C / C++ / MFC

Re: Launching Device Manager or manipulating device manager from C++

14-Aug-06 6:14

Maybe devmgr.dll has some exported functions (e.g., DeviceCreateHardwarePage()) that can be used.

http://www.experts-exchange.com/Programming/Q_20617785.html[^]

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Mike Dimmick14-Aug-06 14:22

Mike Dimmick

14-Aug-06 14:22

Driver Installation[^] on Windows Hardware Developer Central.

Stability. What an interesting concept. -- Chris Maunder

Command Line of a call to CreateProcess catchable?

Stone Free14-Aug-06 5:05

Stone Free

14-Aug-06 5:05

Hi,

I have a program that has a commandline option to pass a user and a password. If I start this program from within another windows program using CreateProcess, can dodgy types get hold of this commandline?

Re: Command Line of a call to CreateProcess catchable?

David Crow14-Aug-06 5:32

Re: Command Line of a call to CreateProcess catchable?

14-Aug-06 5:32

If it's a string literal, yes.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

bolivar12314-Aug-06 6:17

bolivar123

14-Aug-06 6:17

Someone could fairly easily view all the string literals in your .exe file. Alternatively they could replace the EXE that you are launching via CreateProcess and they could display the command line from their EXE.

Re: Command Line of a call to CreateProcess catchable?

Mike Dimmick14-Aug-06 14:28

Mike Dimmick

14-Aug-06 14:28

The Process Explorer[^] utility can show the command line that any process (to which you have access) was launched with. I think it does this by using the ReadProcessMemory API. By default, processes have ACLs (security settings) set so that only the creator of the process can use this API, but this behaviour can be overridden with use of the Debug privilege, which Administrators have by default - and as we all know, most people log in to Windows as a member of the Administrators group.

Stability. What an interesting concept. -- Chris Maunder

Question about "optimal" set up of VC++ 6 environment

ldsdbomber14-Aug-06 4:25

ldsdbomber

14-Aug-06 4:25

sadly I'm talking not about advanced compiling options but fonts, background colours and the like. I realise that this is something that probably comes over time as a personal preference, but wondered if anyone had any good links on a good start. I used to have one set up when I worked in programming with black background code windows and certain keywords all coloured in to make it easier to spot types and stuff.

I'm sure someone has good info, links or advice. gratefully received

cheers
Lee

Re: Question about "optimal" set up of VC++ 6 environment

David Crow14-Aug-06 4:59

Problem with using Image object in GDI+ (VC++)

14-Aug-06 4:59

I use the default with a few minor changes. Red/white for numbers; Blue/white for keywords; Green/white for comments; White/blue for string literals. Black/white for all else.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Dhananjayak0214-Aug-06 4:19

Dhananjayak02

14-Aug-06 4:19

Hi,

i needed to change the position and rotate a GIF image in given angles as per user inputs in a MFC application .

So I started to use Image object in GDI+.My intention was to make a Image object and manupulate its position and orientation.(As given in msdn page titled Drawing, Positioning, and Cloning Images - refer the link below)

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdicpp/GDIPlus/AboutGDIPlus/IntroductiontoGDIPlus/OverviewofGDIPlus.asp[^]

I tried to insert a image to my main frame using "Image" in GDI+. But a runtime error (unhandled exception) is occuring when im going to run the program.The details are as follows.

I have included "gdiplus.h" in StdAfx.h. There were no issues on that.But the problem started when i tried to insert a image using the guidelines given in above msdn link(.Drawing, Positioning, and Cloning Images - GDI+)

As per that method I used the following code:

CPaintDC dc(this);<br />
Graphics myGraphics(dc.m_hDC);<br />
<br />
Image myImage(L"robot.gif"); // this line creates the problem<br />
myGraphics.DrawImage(&myImage, 20, 10);

The program Built & compiled successfully in VC++ 6.0.But didn't run.It gaves a error.

When I insert that code to a .NET project the error message says that ;"Unhandled exception at 0x7c9105f8 in tttdk.exe: 0xC0000005: Access violation reading location 0x00000010."
When I break it , it shows the location of the error in the following cpp file.

D:\VS\VC\atlmfc\src\atl\atls\allocate.cpp

<small>..<br />
<br />
...<br />
<br />
CAtlTraceCategory *CAtlAllocator::GetCategory(int iCategory) const<br />
<br />
{<br />
<br />
if(iCategory == m_pProcess->CategoryCount())<br />
<br />
return NULL;<br />
<br />
<br />
<br />
ATLASSERT((iCategory < m_pProcess->CategoryCount()) || (iCategory == -1));<br />
<br />
CAtlTraceCategory *pCategory = NULL;<br />
<br />
if(iCategory >= 0)<br />
<br />
{<br />
<br />
BYTE *pb = reinterpret_cast(m_pProcess) + m_pProcess->MaxSize(); // this is the location of the error<br />
<br />
pCategory = reinterpret_cast(pb) - iCategory - 1;<br />
<br />
}<br />
<br />
return pCategory;<br />
<br />
}<br />
<br />
..............</small>

Please help me regarding the above matter ASAP.or else tell me way to Insert a GIF image to a MFC frame and to change its position and rotate by given angles time to time.

Thisara

ENTC
UoM

Mike_V14-Aug-06 4:28

Mike_V

14-Aug-06 4:28

Just a shot-in-the-dark:

Based on your code line alone:

BYTE *pb = reinterpret_cast<???>(m_pProcess) + m_pProcess->MaxSize();

Is MaxSize by any chance the fourth virtual method in m_pProcess? Do you have a memset(m_pProcess, 0, sizeof(...)) or equivalent somewhere? If so I think you are zeroing out the vtable. You can't use memset on a class with virtual methods.

Based on the code above that is the only thing I can think of that would make it crash.

---

Dhananjayak02 wrote:
The program Built & compiled successfully in VC++ 6.0.But didn't run.It gaves a error.

What error?

Mike

Dhananjayak0214-Aug-06 4:44

Dhananjayak02

14-Aug-06 4:44

Dear Mike,

Thank u very much for attending this matter.Actually I dont know what is error that comes when im runing the application.

There appears a window asking whether to send the error report to Microsoft. I tried to see the technical information in that report.But can't understand.It states about an exception. The appilication error states that the memory could not read at a location(memory address was given)

When I debug it following appeared..

Loaded symbols for 'D:\_Thisara\GDIplusProjectTDK\Debug\GDIplusProjectTDK.exe'
Loaded 'C:\WINDOWS\system32\ntdll.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\kernel32.dll', no matching symbolic information found.
Loaded symbols for 'C:\WINDOWS\system32\MFC42D.DLL'
Loaded symbols for 'C:\WINDOWS\system32\MSVCRTD.DLL'
Loaded 'C:\WINDOWS\system32\gdi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\user32.dll', no matching symbolic information found.
Loaded symbols for 'C:\WINDOWS\system32\MFCO42D.DLL'
Loaded 'C:\WINDOWS\system32\ole32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\msvcrt.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\advapi32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\rpcrt4.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.GdiPlus_6595b64144ccf1df_1.0.2600.2180_x-ww_522f9f82\GdiPlus.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\comctl32.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\uxtheme.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\version.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\shlwapi.dll', no matching symbolic information found.
Loaded 'C:\WINDOWS\system32\apphelp.dll', no matching symbolic information found.
The thread 0x620 has exited with code 0 (0x0).
The thread 0x9C8 has exited with code -1073741819 (0xC0000005).
The program 'D:\_Thisara\GDIplusProjectTDK\Debug\GDIplusProjectTDK.exe' has exited with code -1073741819 (0xC0000005).

ENTC
UoM

Mike_V14-Aug-06 4:57

Mike_V

14-Aug-06 4:57

Right - that is to be expected! That information says exactly the same thing as your OP.

> The thread 0x9C8 has exited with code -1073741819 (0xC0000005).

0xC0000005 is the code for an access violation. I refer you to my previous post - what is m_pProcess? One of your classes? Or a library class? If so, which library and what's its type? CProcess? Check to make sure you aren't memset-ing m_pProcess to zero anywhere.

Mike

To change the tray icon dynamically

Hamid_RT15-Aug-06 8:13

Hamid_RT

15-Aug-06 8:13

Is your problem solve?

WhiteSky

johnalek14-Aug-06 2:27

johnalek

14-Aug-06 2:27

plz kindly help me

#sanroop#

Re: To change the tray icon dynamically

Dave Calkins14-Aug-06 2:51

Dave Calkins

14-Aug-06 2:51

look at the Shell_NotifyIcon() API. You can add an icon, then later modify it using this API.

Anit Copy

Waldermort14-Aug-06 2:24

Waldermort

14-Aug-06 2:24

Hi all,

I have flicked through the examples here on CP but not really found what I want. I'm looking for code examples/thoughts/ideas on the following:

1. Self modifying code
2. Self detecting if exe has been copied
3. PC serial numbers (anything unique to a single computer)

Maybe it is impossible but I am trying to develop 'full version' exe that will revert back to a 'demo version' if copied to another machine.

David Crow14-Aug-06 3:37

14-Aug-06 3:37

waldermort wrote:
2. Self detecting if exe has been copied

Not possible as far as I know.

waldermort wrote:
3. PC serial numbers (anything unique to a single computer)

Even if you were to take the HDD's volume/serial number, what would happen if my HDD crashed and I got everything restored to a new HDD? The software would detect that something is different and stop working. I'm not sure how to effectively handle this.

"Money talks. When my money starts to talk, I get a bill to shut it up." - Frank

"Judge not by the eye but by the heart." - Native American Proverb

Joe Q14-Aug-06 4:56

Joe Q

14-Aug-06 4:56

waldermort wrote:
1. Self modifying code

You can do this in Assembly, which is more fun than C++ anyway.

Good luck with it

Joe Q

Max Santos14-Aug-06 10:51

Max Santos

14-Aug-06 10:51

waldermort wrote:
1. Self modifying code
2. Self detecting if exe has been copied

the only thing i can think of is using resources, reate some kind of CRC em embedd it in a resource (ex: image)

However this is easy to crack Frown | :(

waldermort wrote:
PC serial numbers (anything unique to a single computer)

Network card adapter number (MAC address)?
People could allways change the card from one PC to another, but the software only works wher the card is.