C / C++ / MFC

Shog⁹9-Dec-02 21:59

Shog⁹

9-Dec-02 21:59

Check out this article:
http://www.codeproject.com/dialog/dlgboxtricks.asp[^]
There's a section on grabbing focus in it.

---

Shog⁹
This is my December
These are my snow covered dreams
This is me pretending
This is all I need...

Rage9-Dec-02 22:16

Rage

9-Dec-02 22:16

Shog9 wrote:
There's a section on grabbing focus in it

Brilliant, it works !!! Shog, I love you Heart | [heart]

(BTW, Big thanks to Nish also Wink | ;)

)

~RaGE();

Christian Graus9-Dec-02 22:00

Christian Graus

9-Dec-02 22:00

SetWindowPos has always worked for me, if it does not work I can only assume some code in the other window is bringing it down again.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

C# will attract all comers, where VB is for IT Journalists and managers - Michael P Butler 05-12-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Rage9-Dec-02 22:17

Rage

9-Dec-02 22:17

That's what I thought until today. Well, I'll keep a link on Nish's article, it might be useful ...

~RaGE();

COleControl problem

hdi99kf@syd.kth.se9-Dec-02 21:22

hdi99kf@syd.kth.se

9-Dec-02 21:22

Hello.

I'm writing an ActiveX control which was created by MFC ActiveX ControlWizard. I run the ActiveX control in Internet Explorer. I'm trying to obtain a pointer to the container to be able to change the html-page from the ActiveX control.

In the control class which is derived from COleControl I have to following code:

LPOLECLIENTSITE lpSite = GetClientSite();<br />
LPOLECONTAINER lpContainer; <br />
if(lpSite == NULL) AfxMessageBox("Click OK to crash..."); <br />
lpSite->GetContainer(&lpContainer);

The problem is that GetClientSite() returns NULL so the application crashes.

Any help is greatly appriciated. Thanks in advance.

/Charlie.

Non Printing Characters

John Bosko9-Dec-02 21:21

9-Dec-02 21:21

Hi,
I've got a code which is adding 2 non-printable characters at the end of the string, which is causing a lot of problem.
Can anyone help me in removing these 2 "funny" characters.
Here is the code

[CODE]
========================================
#include <winsock.h>
#include <windows.h>
#include <iostream.h>
#include <string>
#include <conio.h>

using std::string;

const char *yy;
int u,i;

string final = "<req><loginid>8888<reqtype>08<broadcast><messagetype>M<no>5359846<message>\n";

void main()
{
final.append("<date>02/10/2002 14:30:10\n");

yy=final.c_str();
u=strlen(yy);

for(i=0;i<=u;i++)
{
printf("%c %d\n",yy[i],yy[i]);
}

}
===========================================
[CODE]

Kindly help!!
Many Thanks,
John

Dominik Reichl9-Dec-02 22:47

Dominik Reichl

9-Dec-02 22:47

Hello,

simply replace

for(i=0;i<=u;i++)

by

for(i=0;i<u;i++)

So, remove the =.

Then the 2 "funny" characters should not occur.

Big Grin | :-D

-Dominik

John Bosko9-Dec-02 23:09

9-Dec-02 23:09

Hi Domnik,
I did that and its not removed the second character.
What comes towards the end is 10 and 0.
When I do a for(i=0;i

jhwurmbach9-Dec-02 23:23

jhwurmbach

9-Dec-02 23:23

You mean the number representation of the linefeed-character?
Well, you could count two less than the string-length (CR/LF), or you could introduce a filtering line, that does skip any LF characters. That way you would even skip internal CR/LF sequences.

"My opinions may have changed, but not the fact that I am right."
Found in the sig of Herbert Kaminski

jhwurmbach9-Dec-02 23:29

jhwurmbach

9-Dec-02 23:29

By the way: C++ like would be doing that with iterators. Its just as easy and less error prone. (see your index error dominic has shown)

"My opinions may have changed, but not the fact that I am right."
Found in the sig of Herbert Kaminski

Dominik Reichl10-Dec-02 2:33

Dominik Reichl

10-Dec-02 2:33

As jh pointed out, you have to change the u to
u=strlen(yy) - 2; when using CR/LF (\r\n)
and u=strlen(yy) - 1; when using LF only (only \n).

John Bosko10-Dec-02 18:36

10-Dec-02 18:36

Hi Dominik and Jh,
Yes, your suggestions worked out.
Apparently the problem still persists and I've got no clue why its happening..
What I am doing is just sending in some data to another server using a sendto(). The server program is written in Java.
But when I send it, the server gets it with some non-printing character (ASCII '0') in the begining and it's causing a problem.

Any suggestions, what could be going wrong?
Here's the sendto() code
[CODE]
========================================
e = sendto(sd,final.c_str(),final.length(),0,(struct sockaddr *)&saServer,sizeof(saServer));
========================================
[CODE]

Many Thanks,
John Cry | :((

John Bosko10-Dec-02 18:47

How to get the caller of a fuction?

10-Dec-02 18:47

Hi Dominik and Jh,
Just out of curiosity, can we do something like concatenating 2 strings? Something like this in sendto()?
========================
e = sendto(sd,"string1"+"string2",lenght(),0,(struct sockaddr *)&saServer,sizeof(saServer));
========================
Many Thanks,
John

Runtime Error??

MVH9-Dec-02 20:48

MVH

9-Dec-02 20:48

Hi!
I've two identical machines (NT4.0, same IE, SP6a). I got a program that works in one machine, but the other one gives a messagebox "Microsoft Visual C++ Runtime Library", "Runtime Error!", the name of the program crashing and "abnormal program termination.

The machines are supposed to be totally identical basic installation (except the other one has more programs installed on it).

What files should I check to have the same versions?? What is causing that? Comctl32 is the same, so is MSVCRT.DLL.

Re: Runtime Error??

KarstenK9-Dec-02 21:29

KarstenK

9-Dec-02 21:29

This can be a very tricky problem. Look with the dependency Walker which dlls you are using and compare the versions.

IMHO it looks like a initialization error. A value out of the registry is missing or a file can´t be opened because the path doesn´t exist.

I would start a debug build on the crashing machine. Suspicious | :suss:

Try this @ home. (B&B)

Lizp9-Dec-02 20:31

Lizp

9-Dec-02 20:31

at run time i want to known a fuction's caller ,how can?
for example:
void a(int i)
{
CString szCaller = GetTheCaller();
MessageBox(szCaller);
}
void b(int j)
{
a(j);
}
I'd like to get a message :"void b(int j)"
How to implement method "GetTheCaller()"

Scratch

MVH9-Dec-02 21:08

MVH

9-Dec-02 21:08

How 'bout just passing the caller as a string argument?

Getting the calling function's name as a string is way beyond my knowledge Wink | ;)

Lizp9-Dec-02 21:26

Lizp

9-Dec-02 21:26

It's a good idea,but didn't fit my application.

Scratch

Daniel Turini9-Dec-02 21:22

Daniel Turini

9-Dec-02 21:22

You want a stack trace, huh?
I did it once and regreted it. It was a great bunch of work.
Some starting points:

1. Look at the StackWalk Win32 API function. Walk the stack until you find the calling function.
2. Once with the address of the calling function, you'll need the SymFromAddr Win32 API function.
3. You'll need to ship the PDB file together with your application, because the Symbol functions will need this file.

If you only need this info for debugging purposes, you could try looking, IIRC, the address (&i)[1] (the address of the first parameter + 4 bytes. In your case, the parameter is an int), which will give you the return address on the stack. This is a hack and can fail for a hundred reasons, including the automatic inline made by the optimizer. The right way of doing it is the StackWalk way.

I see dumb people