Re: Focus Rect on a CButton - C / C++ / MFC Discussion Boards

Matt Newman12-Sep-01 13:30

12-Sep-01 13:30

I am a beginner programmer and I don't know much about debugging but I get KERNAL32 errors when I hit the close button now and have no idea what to do. When I hit close I get this error box:

%Name% has caused an error in
KERNAL32.DLL
%Name% will now close

When I hit debug I get another one that says:

Unhandled exception in %Name%.exe (KERNAL32.DLL): 0xC0000005: Access Violation.

Then a yellow arrow is pointing at the following code:

BFF64346	xadd	dword ptr [ecx],eax

Where should I be looking and what should I look for? I tried commenting out all functions etc except:

CDialog::OnOK();

Please help

-Matt Newman Suspicious | :suss:

Re: Debugging

Tim Deveaux12-Sep-01 14:07

Tim Deveaux

12-Sep-01 14:07

One place to start is to display the call stack (alt+7 if memory serves). You may (or may not) be able to dclick back to some area in your apps exit code that gives you a clue.

How do I use the lparam of TV_INSERTSTRUCT

Craig Miller12-Sep-01 13:15

Craig Miller

12-Sep-01 13:15

Hi,

I'm trying to set the lparam of a TV_INSERTSTRUCT to an integer value and everytime I call GetTreeCtrl()->GetItemData(hItem) I always get back 0. Following is my code:

TV_INSERTSTRUCT tvInsert;
tvInsert.hInsertAfter = TVI_LAST;
tvInsert.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE;
tvInsert.item.hItem = NULL;
tvInsert.item.stateMask = 0;
tvInsert.item.state = 0;
tvInsert.item.iImage = 4;
tvInsert.item.iSelectedImage = 0;

int inputId = 17;
tvInsert.item.lParam = (LPARAM)inputId;

CString szName("Hello World");
tvInsert.item.pszText = (LPTSTR) (LPCTSTR) szName;
				
HTREEITEM hParent = GetTreeCtrl().InsertItem(&tvInsert);

//This works fine
CString szText(GetTreeCtrl().GetItemText(hParent));
//This doesn't work at all - iId is always 0
int iId = GetTreeCtrl().GetItemData(hParent);

Does anyone know why I always get back a 0 in iId? This is very frustrating.

Thanks for any help you can provide,

Craig

Re: How do I use the lparam of TV_INSERTSTRUCT

Michael Dunn12-Sep-01 13:31

Michael Dunn

12-Sep-01 13:31

tvInsert.item.mask = TVIF_TEXT | TVIF_IMAGE | TVIF_SELECTEDIMAGE;

Add TVIF_PARAM to that.

--Mike--
http://home.inreach.com/mdunn/
Ford: How would you react if I said that I'm not from Guildford after all, but from a small planet somewhere in the vicinity of Betelguese?
Arthur: I don't know. Why, do you think it's the sort of thing you're likely to say?

Re: How do I use the lparam of TV_INSERTSTRUCT

Craig Miller12-Sep-01 13:41

Craig Miller

12-Sep-01 13:41

Thanks Michael,

Something so easy that I totally overlooked, works great...

Thanks again,

Craig

Focus Rect on a CButton

Remi Morin12-Sep-01 10:57

Remi Morin

12-Sep-01 10:57

Hi,
I've create a very little bitmap button (that class is derived from CButton) and I don't want it draw a focus rect. In fact the focus Rect is draw over the bitmap and my button is so small that we are unable to understand it

so if you find a way to remove it, tell me please

thanks

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: Focus Rect on a CButton

Derek Lakin12-Sep-01 22:13

Derek Lakin

12-Sep-01 22:13

You need to override the DrawItem function to handle your own drawing.

There are many owner-drawn buttons that have bitmap support here already, e.g. CButtonSSL, which I wrote Wink | ;)

It would only take a few small changes to prevent the focus rectangle being drawn (just comment out the call to DrawFocusRect).

Derek Lakin.
Salamander Software Ltd.

Re: Focus Rect on a CButton

Remi Morin13-Sep-01 3:50

Remi Morin

13-Sep-01 3:50

Hi thanks for the tips but it's a big implementation for something so simple. I did'nt find what I'm searching for but I will. This is for a commercial application, in fact a application that we sold whit hardware, but this application will need modification/update very often, the reason why I'm doing it now (and i'm not using the old one) it's because modification/update are too hard. So I want to minimize the code. I'm doing a scroll bar derived from CWnd to get strange functionality, and I'm doing the little arrow at each end of my scroll bar. For these button, I don't want any Focus rect, everything else work already very well whitout so much code.

So I don't want add a big button class when CButton do already the job very well, except for that f*** focus rect.

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

_T("")

RobJones12-Sep-01 9:52

RobJones

12-Sep-01 9:52

Dumb question from a beginer.. Whats the advantage of using this on your strings?

Rob Jones

Re: _T("")

C^hris L^osinger12-Sep-01 9:56

C^hris L^osinger

12-Sep-01 9:56

if you use this, when you switch from non-Unicode to Unicode builds, your string constants will convert accordingly.

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Appending integer values to a string? (for Tree labels)

12-Sep-01 9:12

I want to add items to a tree which have incremental numerical labels, how can I do this?

I want my items to consist of the CString "Section" + the short value generated by a FOR loop.
i.e. "Section 0"
"Section 1"
......
"Section 120"

Please help!

Pete T

Re: Appending integer values to a string? (for Tree labels)

C^hris L^osinger12-Sep-01 9:17

C^hris L^osinger

12-Sep-01 9:17

see one of the following:

CString::Format
sprintf
itoa

-c

------------------------------
Smaller Animals Software, Inc.
http://www.smalleranimals.com

Re: Appending integer values to a string? (for Tree labels)

Carlos Antollini12-Sep-01 10:31

Carlos Antollini

12-Sep-01 10:31

My money in CString::Format
Big Grin | :-D

Carlos Antollini.

Please help with memory leak

Craig Miller12-Sep-01 8:53

Craig Miller

12-Sep-01 8:53

Hi,

I'm currently using some code that I found in the forum to write a file to a database and it almost works. It appears that I have some memory leaks that I can't seem to find. Following is the code I'm using which is in a loop. I loop through a directory of images so I can load them into a database.

CFile tmpFile(fileName, CFile::modeRead);
				
//Read from bitmap file into buffer.
LONG nTotalBytes = tmpFile.GetLength();
				
//Allocate a buffer for the input and read from file.
BYTE * inputBuf = new BYTE[nTotalBytes];
UINT nBytesRead = tmpFile.Read(inputBuf, nTotalBytes);
				
CLongBinary cx_LongBinaryImage; 
cx_LongBinaryImage.m_dwDataLength = nTotalBytes; //set the cx_LongBinaryImage.m_hData = GlobalAlloc(GMEM_MOVEABLE,                   nTotalBytes); //allocates a HGLOBAL handle for the CLongBinary object.
				
BYTE* pITemp = (BYTE*) GlobalLock(cx_LongBinaryImage.m_hData); //pITemp is pointing at the address of the HGLOBAL handle
memcpy(pITemp, inputBuf, nTotalBytes); //copy the BYTE array containing the image to the HGLOBAL address
GlobalUnlock(cx_LongBinaryImage.m_hData); //unlock the memory
				
CImageRs* cxTableImage = new CImageRs(); //CRecordset object
if (cxTableImage->Open(NULL)) //opening the database
{
	cxTableImage->AddNew(); //create new record
	cxTableImage->m_MAKE = "Yamaha";
	cxTableImage->m_MODEL = "YZF600RK/RKC";
	cxTableImage->m_YEAR = 1998;
	cxTableImage->m_NAME = FindFileData.cFileName;
	cxTableImage->m_IMAGE.m_dwDataLength = cx_LongBinaryImage.m_dwDataLength;
	cxTableImage->m_IMAGE.m_hData = cx_LongBinaryImage.m_hData;
	cxTableImage->SetFieldNull(&cxTableImage->m_IMAGE, FALSE);
	cxTableImage->SetFieldDirty(&cxTableImage->m_IMAGE, TRUE);
	if(!cxTableImage->Update())
	{
		AfxMessageBox( "Record not added; no field values were set." );
	}
					
	cxTableImage->Close();
}

delete[] inputBuf;

If I call GlobalFree on cx_LongBinaryImage.m_hData I get an error because the CLongBinary calls GlobalFree in it's destructor. Also, when I run this code in the loop I get an error, "Could not update; currently locked by user 'admin' on machine 'MYMACHINE'." This happens when the loop is halfway through the directory, I'm not sure why this is happening. I'm currently developing on Win2000 with VC++ 6.0.

Thanks for any help you can provide,

Craig

Re: Please help with memory leak

Tim Deveaux12-Sep-01 9:26

Tim Deveaux

12-Sep-01 9:26

I don't see a delete of cxTableImage ?

Re: Please help with memory leak

Craig Miller12-Sep-01 10:30

Craig Miller

12-Sep-01 10:30

Tim,

Thanks for the reply, that's what it was. Sorry for the trouble on such a simple mistake.

Thanks again,

Craig

Re: Please help with memory leak

Tim Deveaux12-Sep-01 11:05

Tim Deveaux

12-Sep-01 11:05

Why is it always easier to see the other guys bug? Smile | :)

How can i register a .dll or .ocx file in my program similar register it using regsvr32.exe?

12-Sep-01 4:37

How can i register a .dll or .ocx file in my program similar register it using regsvr32.exe?
is using the DllRegisterServer() function,which dll file will i load when i use the function?

Re: How can i register a .dll or .ocx file in my program similar register it using regsvr32.exe?

12-Sep-01 4:41

You can find the answer somewhere in this forum.
There was some example-code in a thread in the last few days.

Search the Topics and Replies, then you'll find the code

regards

Re: How can i register a .dll or .ocx file in my program similar register it using regsvr32.exe?

Ben M. Stokland12-Sep-01 4:56

Ben M. Stokland

12-Sep-01 4:56

That might have been me.. Eek! | :eek:

http://www.codeproject.com/script/comments/forums.asp?forumid=1647&select=55401&tid=55395#xx55401xx
Big Grin | :-D

SHGetSpecialFolderLocation error !!!

Fredb4512-Sep-01 4:09

Fredb45

12-Sep-01 4:09

I want to retrieve icon like "my documents" in explorer but ...

My init function:

CShellUtil::CShellUtil()
{
SHFILEINFO shFinfo;
HIMAGELIST hImgList = NULL;
LPITEMIDLIST itemlist = 0;

bError=FALSE;
if (SHGetSpecialFolderLocation(0,
SIDL_DESKTOP , &itemlist) == NOERROR)
{
hImgList = (HIMAGELIST)SHGetFileInfo((LPCTSTR)
itemlist, 0, &shFinfo,
sizeof(shFinfo ),
SHGFI_SYSICONINDEX |
SHGFI_PIDL |
SHGFI_SMALLICON );

if(!hImgList)
{
bError=TRUE;
return;
}
m_SysImgList.m_hImageList=hImgList;
}
else
{
bError=TRUE;
return;
}

Function to display icon into Tree

HTREEITEM CShellUtil::AddSpecialItem(HTREEITEM hParent, int nFolder)
{
SHFILEINFO shFinfo;
int iIcon;
BOOL bIsCDROM=FALSE;
HTREEITEM hItem;
LPITEMIDLIST pIDL;
LPMALLOC pMem;

if(SHGetSpecialFolderLocation(NULL, nFolder, &pIDL) == NOERROR)
{
if(SHGetFileInfo((LPCTSTR)pIDL, 0, &shFinfo, sizeof(shFinfo),
SHGFI_DISPLAYNAME | SHGFI_PIDL |
SHGFI_ICON | SHGFI_SMALLICON))
{
if(SHGetMalloc(&pMem)==NOERROR)
{
pMem->Free(pIDL);
pMem->Release();
}
}
}

Icon = shFinfo.iIcon;
hItem=m_TreeCtrl.InsertItem(_T("Test"), iIcon, iIcon, hParent);

return hItem;
}

When i call 'AddSpecialItem', it's OK to insert special folder
from "CSIDL_DESKTOP" to "CSIDL_STARTMENU" and
from "CSIDL_DESKTOPDIRECTORY" to "CSIDL_LOCAL_APPDATA"-> DislplayName and Icon are OK

But there is a problem from "CSIDL_MYDOCUMENTS" to "CSIDL_MYVIDEO"
No icon and no display name and SHGetSpecialFolderLocation(..) return an error
I try with

if(SHGetFolderLocation(NULL, nFolder, NULL, 0, &pIDL) == S_OK)

but no success (return E_INVALIDARG)

I use lib from microsoft SDK august 2001 on win2000 Sp2 plateform with visual sp5

Please help

Write some short options into EXE

12-Sep-01 3:57

Hi
I want to write some short options directly into my executable. They should be appended at the end
of the exe (comparable to the ID3tag in MP3files).

I know how to open files in binary and write/read to/from them.

My question:

Is it possible to write the information into my executable while it is running?
Or do I need to temporarily create a copy, write it into this file and then delete original file?

thanks in advance

Re: Write some short options into EXE

Derek Waters12-Sep-01 14:03

Derek Waters

12-Sep-01 14:03

You want to write data directly into your executable?! Really? Since MP3 files are data files, it's up to the program that uses them to define where the data goes. But I don't think you can guarantee you'll know where your compiler will put its binary data without delving into the details of the PE format.

I would suggest you create a binary resource in your executable that just contains the options you need. You can then load the values using the standard LoadResource calls.

When you need to update the resource, you can use the BeginUpdateResource, UpdateResource and EndUpdateResource functions to do so, without having to worry about copying and deleting your executable.

------------------------
Derek Waters
derek@lj-oz.com

Re: Write some short options into EXE

12-Sep-01 18:05

I HAVE done this before, a long time ago and remember having no end of problems with it, although at this point I would have to dig out the program to say exactly what they were. At this point in time, I would say it's a probably a very bad idea, and almost certainly unnecessary. (When I did it I was writing for the DOS platform, and we didn't have binary resources.)

Quite frankly doing anything with a running executable anymore is just asking for trouble. I have yet to find a "nice" way to delete a running executable from within it, let along anything more complex (Yes, I've seen numerous solutions to this problem, but they all smack of "dirty hacks" to me."

Assuming you're programming for Windows, resources ARE probably your best bet.

As far as binary resources go, I use a CFile derived wrapper class which encapsulates the Win32 resource handling calls and makes the resource(s) look just like disk files. Mine came out of a commercial code library (Dundas Ultimate Toolbox) but Code Project or Code Guru might have something similar (it's worth a look).

Probably not much help, but there it is... Smile | :)

Gamaliel Masters
"If I were to disprove 'I think, therefor I am', would I cease to exist?"

How to access Access Base in VC++6.0

12-Sep-01 3:27

Hello,

Where can i find information in order to access data in an
*.mdb file using a console application under VC++6.0.
(I will need I/O access).

Thanks for help.

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