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I have know idea what is wrong with your code. If you handle the exception, you will find out what the problem is. Add try/catch to your code to catch the exception.
Something like this:
try {
ACMFORMATCHOOSE acmChoose;
WAVEFORMATEX fmtChoose = { 0 };
acmChoose.pwfx = &fmtChoose;
acmChoose.cbwfx = sizeof(fmtChoose);
acmChoose.cbStruct = sizeof(acmChoose);
acmChoose.hwndOwner = ghWnd;acmFormatChoose(&acmChoose);
}
catch (CExcpetion *e) {
handle the excption here ...
This is a general exception. You can catch specific derivitives with things like
catch (CFileException ...
catch (CMemoryException...
These are classes derived from CExcpetion. Your code can have multiple catch clauses for a try clause.
The first catch that qualifies will get the exception.
try {
...
}
catch (CMemoryException *e)
{
...
}
catch (CExceptin *e)
{
...
}
catch (CFileException *e)
{
... This will neverget executed, even if a file exceptionis thrown.The more general CException handler above will get it instead. Be careful of the order. Exceptin handling is a fairly deep topic and a fundamental of windows programming. I'd suggest you research windows exception handling in MSDN or other sources.
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1) What is the debugger telling you in detail about the execption? (Exception type like "Microsoft C++ exception" or "Access violation" or something like that.)
2) If you choose Cancel to debug your app, where exactly the program is halted? This is the point in code which throws the exception.
3) If the above does not give you any helpful information, it might also be a worthwhile option to single-step your code in the debugger to see where exactly the exception occurs.
--
Daniel Lohmann
http://www.losoft.de
(Hey, this page is worth looking! You can find some free and handy NT tools there  )
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Hello, Hello,
i have a problem with the doc/view architecture. i am very new to this:
the problem:
i derive a class from "cview" and want to add event when the right mouse button is clicked on the view. on this event, i want to close (destroy) the window.
i tried several comands to close the window. but none of them worked. all i got was memory problems!
who can help me
thanx in advance
kevin
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do this from your view:
GetParentFrame()->PostMessage(WM_CLOSE);
(note that in an SDI app, this will close the whole app)
-c
Conservative:
One who admires radicals centuries after they're dead.
-- Leo C. Rosten
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Is it possible to associate a file type with a document, but to have no visible view, or even no view at all?
I want the file type to be handled by my app, but not to open up a child window. I only want to process it in OnOpenDocument.
thanks,
Jake
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i have an app which uses a split screen.. and when a user has no document selected both of those views are set to a CBlankView which is derived from a CFormView, and the resource i use is just a blank dialog with no frame, menu, etc.
-dz
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My goal is similar to how Visual Studio opens Project and Workspace files: those file types are associated with VS, but they don't open up Views in the middle of the screen, they just fill in some information. I want to imitate this for opening Projects in my application.
thanks,
Jake
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I have two problem here.I read image field from database and want to show it on my formview.I use this code:
COleVariant var;
var.vt = VT_UI1;
var = field.GetChunk(field.GetActualSize());
BITMAPINFO bmInfo;
memset(&bmInfo.bmiHeader,0,sizeof(BITMAPINFOHEADER));
bmInfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
bmInfo.bmiHeader.biWidth=120;
bmInfo.bmiHeader.biHeight=120;
bmInfo.bmiHeader.biPlanes=1;
bmInfo.bmiHeader.biBitCount=24;
HDC pDC = ::GetDC(0);
HDC TmpDC= CreateCompatibleDC(pDC);
HBITMAP TmpBmp=CreateDIBSection(pDC,&bmInfo,DIB_RGB_COLORS,(void**)&var,0,0);
HGDIOBJ TmpObj=SelectObject(TmpDC,TmpBmp);
CRect rect;
GetClientRect(&rect);
int nX = rect.left + (rect.Width() ) / 3;
int nY = rect.top + (rect.Height() + 500 ) / 2 ;
BitBlt( pDC, nX, nY , 200, 200 , TmpDC , 0 , 0 , SRCCOPY );
Only black rectangle appear on my form.I don't know if the problem from reading data from database or my setting for bitmap has some problem.Those who know bitmaps can tell me if it has correct setting.
My second problem is that I can't put bitmap in correct place.It goes out of the application.How can I manage it correctly?
Mazy
"If I go crazy then will you still
Call me Superman
If I’m alive and well, will you be
There holding my hand
I’ll keep you by my side with
My superhuman might
Kryptonite"Kryptonite-3 Doors Down
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Just out of curosity, how do you make a CFindReplaceDialog application modal? I noticed that the one that comes with Excel is app modal, but the one I have is not. So, essentially, if you have two workbooks open in excel and open the find dialog on one of them, it doesn't allow you to switch to the other document until you close the dialog. I gather it must be some flag that is set somewhere..any idea what?
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Hey all,
I am trying to research the feasability of putting together a TFTP file upload for reprogramming an embedded system. I am writing the PC side. I realize that TFTP is a protocol and I am going to read the RFC tonight, however I was wondering if anyone has seen an article or source code that shows examples of something like this.
It needs to be supported over RS232 and IP, which should be possible. The biggest hurdle, I think is that my employer wants instant turn around to get the product out the door. So yes I am looking for examples to reduce turn around, if possible.
Thanks,
Brian aka SanShou
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TFTP servers are pretty easy to write - we've used them for downloading software to embedded systems a few times, usually over a proper TCP/IP stack. To use TFTP over RS232, you're going to have to provide an interface to the RS232 link that effectively emulates what the TCP layer would provide (I think) - no biggy, dial-up modem does that.
As to existing software, try looking on a Linux distro - there may be TFTP software on that, with source?
Stuart Dootson
'Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p'
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I tried to use OnContextMenu and OnRButtonDown to popup the context menu when click right mouse button in a CHtmlView class. When I test it, no menu popup. How to fix it? Thanks.
mIchAel Liu
__________________________________________________________
The secret of business is to know something that nobody else knows. 
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OnContextMenu and OnRButtonDown are MFC command handlers. The trouble is that CHtmlView derives from a CView but provides no real support for it. CHtmlView is basically a wrapper around the web browser ActiveX control. You can check out yourself by the way because we have all the code for it.
So all right clicks are in fact consumed by the ActiveX.
The good news is that the web browser control has a mechanism to supersede context menus. You have to implement the IDocHostUIHandler interface. You have built-in samples in MSDN library. (and even in codeproject as far as I remember).
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Thank you. It's a good point.
mIchAel Liu
__________________________________________________________
The secret of business is to know something that nobody else knows.
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Hello there,
I have 10 editbox in my dialog ...
I want to show a message when user pressed enter in the EditBox Number 2(for example) !!!
How can i do that ?
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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Keyboard messages...[^]
This should answer your question.
int x=1, y=5;
x^=y^=x^=y;
<a href="http://www.codeproject.com/useritems/StupidXORTrick.asp" target="_blank">ClickHereForHelp();</a>
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1. Create your own class, say MyEdit.
2. Derive it from CEdit.
3. In my edit add a handler for the message WM_GETDLGCODE message by using the class wizard.
4. The Wizard will add the handler afx_msg UINT OnGetDlgCode() for you.
5.Replace the default return value by return DLGC_WANTALLKEYS;
6.Now in the same way add one more handler for WM_KEYDOWN. nChar value will be 13 for Enter-Key. Handle the Enter-Key event here.
7. Use the new class in your dialog box instead of the CEdit class to get Enter-Key event.
Regards,
Rejeesh
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How can I listen a port and map the OnConnect, OnAccept, OnReceive and OnClose events to the socket that listen the port ??
Any example ??
Thanks,
Cristiano.
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Derive your own Socket class from CSocket, you can then easily react on the On..() event. Here's how I've derived the CSocket class:
#include "stdafx.h"
#include "UDPSocket.h"
#include "MainFrm.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
CUDPSocket::CUDPSocket()
{
}
CUDPSocket::~CUDPSocket()
{
}
#if 0
BEGIN_MESSAGE_MAP(CUDPSocket, CAsyncSocket)
END_MESSAGE_MAP()
#endif // 0
void CUDPSocket::SetParent(CFrameWnd *pWnd)
{
m_pWnd = pWnd;
}
void CUDPSocket::OnReceive(int nErrorCode)
{
if (nErrorCode == 0)
((CMainFrame*)m_pWnd)->OnReceive();
}
and the header file:
#if !defined(AFX_UDPSOCKET_H__B455316B_592B_4066_B909_F961153C0A61__INCLUDED_)
#define AFX_UDPSOCKET_H__B455316B_592B_4066_B909_F961153C0A61__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CUDPSocket : public CSocket
{
public:
public:
CUDPSocket();
virtual ~CUDPSocket();
public:
void SetParent(CFrameWnd *pWnd);
protected:
virtual void OnReceive(int nErrorCode);
private:
CFrameWnd* m_pWnd;
};
#endif
You can then, after you have set up the Socket, Listen with
CUDPSocket sock;
sock.Listen();
Hope this helps 
modified 12-Sep-18 21:01pm.
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Ok, Gregor ... thanks !!!
One more thing,
.
.
CUDPSocket sock;
//setup the socket
sock.Listen();
.
.
How can I accept a connection ??
Do I need to use Create, Listen and Accept function ?? How ??
How I use the SetParent(CFrameWnd *pWnd) function on my class dialog ?
Thanks again,
Cristiano.
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If you have a dialog based app I suggest you to change CFrameWnd to CDialog. Then, e.g. in OnInitDialog() you simply call socket.SetParent(this);
One again, if you have a dialog you should replace all instances of "CMainFrame" to "CYourDialog" in the derived socket class.
Then you create the functions OnAccept, OnReceive and so on in your dialog class so that the Socket class can redirect the events to your dialog. (That's what ((CMainFrame*)m_pWnd)->OnReceive(); is for).
All you need to do before the Listen() call is to "Create()" your socket.
In the OnAccept() handler inside your dialog (or mainframe class) you simply call socket.Accept(...)
regards
modified 12-Sep-18 21:01pm.
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Ok, its work partially well ...
The OnAccept event (not OnConnect ??) triggered.
But, the OnReceive and OnClose events don't triggered.
Any idea ??
Thanks,
Cris.
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Did you implement them in your derived CSocket class and did you set up similar functions in your Dialog/Mainframe class? If yes, everything should work fine.
Well, don't forget to change all occurances of "CAsyncSocket" to "CSocket" in your derived class
modified 12-Sep-18 21:01pm.
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What do means: "change all occurances of CAsyncSocket to CSocket in your derived class" ??
I changed my derived class to derive from 'CAsyncSocket' and not more 'CSocket', but don't work too. I don't receive the OnReceive and OnClose events.
[]'s
Cris.
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Hi,
I disabled listbox style 'No integral height', but it doesn't work with resizeable dialogs/controls.
Yes, I'd like to see only full visible items. When I resize the dialog, the listbox becomes also resized... and I see partly visible items. It seems 'integral height' is being ignored. What I'm doing wrong?
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