
<font style="color:blue;">class</font> Class1;
<font style="color:blue;">class</font> Class1 {
     Class2 MyClass2Object;
     <font style="color:green;">//...</font>
}
 
Class2.h
<font style="color:blue;">class</font> Class2;
<font style="color:blue;">class</font> Class2 {
     <font style="color:green;">//...</font>
}

there won't have any recursive call problem anymore...

i forgot to say, don't put the data members into public: statement... prefer this for the interface (member functions which are allowed for the users).

TOXCCT >>> GEII power

Re: Problem accessing one class from another and vice versa

toxcct9-Apr-04 21:51

toxcct

9-Apr-04 21:51

oh, i see another problem...

each header file must be "included" once into the project. for that, you must use preprocessor directive to exclude recursive redifinitions :

Class1.h
<font style="color:blue;">#if</font> !<font style="color:blue;">defined</font>(__CLASS1_H_INCLUDED__)
<font style="color:blue;">#define</font>      __CLASS1_H_INCLUDED__
 
<font style="color:green;">//...</font>
 
<font style="color:blue;">#endif</font><font style="color:green;">//__CLASS1_H_INCLUDED__</font>
 
 
Class2.h
<font style="color:blue;">#if</font> !<font style="color:blue;">defined</font>(__CLASS2_H_INCLUDED__)
<font style="color:blue;">#define</font>      __CLASS2_H_INCLUDED__
 
<font style="color:green;">//...</font>
 
<font style="color:blue;">#endif</font><font style="color:green;">//__CLASS2_H_INCLUDED__</font>

that concern only .h files. don't forget !

TOXCCT >>> GEII power

Clipboard copy

Member 60749-Apr-04 20:32

Member 6074

9-Apr-04 20:32

sir,

I need a code to get a selected text from any window to the clipboard and I would like to know how windows implements cltr+c for copying a selected text from any window.

Re: Clipboard copy

ThatsAlok9-Apr-04 23:43

ThatsAlok

9-Apr-04 23:43

//copy
CString str="alok"
if (::OpenClipboard(AfxGetApp()->m_pMainWnd->GetSafeHwnd())) {
if(::EmptyClipboard()) {
if (::SetClipboardData(CF_TEXT,str) == NULL ) {
AfxMessageBox( "Unable to set Clipboard data" );
} } }
CloseClipboard();

//paste
CString str;
if (OpenClipboard()) str=GetClipboardData(CF_TEXT);
CloseClipboard();

that willl help you lot Rose | [Rose]

Alok Gupta
visit me at http://alok.stormpages.com

Formating output file

picasso29-Apr-04 19:28

picasso2

9-Apr-04 19:28

Have a txt file that looks like this
2345
5332
4433
4343
5555
6666
....

Want to read and write it to another text file like this (3 columns)

2345 5332 4433
4343 5555 6666
using c++ (non MFC)

any help will be greatly appreciated

Re: Formating output file

Prakash Nadar9-Apr-04 19:51

Prakash Nadar

9-Apr-04 19:51

openinfile();
openoutfile();

int i = 0;
while(!endoffile)
{
  readfrominfile;
  writetooutfile;
  i++;
  if(i==3)
  {
      write '\n' to out file;
      i = 0;
  }
}

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

Active Window?

David Horner9-Apr-04 18:54

David Horner

9-Apr-04 18:54

Hi,
I'm interested in writing a program that must keep track of the current active window.
I would like to get messages from the OS that tells me when the user switches from app to app.
What is the best way to do this?

Should I use a WM_TIMER and just check what process the current active window belongs to?
(actually, I don't know exactly what function I should use to find the current active window and process)
Or is there a way to hook into something that would notify me on changes?

Samples, comments would be wonderful!

Thanks,
Dave

Re: Active Window?

wuxianzhong9-Apr-04 21:26

wuxianzhong

9-Apr-04 21:26

To use SetWindowsHookEx() to get it!

when to use "AFX_IDP_COMMAND_FAILURE"?

vividtang9-Apr-04 18:03

vividtang

9-Apr-04 18:03

what are those commands whose type is similar to "AFX_IDP_COMMAND_FAILURE"?
When to use it?

PostMessage

sschilachi9-Apr-04 13:32

sschilachi

9-Apr-04 13:32

I have a function that responds to a message by incrementing a counter variable by 1:

OnAction(WPARAM wParam, LPARAM lParam)<br />
{<br />
m_nCounter += 1;<br />
}

The message that it responds to is posted twice using PostMessage, once immediately after the other (like so):

::PostMessage(GetSafeHwnd(),WM_ACTION,0,0);<br />
::PostMessage(GetSafeHwnd(),WM_ACTION,0,0);<br />

The strange thing is that if i modify the function to display a MessageBox with the value of the counter (like so):

OnAction(WPARAM wParam, LPARAM lParam)<br />
{<br />
CString string;<br />
m_nCounter += 1;<br />
string.Format("%d",m_nCounter);<br />
MessageBox(string);<br />
}

I get two message boxes, as I should; however the values in the message boxes are 2 then 1, not 1 then 2.

Howcome I am receiving 2 then 1, rather than 1 then 2 from the message boxes as you would expect?

Any help would be greatly appreciated.

Thanks

Re: PostMessage

Prakash Nadar9-Apr-04 15:13

Prakash Nadar

9-Apr-04 15:13

both the message box comes on together?

as far as i know, message boxes in certain events could be very tough way of debuging the app coz the message boxes starts pumping the messages, so other messages too gets executed.

try TRACE instead.

MSN Messenger.
prakashnadar@msn.com

"If history isn't good, just burn it." - Sidhuism.

Re: PostMessage

Empty198110-Apr-04 1:19

Empty1981

10-Apr-04 1:19

::SendMessage(GetSafeHwnd(),WM_ACTION,0,0);
::SendMessage(GetSafeHwnd(),WM_ACTION,0,0);
<made in="" china="">
if you want to get the result as you say,you should write like these.
when we use postmessage to send the message,the application
only send the message to CWnd,then return,the application does not
wait for the Command to be carried out.
when we use sendmessage to send the message,the appliation return
when the command be carried out.If we does not wait for the command
to be carried out.The message will be save in the message queue,
so the message is FILO,not FIFO
zhengyb@nanjing-fnst.com

EXE Header Info?

Timothy Grabrian9-Apr-04 12:46

Timothy Grabrian

9-Apr-04 12:46

I want to write something like the Sub7 Configure program, where it overwrites some of the values already in the seperate exe.

I've tried changing some of the constant data in the program and saving it but it doesn't work. I think it's because I need to change some of the info in the EXE header.

My problem is that I downloaded a EXE Header info checker and checked a program I made, them I changed some stuff in that program and checked it again and it was all the same!

Any ideas on how I can change what's already in the exe?

P.S. I don't want to use String Table Resources either.

wWw.KruncherInc.cOm - My cool programs

Splitting an Integer into 4 Bytes

sschilachi9-Apr-04 12:16

sschilachi

9-Apr-04 12:16

how do you split an integer variable into 4 byte variables, I'm looking for a function to achieve this.

int i;<br />
byte b1,b2,b3,b4;<br />
<br />
b1 = Byte1(i);<br />
b2 = Byte2(i);<br />
b3 = Byte3(i);<br />
b4 = Byte4(i);

Can anyone help?

Thanks

Re: Splitting an Integer into 4 Bytes

PJ Arends9-Apr-04 12:41

PJ Arends

9-Apr-04 12:41

Many way to do this.

One brute force way is:

b1 = i & 0x000000ff;
b2 = (i & 0x0000ff00) >> 8;
b3 = (i & 0x00ff0000) >> 16;
b3 = (i & 0xff000000) >> 24;

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Splitting an Integer into 4 Bytes

Roman Nurik9-Apr-04 12:50

Roman Nurik

9-Apr-04 12:50

not a very safe-cast method but who cares it works:

<br />
int i = 12345;<br />
unsigned char byte1 = ((unsigned char*)&i)[0];<br />
unsigned char byte2 = ((unsigned char*)&i)[1];<br />
unsigned char byte3 = ((unsigned char*)&i)[2];<br />
unsigned char byte4 = ((unsigned char*)&i)[3];<br />

r -€

Re: Splitting an Integer into 4 Bytes

grigsoft9-Apr-04 21:46

grigsoft

9-Apr-04 21:46

I will add this one:
int i=12345;
BYTE* ab = (BYTE*)&i;
// use ab[0-3]

Igor Green
http://www.grigsoft.com/ - files and folders comparison tools

Re: Splitting an Integer into 4 Bytes

Prakash Nadar9-Apr-04 22:00

Prakash Nadar

9-Apr-04 22:00

assume i is 2 bytes for simplicity.

int i = 0x1234;
byte c1,c2,

then according to your logic, the output would be like this.
c1 = 0x34; and
c2 = 0x12;
which is wrong.This is because the way it is stored in the memory. and if you consider for 32bit integer value, the error would just double.

and according to PJ
c1 = 0x12; &
c2 = 0x34;
here the output is correct,

hope you got the picture now.

Running my application when Windows starts

Anonymous9-Apr-04 10:56

Anonymous

9-Apr-04 10:56

Where should I place my exe so that it starts running when Windows starts

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