C / C++ / MFC

Re: CFile::Open Timeout's??

31-May-04 1:17

Try this, but this is not CWebBrowser2 control. It is a custom view.

http://www.codeproject.com/dotnet/dhtmlview.asp

Sonork 100.41263:Anthony_Yio

CFile::Open Timeout's??

shultas30-May-04 15:23

shultas

30-May-04 15:23

Hey all.

I'm using CFile to access some files across a network share. It works great when the servers are all online, however if one of the servers goes offline, the CFile::Open will try to open the file across it for 30-60 seconds (which is too long for this app that I'm building).

I am wondering if there is a way to set a default open timeout .... so it will try for say, 5 seconds, and if it can't get it, it fails and returns false?

TIA!!

Anthony_Yio31-May-04 0:40

31-May-04 0:40

How about to use

_taccess(const char *path, int mode );

in io.h?

Sonork 100.41263:Anthony_Yio

Access key

JR Shih30-May-04 14:47

JR Shih

30-May-04 14:47

Hi,
I assign a access key to a control, ex. &access.
But besides Alt-A and A, Ctrl-A ,Shift-A, and 1+A, ... all recive WM_COMMAND. Is this by default ? and how do I disable them?

Re: Access key

Anthony_Yio31-May-04 0:51

sending messages to the main window

31-May-04 0:51

(From MSDN)

The WM_COMMAND message is sent when the user selects a command item from a menu, when a control sends a notification message to its parent window, or when an accelerator keystroke is translated.

Accelerator keystrokes that select items from the window menu are translated into WM_SYSCOMMAND messages.

You can assign you own accelerator keystroke to other keys like Ctrl A to correspond to your needed menu?

Sonork 100.41263:Anthony_Yio

Re: Access key

JR Shih31-May-04 2:25

JR Shih

31-May-04 2:25

Thanks, but I need to disable ctrl- and shift- instead of enable them. All articles I searched about access key in MSDN, don't mention that ctrl- and shift- are access keys, so I doubt that ctrl- and shift- are by default.

kfaday30-May-04 14:32

30-May-04 14:32

Hello!
I've got this thread function and in the postmessage line i'd like to send a message to the main view of the program. (it's an MFC project).

<br />
DWORD WINAPI CHilos::ThreadProc(LPVOID objeto)<br />
{<br />
	CHilos* thread=(CHilos*)objeto;<br />
	while (thread->Alive)<br />
	{<br />
		while((thread->Alive)&&(thread->Active))<br />
		{<br />
			thread->Work();<br />
		}<br />
	}<br />
	::PostMessage(HWND_BROADCAST, WM_ONFINISH, 0, 0);<br />
	return true;<br />
}

The project is called hiloss, and in hilossView.cpp i declared in the message map:

ON_MESSAGE(WM_ONFINISH, OnThreadended)

and then in the same file there's the definition of the OnThreadended function.

The problem is with the postmessage is that the message never reaches the top window, actually when i debug the project, it never gets into the OnThreadended function.

Is HWND_BROADCAST ok? i think there's the problem. I want to send a message to the ChilossView class, which is the main window of the project, but i don't know how.

thanks!!

Ryan Binns30-May-04 18:07

Ryan Binns

30-May-04 18:07

HWND_BROADCAST won't send the message to your view. It sends the message to all the top-level windows in the system. In MFC, this is the instance of your CMainFrame class. You'll either have to the send the message to your view directly, or handle the message in CMainFrame.

Hope this helps,

Ryan

"Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"

kfaday31-May-04 2:49

31-May-04 2:49

how could i send the message directly to the view?
thanks

Anthony_Yio31-May-04 0:59

31-May-04 0:59

When is OnThreadended been called? in WM_ONFINISH?

And the OnThreadended will call the ThreadProc which will post WM_ONFINISH?

Seems like an deadlock for me.

Sonork 100.41263:Anthony_Yio

kfaday31-May-04 2:50

error C2065: 'cout' : undeclared identifier

31-May-04 2:50

Anthony_Yio wrote:
When is OnThreadended been called? in WM_ONFINISH?

yes.

Anthony_Yio wrote:
And the OnThreadended will call the ThreadProc which will post WM_ONFINISH?

no, OnThreadended does other things

thanks for answering!

Anonymous30-May-04 13:43

Anonymous

30-May-04 13:43

Hey,

I am tring to teach my self C++ from a book. And it is not going as well as i planned. I am tring to make the first program in the book and I keep getting the same error. I am using Visual C++ 6 as my compiler. The Program is very simple (Not for me i guess haha):

// myfirst.cpp--displays a message

#include "stdafx.h" // a PREPROCESSOR directive // make definitions visible
int main() // function heading
{ // start of function body
cout << "Come up and C++ me some time."; // message
cout << "\n"; // start a new line
return 0; // terminate main()
} // end of function body

The Error I always get is:

myfirst.cpp

c:\Documents and Settings\Ben Quinn\My Documents\Visual Studio Projects\myfirst\myfirst.cpp(6) : error C2065: 'cout' : undeclared identifier

c:\Documents and Settings\Ben Quinn\My Documents\Visual Studio Projects\myfirst\myfirst.cpp(7) : error C3861: 'cout': identifier not found, even with argument-dependent lookup

I am using the 32bit App Option like the book said to use. there is one difference between mine and the book's code. Their's code says:

#include <iostream>
using namespace std;

But whenever I use that I get the Error:

Compiling...
myfirst.cpp
c:\Documents and Settings\Ben Quinn\My Documents\Visual Studio Projects\myfirst\myfirst.cpp(12) : fatal error C1010: unexpected end of file while looking for precompiled header directive

I hope some one can help me out. I really wana get past the first 3 pages.

Thx

- Hidden

Re: error C2065: 'cout' : undeclared identifier

kfaday30-May-04 14:37

Re: error C2065: 'cout' : undeclared identifier

30-May-04 14:37

what about at the top?
#include <iostream.h>

Teach Yourself C++ in 21 Days - Second Edition
is a good way to learn c++. It's free. look it up in google

Michael Dunn30-May-04 16:25

Re: form background bitmap

30-May-04 16:25

See the FAQ
2.1 I'm trying to use a standard C++ library class (like cout, cin, or string) but the compiler gives an undeclared identifier error (C2065) on those names. Why?[^]

--Mike--
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----
"Just because the box has 2 gigabytes of memory doesn't mean you get to use it all!"
-- Rico Mariani, CLR perf guy

form background bitmap

zubeido30-May-04 13:41

zubeido

30-May-04 13:41

Hi all!
I've been tring to put a bitmap background image on the main Dialog but nearest i can get is this:

CDC* pDC=GetDC();
CDC old; //New device context used as the source DC
//Creates a deice context compatible to pDC
old.CreateCompatibleDC(pDC);
CBitmap dlg_bmp;
CRect rect;
GetClientRect(&rect);
dlg_bmp.LoadBitmap(IDB_BITMAP3);
CBitmap* oldbmp= old.SelectObject(&dlg_bmp);
pDC->BitBlt(rect.left, rect.top, rect.Height(), rect.Width (),&old,0,0,SRCCOPY);
old.SelectObject(oldbmp);
dlg_bmp.DeleteObject(); //Deletes the bitmap
Invalidate();

when this runs the bitmap is loaded and it overrun the other controls hiding them
If some one help me i'd be very gratefull

AI_Warrior

Michael Dunn30-May-04 16:27

Re: form background bitmap

30-May-04 16:27

You need to handle WM_ERASEBKGND and paint the bitmap in response to that message.

--Mike--
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----
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Aizaz31-May-04 2:14

Aizaz

31-May-04 2:14

try setting the background brush of the dialog box by usning the setclasslong method use GCL_HBRBACKGROUND as the index in the api.

funny working ListBox - help!

Anonymous30-May-04 11:46

Anonymous

30-May-04 11:46

Hi!

I have a problem with setting the character set in my ListBox (List). When I create a CFont object with a specific character set and I set that font in the Device Context recieved from the ListBox, then it is OK. I can write through that DC in the chosen charset. See Code :

CFont * font = new CFont; 
CFont *oldFont; 
CPaintDC dc( List ); 
font->CreateFont (28,0,0,0,700,0,0,0, 
	RUSSIAN_CHARSET, OUT_DEFAULT_PRECIS, 
	CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY, 
	DEFAULT_PITCH|FF_DONTCARE, "Arial"); 
oldFont = dc.SelectObject( font); 
dc.ExtTextOut(10,170,0,NULL,"some text", 
strlen("some text"),NULL);

!!!!!!!!! BUT !!!!!!!!!
If I set that font right in my ListBox and want to have the text added with code :

<br />
List->SetFont( font, TRUE); <br />
List->AddString( "some other text" ); <br />

in the chosen charset, then it DOES NOT work !
However the added text has the other parameters of the chosen font ( Height and so on) but the charset is the original (standard) one
Does anyone know how to force the ListBox to accept the charset from the font also ? Or it might be a bug in my Visual Studio ?
PLEASE HELP!

Deriving Edit Box Control

Grahamfff30-May-04 11:11

Grahamfff

30-May-04 11:11

I have been trying to have an Edit Box take the Tab key as a simple move off the control - just tab around all the controls with Tabstop set.
Currently the Tab acts as an end to data input (i.e. like a Return or Enter key pressed). I did start to Derive the Edit Box control, but got stuck, see code below!

// MyEdit.cpp : implementation file<br />
//<br />
<br />
#include "stdafx.h"<br />
#include "MyEdit.h"<br />
<br />
<br />
// CMyEdit<br />
<br />
IMPLEMENT_DYNAMIC(CMyEdit, CEdit)<br />
CMyEdit::CMyEdit()<br />
{<br />
}<br />
<br />
CMyEdit::~CMyEdit()<br />
{<br />
}<br />
<br />
BEGIN_MESSAGE_MAP(CMyEdit, CEdit)<br />
 //{{AFX_MSG_MAP(CMyEdit)<br />
 ON_WM_GETDLGCODE() <br />
 //}}AFX_MSG_MAP<br />
END_MESSAGE_MAP()<br />
<br />
<br />
// CMyEdit message handlers<br />
<br />
UINT CMyEdit::OnGetDlgCode()<br />
{<br />
	//return CEdit::OnGetDlgCode() | DLGC_WANTTAB;<br />
	//return DLGC_WANTALLKEYS;<br />
	return DLGC_WANTTAB;<br />
// WHat am I doing hear!!!!<br />
}

Currently the Edit Box (MyEdit) only processes the TAB key, I want it to process all keys but with the Tab key just move on to the next tabstop.

Help!

grahamfff

C++ Launches File

vinniez_ok30-May-04 9:22

vinniez_ok

30-May-04 9:22

Lookin' for a l'il help here.
How do you launch a file from within a compiled C++ project?
I'd like my file to have a Switch where Case 1 is print this picture on the screen, Case 2 is leave program and launch a:\screensaver.exe
Is such a thing possible?
Thx

". . .gonna keep on tryin' - til I reach my highest ground"

Ravi Bhavnani30-May-04 9:45

Ravi Bhavnani

30-May-04 9:45

This will activate the currently selected screensaver:

BOOL bScreenSaverEnabled = FALSE;
BOOL bStatus = ::SystemParametersInfo
                (SPI_GETSCREENSAVEACTIVE, 0, &bScreenSaverEnabled, 0);
if (bStatus && bScreenSaverEnabled)
   AfxGetMainWnd()->SendMessage (WM_SYSCOMMAND, SC_SCREENSAVE);

[edit]
Ooops, I just re-read your post. Use CreateProcess() to execute an app from within your app.
[/edit]

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
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Michael Dunn30-May-04 10:09

30-May-04 10:09

See the FAQ
6.4 How do I run another program from my program?[^]

--Mike--
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I think so Brain, but if we shaved our heads, we'd look like weasels!

vinniez_ok30-May-04 13:04

vinniez_ok

30-May-04 13:04

Thanks Mike - I think I'll punt and go with WinExec().
If these are the last lines of my code:
////////////////////////
return; // return from next to last function
}
if (QuizAvg>0.79)
{
WinExec (“a:\ballfusion.exe”, SW_SHOWNORMAL );
}
Cout<< “Sorry – your score was less than 80%.”;
Clearscreen();
}
Return 0; // end of Main()
}

Do my B+ students get the executable screen saver no matter what (in a desktop setting) and my C students get the "sorry message"?
Where would the program finalize and is there good form for ending such a program that "tosses off" to another application (destructors, clearing mrmory and the like)? Thanks!

Michael Dunn30-May-04 16:30