C / C++ / MFC Discussion Boards

Philip Patrick5-Jan-02 0:23

5-Jan-02 0:23

Look in the code of the IconPro sample from Platform SDK. There is a file that is working with DIBs (dib.c)
Also look here in this article: DibSection
And, you can find a lot of info in "Bitmaps and Palettes" section here, on CodeProject

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: .dib file

Neha5-Jan-02 0:33

Neha

5-Jan-02 0:33

Thanks for the reply.
But i feel .dib &.bmp are same in windows.
If i write
HANDLE hImage = ::LoadImage (AfxGetInstanceHandle(), "d:\\winnt\\prescan3.BMP", IMAGE_BITMAP, 0, 0,
LR_LOADFROMFILE );
I will hImage as NULL.
Why is it so?

Re: .dib file

Philip Patrick5-Jan-02 0:43

Philip Patrick

5-Jan-02 0:43

Try to put NULL instead of AfxGetInstanceHandle()
This should help, cause when you are loading from file you do not need the Instance handle

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: .dib file

Neha5-Jan-02 1:06

Neha

5-Jan-02 1:06

It works with all other bmp file.But it doesn't work with the file which i renamed from .dib to .bmp.
Any idea?

Re: .dib file

Philip Patrick5-Jan-02 1:27

Philip Patrick

5-Jan-02 1:27

Did you try to open the file with other utilities? Such an IrfanView, or simple Word?
And if you can, can you send me that .dib file, so I'll play with it?

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: .dib file

Philip Patrick5-Jan-02 1:40

Philip Patrick

5-Jan-02 1:40

Also, look at DIBLOOK sample in your MSDN. This project supposed to open DIB files as well as BMP file. If it is not, so your .dib is corrupted Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

What infected the exe ?

ColinDavies4-Jan-02 20:11

ColinDavies

4-Jan-02 20:11

Explanation,
I have some code that runs in a toplevel windows position,
This code never-the less appears to get infected and corrupted by virri on occasions.
So I do a couple of CRC checks on the apps initiation to verify if the existing code is also infected.
for-example:

if( code_infected() ) { Error_message(); Exit(); }
else RunTheApp();

Ok simple enough eh! Smile | :)

My question is how can I detect what was the malware/nasty that infected my App ?

Note all the code is in one exe.

I could spawn a process that monitors the app, but this would be liable to be infected as well.

Any help welcome ! Thanks. Smile | :)

Regardz
Colin J Davies
Sonork ID 100.9197:ColinI live in Bob's HungOut now
A good example of "Fully Managed" coding

Re: What infected the exe ?

Philip Patrick5-Jan-02 1:53

Philip Patrick

5-Jan-02 1:53

Look for CheckSumMappedFile() in your MSDN. You'll find there all about executable files images Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: What infected the exe ?

Michael Dunn5-Jan-02 5:39

Michael Dunn

5-Jan-02 5:39

There's an unused field in the PE header that you can use to store a checksum of the file. You would use or write a checksumming program and run that on your app, and that program would store the checksum in the PE header. Then your code_infected() routine would use the same algorithm to compute the checksum and compare the two.

--Mike--
My really out-of-date homepage
Buffy's on. Gotta go, bye!
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

Re: What infected the exe ?

Todd Smith5-Jan-02 9:50

Todd Smith

5-Jan-02 9:50

What if it's a smart virii that modifies the checksum field?

Todd Smith

Re: What infected the exe ?

Michael Dunn5-Jan-02 10:00

Michael Dunn

5-Jan-02 10:00

A virus that analyzes the host program, locates the checksumming algorithm, runs it against itself, and saves & verifies a new checksum? Not likely. Wink | ;)

--Mike--
My really out-of-date homepage
Buffy's on. Gotta go, bye!
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

Re: What infected the exe ?

Mustafa Demirhan5-Jan-02 14:56

Mustafa Demirhan

5-Jan-02 14:56

Well, what if the target application is a crack program. Then it would be very very easy to crack the program. Poke tongue | ;-P

I think Colin is trying to protect an application from the crackers. If so, you should choose a third-party library. Here is a good one.http://www.bit-arts.com/ It is really expensive, but if you use ChargeKey service to sell your software, they provide these programs for free. Have a look at it.

Kind regards
Mustafa Demirhan

http://www.macroangel.com

Sonork ID 100.9935:zoltrix

sybase procedure to be called from vc++

Anusha4-Jan-02 18:05

Anusha

4-Jan-02 18:05

I have a procedure in sybase which has to be executed
in frontend thru VC++...So, how do u go abt it...! Right now i
have used DBGrid Control to access my info in the frontend...as per my understanding...!Or is there any other way to spool the info of the stored procedure....?I just have to see the data in the stored procedure ,excuted in the front end...!

plz help Frown | :(

Variable address issues

Stew4-Jan-02 16:12

Stew

4-Jan-02 16:12

I re-worked one of my functions today and for some reason, all of the new variables that I create share the same address and, therefore, share the same data. It's causing some issues with the handling of the application and I've never seen anything like this before. Does anyone have any ideas as to how this could happen or how I could fix it?

Re: Variable address issues

Philip Patrick5-Jan-02 0:17

Philip Patrick

5-Jan-02 0:17

Post the code here, so someone will answer more correctly.
It is something in your code, check assignments. Also are this variables pointers or not?
IS, post the code here Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Re: Variable address issues

Stew5-Jan-02 6:40

Stew

5-Jan-02 6:40

Here is the code:

CString OffensiveBackfield;

if (true)
{
int ItemIndex;
CString Subheading;
CString SubheadingNumber;
bool SubheadingAdded = false;

//Populate the dialog item drop down lists with the position names
NumFormations = pApp->GetProfileInt("Offensive Backfield Formations\\Formations", "NumFormations", 0);
if (NumFormations > 0)
{
for (int j = 3; j < 6; j++)
{
for (i = 1; i <= NumFormations; i++)
{
_itoa( i, buffer, 10 );
FormationRegName = pApp->GetProfileString("Offensive Backfield Formations\\Formations", "Formation" + (CString)buffer);
NumReceivers = pApp->GetProfileInt("Offensive Backfield Formations\\Formations", "WR" + (CString)buffer, 0);
if (NumReceivers == j)
{
if (!SubheadingAdded)
{
_itoa(j, SubheadingNumber.GetBuffer(0), 10);
strcat(SubheadingNumber.GetBuffer(0), " Wide Receivers");
Subheading = SubheadingNumber;
ItemIndex = pOffensiveBackfieldBox->AddString(Subheading);
pOffensiveBackfieldBox->SetItemData(ItemIndex, 0);
SubheadingAdded = true;
}
TildeCheck = FormationRegName.Find(" ~ ");
if (TildeCheck != -1)
{
FormationName = FormationRegName.Left(TildeCheck);
}
else
{
FormationName = FormationRegName;
}
ItemIndex = pOffensiveBackfieldBox->AddString(FormationName);
pOffensiveBackfieldBox->SetItemData(ItemIndex, 1);
}
}
SubheadingAdded = false;
}
}
}
if(OffensiveBackfield != "")
{
pOffensiveBackfieldBox->SelectString(0, OffensiveBackfield);
}

For some reason, the variables "Subheading", "SubheadingNumber", and "OffensiveBackfield" all have the same address associated with them. After the line "_itoa(j, SubheadingNumber.GetBuffer(0), 10);", all three of the variables have the same data in them. This is not how it should be and I'm wondering how this is happening.

Re: Variable address issues

Michael Dunn5-Jan-02 6:58

Michael Dunn

5-Jan-02 6:58

Stew wrote:
_itoa(j, SubheadingNumber.GetBuffer(0), 10);
strcat(SubheadingNumber.GetBuffer(0), " Wide Receivers");

You have two problems there. First, you're allocating a buffer of length 0, so the _itoa() and strcat() calls are overrunning the buffer. Second, you're not calling ReleaseBuffer(). Do something like:

LPTSTR pszBuff = SubheadingNumber.GetBuffer(16);  // use a size big enough to hold the largest number you expect to have
 
  _itoa ( j, pszBuff, 10 );
  SubheadingNumber.ReleaseBuffer();  // return control of the char buffer to the CString
  SubheadingNumber += _T(" Wide Receivers");

--Mike--
My really out-of-date homepage
Buffy's on. Gotta go, bye!
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan.

Re: Variable address issues

Philip Patrick5-Jan-02 9:11

Philip Patrick

5-Jan-02 9:11

Oh, I'm late, LMAO, Well, Michael told ya already Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

help

DanYELL4-Jan-02 13:51

DanYELL

4-Jan-02 13:51

Can someone help me with a demo project? I have two (2) edit boxes. When I type something in one edit box I want the other edit box to instantaneously update. However, if I keep typing information, new information is typed on top of old information. It looks awful. I tried

m_edit0 = name;

GetDlgItem(IDC_EDIT0)->Invalidate();
GetDlgItem(IDC_EDIT0)->UpdateWindow();

and alot of other things, but nothing makes it work correctly. Please, please, can I email a demo project that illustrates this error and hopefully, someone will be able to help me fix it?

My email address is brinasas@yahoo.com

Sincerely,
Danielle (an overworked graduate student)

Re: help

Eugene Pustovoyt4-Jan-02 18:26

Eugene Pustovoyt

4-Jan-02 18:26

Hi Danielle,

Just try follows:

GetDlgItem(IDC_EDIT0)->RedrawWindow();

Should help!

Best regards,
Eugene Pustovoyt

Smile | :)

Sonork ID 100.10002:Yaumen

grrr ComboBox design-time item adding problem

Kuniva4-Jan-02 12:13

Kuniva

4-Jan-02 12:13

I have a ComboBox on my Dialog. I want to put items in it that aren't supposed to change so i open its properties and i type in the items seperated by CTRL+RETURN which takes me to the next line. For some reason the items dont show in the ComboBox when i run the dialog. (the dialog is called from another dialog with DoModal() ).

Can anyone think of a reason why the items wont show???? (i tried all different combinations of the properties, i tried changing the style and Owner draw and everything else so its not that)

Kuniva
--------------------------------------------
God gave man a penis and a brain but not enough blood to make both of 'em work at the same time.

Re: grrr ComboBox design-time item adding problem

Philip Patrick5-Jan-02 0:25

Philip Patrick

5-Jan-02 0:25

Maybe you are calling ResetContent() somewhere in your OnInitDialog()? Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Accessing Interface of OCX...

Tim Rymer4-Jan-02 9:58

Tim Rymer

4-Jan-02 9:58

How do I access a MFC ActiveX .OCX interface in VC that was created in VC?

Thanks in advance...

~Timothy T. Rymer

www.digipen.edu
tim.xpertz.com

Re: Accessing Interface of OCX...

Philip Patrick5-Jan-02 0:31

Philip Patrick

5-Jan-02 0:31

Assuming that CLSID_ISomeInterface is the class id of interface you want to access, so the code of getting it should be like this:

ISomeInterface* pInterface = NULL;
CoCreateInstance(CLSID_ISomeInterface, NULL, CLSCTX_INPROC_SERVER,
                 IID_ISomeInterface, (void**)&pInterface );

the pInterface will contain your interface.
But the code can be different for different ActiveXs. If you want to know exactly, tell what interface you want to access.
Smile | :)

Philip Patrick
"Two beer or not two beer?" (Shakesbeer)
Web-site: www.saintopatrick.com

Blocking calls in worker thread

Jacob L. Anawalt4-Jan-02 9:02

Jacob L. Anawalt

4-Jan-02 9:02

I am trying to write a simple dialog based multi-threaded app that has a worker thread doing blocking socket reads from a non windows server (no serialization) and updating progress controlls on the dialog window (like an ftp app).

I first tried following the MFC examples, deriving my thread class from CWinThread. This runs, but doesn't work correctly. Windows messages, like scrolling, are blocked at times to all applications (not just my app). I tried setting the thread priority to the lowest, but still had problems with blocking. I guessed this was due to the thread being derived from CWinThread and having message maps, but unfortunatly the VC help files I found only talked about making worker threads from functions.

I searched and found a CThread class here on codeproject.com, and I switched my code over, deriving my worker class from the CThread class and eliminating the message maps for my worker thread (which I guess was realy a UI thread). Still the problem presents itself.

Any pointers to a multi-threaded application that updates a user interface with status progress while doing blocking work with another thread, or any other suggestions would be greatly appreciated.

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