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hi
i have trying to figure out MFC concepts.SOmehow i haven't yet.i bought already five or six books like Kruglinski , sams 21 days ,beginnig vc++.somehow i am impressed with your advice and jsut ordered this book by Jones.hope i will be in good stead in no time
.thansk
chandra
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Raskolnikov wrote:
Would I be better off reading online documents at MSDN libarary?
From the sounds of things you have enough experience that maybe you should consider reading the MSDN and maybe some of the stuff here on CP. The MSDN doesn't really show you how to program, but if you know that already, it documents MFC just fine.
Christian
We're just observing the seasonal migration from VB to VC. Most of these birds will be killed by predators or will die of hunger. Only the best will survive - Tomasz Sowinski 29-07-2002 ( on the number of newbie posters in the VC forum )
Cats, and most other animals apart from mad cows can write fully functional vb code. - Simon Walton - 6-Aug-2002
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An argument to a method said it takes an LPDISPATCH. I didnt find it in the mSDN. Anyways my purpose was to blank out a picture box (third party) and when I put FALSE in the function, it gave me the desired result. So what exactly is an LDISPATCH. How is it that FALSE is an LDISPATCH?
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typedef IDispatch *LPDISPATCH;
Look for documentation on IDispatch
Michel
It is a lovely language, but it takes a very long time to say anything in it, because we do not say anything in it, unless it is worth taking a very long time to say, and to listen to.
- TreeBeard
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I have had the same question some time ago, so my investigations might help you to.
IDispatch in COM is like history in life, it is the mother of everything.On the other hand they are like women, they dont have any useful feature but you still cannot exist without them.
If you have this poiter you can gain access to any other related pointer by calling QI (QueryInterface) on it.
Thus the pointer itself is of no ethical value.
Hope this helps.
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I have a program in which most of my users wish to be able to press Enter to go from field to field instead of Tab.. I have been putting this off for quite a while because I have been assuming that I would have to override the CEdit class and all other resource classes that I use..
what ive noticed is that nowhere else in the software do you need to hit enter.. so I'm wondering if there is a way to always reinterpret an Enter key press as a Tab key.. Or even a whole dialog at a time?
any suggestions?
-dz
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You could write an event handler for the WM_KEYDOWN event, and if the key pressed was event then call the default event handler after changing the key pressed to Tab.
Does that make sense?
Pete
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Hi all
I have C++ application that I want people to demo via a webpage.
Is it posible to Write a Java Applet to interface my application?
I would of course have to serve the application off of my web server.
Is this possible??
any help appreciated.
IGeorgeI
George W
Software Developer
www.zsystems.ca
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if u mean a java runs ur c++ exe, it is very easy, use java code:
Runtime.exec
that is all.
includeh10
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Hi all,
I need to set quota limit for users on a shared folder on a file server.
How to implemented it in VC++? Is there a API function?
Thanks
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Check these COM interfaces:
IDiskQuotaControl
IDiskQuotaEvents
IDiskQuotaUser
IDiskQuotaUserBatch
IEnumDiskQuotaUsers
AFAIK, there's no non-COM API with HQUOTAs and such.
Tomasz Sowinski -- http://www.shooltz.com
Never argue with an idiot, he'll bring you to his level and beat you with experience.
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Dear all,
This problem of mine has been bugging me crazy.
I have to load a 24bit .bmp file and convert it to a 32 bit bmp file.
I've manage to load the bitmap file, display it on the screen and even made the code to make it a 32bit bitmap.
The problem is to attach the modified bits to the m_bmpBitmap CBitmap object. Then I get the info of the m_bmpBitmap with the BITMAP structure.
BITMAP bm;
m_bmpBitmap.GetBitmap(&bm);
The bm.bmBits is 0x0 which it shouldn't be.
All the CreateBitmap() and GetBitmap() funtions return successful but I can't even display the image to screen and I feel it is due to bm.bmBits = 0x0.
I've even tried to create a 24 bit bitmap with the same method below and it didn't work too.
I would like to be able to view the image that I created and as well as to be able to save it. I welcome any new ideas on how to approach this matter.
Many many thanks.
Chun Te, Ewe
-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
CBitmap m_bmpBitmapOri;
CBitmap m_bmpBitmap;
BYTE *m_pOriSrc, *m_pSrc;
HBITMAP hBitmap = (HBITMAP) ::LoadImage(AfxGetInstanceHandle(), "h:\\logo.bmp"
,IMAGE_BITMAP, 0, 0, R_LOADFROMFILE | LR_CREATEDIBSECTION);
m_bmpBitmapOri.Attach(hBitmap);
BITMAP bmOri;
m_bmpBitmapOri.GetBitmap(&bmOri); // Get the loaded bitmap
m_pOriSrc = (BYTE*)bmOri.bmBits; // Pointer to the original bitmap bits
// Prepare a new location
if(m_pSrc!=NULL) delete [] m_pSrc;
m_pSrc = new BYTE[(bmOri.bmHeight+1)*bmOri.bmWidth*4];
...
some code to change from 24bpps to 32 bpps (if needed I can provide)
...
if (m_bImageValid) m_bmpBitmap.DeleteObject();
// Creating the image
m_bmpBitmap.CreateBitmap( bmOri.bmWidth, bmOri.bmHeight, 1, 32, m_pSrc );
BITMAP bm; // Obtain info regarding bitmap
m_bmpBitmap.GetBitmap(&bm); //
// Create a device contect to load the bitmap into
CDC dcMem;
CClientDC pDC(this);
dcMem.CreateCompatibleDC(&pDC);
dcMem.SelectObject(m_bmpBitmap);
pDC.BitBlt(250, 7, bm.bmWidth, bm.bmHeight, &dcMem, 0, 0, SRCCOPY);
// Won't display image
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I want to scroll to the last line of my edit box. Is there a simple way to do this? Thanks
-Ken Mazaika
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I tried this...is there a reason it didn't work?
class CMsgBox : public CEdit<br />
{<br />
protected:<br />
LESULT DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam);<br />
};<br />
<br />
<br />
and in the module:
#include "headerFile.h"<br />
<br />
LRESULT CMsgBox::DefWindowProc(UINT message, WPARAM wParam, LPARAM lParam)<br />
{<br />
LRESULT result = CEdit::DefWindowProc(message, wParam, lParam);<br />
if (message == WM_SETTEXT)<br />
SendMessage(EM_SCROLL, SB_BOTTOM, 0);<br />
return result;<br />
}<br />
Is there something I'm going wrong? Thanks.
-Ken Mazaika
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My release build works but the debug build crashes at at the delete. It says its a memory check error. The release version sails on through. Actually the debug version will keep going after the crash(retry) then crash again, and retry restores it. So the logic is working but I'm doing something really wrong.
memory check error at 0x002F59AA = 0x00, should be 0xFD.
Any ideas?
Thanks,
ns
char* photo1;
photo1 = new char [strlen(pDoc->m_db.m_photoInfo)];
strcpy(photo1,pDoc->m_db.m_photoInfo);
char* pDelimiter = strstr (photo1, ",");
ASSERT (pDelimiter != NULL);
*pDelimiter = '\0';
char* dbname = photo1;
m_PhotoDBName = dbname;
pDelimiter++;
CString mineName = pDelimiter;
<code> delete[] photo1</code>;
When I hit debug, it gave the error (user breakpoint called from code at (some address).
It went into dbgheap.c. Does this help in diagnosing the problem?
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You need to allocate room for the terminating NULL
photo1 = new char [strlen(pDoc->m_db.m_photoInfo) + 1];
CPUA 0x5041
Sonork 100.11743 Chicken Little
"So it can now be written in stone as a testament to humanities achievments "PJ did Pi at CP"." Colin Davies
Within you lies the power for good - Use it!
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Well, that took care of one of them! The next crash is again at a delete[] (I just started using delete!) It turns out to be a variable I dont need, but still want to know whats wrong:
m_pCommandPhoto->ActiveConnection = m_pConn1;
CString partQuery = "'"+MineName+"'";
char* partQuery0 = new char(partQuery.GetLength()+1);
strcpy(partQuery0,partQuery);
CString SQLQ = "SELECT * FROM tblMine WHERE (DefID = "+partQuery+")";
char* SQLQuery = new char [SQLQ.GetLength()+1];
strcpy(SQLQuery, SQLQ);
AfxMessageBox(SQLQuery);
<code>delete[] partQuery0;</</code>pre>
Thanks,
ns
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You've used () in the new statement, which makes the length a parameter that is passed to the char constructor. This means that your newing with the non-[] form so delete [] fails
change it to
char* partQuery0 = new char[partQuery.GetLength()+1];
Roger Allen
Sonork 100.10016
I think I need a new quote, I am on the prowl, so look out for a soft cute furry looking animal, which is really a Hippo in disguise. Its probably me.
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Thanks so much. So a new done my other way with () is legal? I didnt think we could do that. I appreciate your help,
Thanks,
ns
Incidentally the release version was perfectly happy with it!!! Would this have shown up later as a problem in the release?
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ns wrote:
So a new done my other way with () is legal?
Yes, although it means an entirely different thing. This allocates one char and initializes it:
char* pch = new char ('a');Since chars and ints are interchangeable to a degree, you can stick a number less than 255 in place of 'a' above.
--Mike--
Just released - RightClick-Encrypt v1.3 - Adds fast & easy file encryption to Explorer
My really out-of-date homepage
Sonork-100.19012 Acid_Helm
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Great! Thanks for the explanation. Appreciate it!
ns.
Wonder why the release exe didnt crash.
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One bit of advice: why on Earth are you bugging yourself with new/delete when you're already using CString? Instead of new/strcpy just declare a CString and assign your text.
Tomasz Sowinski -- http://www.shooltz.com
Never argue with an idiot, he'll bring you to his level and beat you with experience.
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Hi!
I have a dialog based app. I have a bunch of child dialog in my main dialog which I keep showing and hiding based on a few user actions. I need to know when these child dialogs loose focus. I tried WM_KILLFOCUS, WM_ACTIVEATE, but for some reason neither of these messages get sent to my child dialog or even my main dialog for that matter. Does anybody have any suggestions on how I could fix this or maybe get around it?
Thanks,
NC
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