C / C++ / MFC

Re: How to launch an executable directly from memory?

12-Dec-01 9:22

Well, seems what you intend is feasible in principle. The idea is to create a virtual memory area allocated, commited and given execution access with VirtualAlloc(...,MEM_COMMIT,PAGE_EXECUTE_READWRITE), copy the data there and jump into it (this last part might become tricky IMHO). Do a search on Usenet for "VirtualAlloc PAGE_EXECUTE", lots of information about this issue, though none conclusive.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

John Osborn12-Dec-01 13:26

John Osborn

12-Dec-01 13:26

Yes, it does look pretty tricky. The system apparently creates a process kernal object, then a 4-GB address space for the process, and maps the exe file into the address space. Then it calls LoadLibrary on each of the dlls listed in the exe file and does some address fixups when necessary. In short, this is quickly becoming very complicated. What I need is something like a CreateProcess that takes a memory address instead of a filename. Or, maybe even better, a way to create a virtual disk drive in memory and just do a file copy to the virtual drive and use CreateProcess or ShellExecute. Have you heard of any virtual disk drive programs for Win2000? I know that they are available for MS-DOS.

Is it possible to change bmp in executable

SAK12-Dec-01 7:36

SAK

12-Dec-01 7:36

I have a program installed where I need to change one of the toolbar images. All I have is the executable, I believe it is possible to extract resources from an executable but is it possible to modify these resources (in the case of the tool bar bmp).

Regards,

SAK

Re: Is it possible to change bmp in executable

Rick York12-Dec-01 7:58

Rick York

12-Dec-01 7:58

You can open the executable with Visual C++, select open as resources, and then edit the toolbar bitmaps.

I just tried it. Smile | :)

Re: Is it possible to change bmp in executable

Ernest Laurentin12-Dec-01 7:59

Ernest Laurentin

12-Dec-01 7:59

Look at these functions:

BeginUpdateResource<br />
UpdateResource<br />
EndUpdateResource

Good luck!

Re: Is it possible to change bmp in executable

Alvaro Mendez12-Dec-01 8:06

Alvaro Mendez

12-Dec-01 8:06

If you're looking for a tool for the job, ResourceHacker is probably the best one out there.

Regards,
Alvaro

Problem with ActiveX

12-Dec-01 7:00

Hi all,

I implemented an ActiveX which runs fine in Debug mode.
When I compiled the project in Release mode, I got this
error message "Can't execute program".

Apparently, after the compilation process, the
myApp::InitInstace() is called which in turn calls

STDAPI DllRegisterServer(void)
{
AFX_MANAGE_STATE(_afxModuleAddrThis);

if (!AfxOleRegisterTypeLib(AfxGetInstanceHandle(), _tlid))
return ResultFromScode(SELFREG_E_TYPELIB);

if (!COleObjectFactoryEx::UpdateRegistryAll(TRUE))
return ResultFromScode(SELFREG_E_CLASS);

return NOERROR;
}

for some wild reason, It trys to run something after InitInstance.
The DllRegisterServer() function returns NOERROR.
I tried this on the command line, still got the same error:
c:>regsvr32 myActx.ocx

Does anyone know why?
Eek! | :eek:

Thanks

Ernest Laurentin12-Dec-01 8:32

Ernest Laurentin

12-Dec-01 8:32

Try to register it with: (menu command) Tools->Register Control
or
Try to execute it from the activex control container tool
or
You still can debug it Release, goto: Project->Settings
C/C++ Tab:
Optimizations: Default
Debug Info: Program Database for Edit and Continue

Link Tab:
[x] Generate Debug Info

Good luck!

13-Dec-01 5:38

Thanks Ernest,
Debugging the release version won't help.
I register the activex on the command line as follows:

c:>regsvr32.exe myActX.ocx

The result was successfull. Right after that, regsvr32
trys to run something else. Then the MsDev pops up along
with the popup window with the error message:

"Cannot execute program"

It only happens when I try to build a release version.
The strange thing is It never happens in debug version Confused | :confused:

don't know why
Confused | :confused:

Ernest Laurentin13-Dec-01 5:51

Ernest Laurentin

13-Dec-01 5:51

Can you see your control with the "ActiveX Control Container Test" program?
"Microsoft Visual Studio\Common\Tools\tstcon32.exe". If it works, your problem
is caused by something else. And check carefully the path of the control.
click "New control" toolbar button.

13-Dec-01 6:19

Yes, I can see the ActiveX control in "ActiveX Control Container Test".
It works and the path of the control is also correct.

The client test program is also working. The regsvr32.exe does
install/uninstall the ActiveX. The BUG (perhaps not a good choice of word
for today Poke tongue | ;-P

) appears right after install/uninstall the ActiveX.

Thanks for your inputs.

Runtime video Codec chose

14-Dec-01 4:20

Problem solved !
Poke tongue | ;-P

12-Dec-01 6:47

I'm developing a custom application to Capture Sequences.
I'm using Videofor Windows Macro to capture sequences.
I'm istalled a matrox Marvel G450eTv.
I Need to select runTime,before capture startes, the videoCompression to use:I know that there is the capDlgVideoCompression macro....but this is not good for my application.I need to select video Compression Through a different method such as special functions or silmilar solutions.
anybody know how can I do this???
thanks
DIEGO

Re: Runtime video Codec chose

Un114-Apr-02 4:22

Un1

14-Apr-02 4:22

Select codec by it's name in silence:

VidCap1.Compressor = "h263"

http://www.banasoft.net/AVPhone.htm

Cool | :cool:

How to tell it's a text file or a rich text file in CRichEditView?

davilism12-Dec-01 6:31

davilism

12-Dec-01 6:31

Hi, all, I want to read text files for processing in my CRichEditView text editor. If I don't set the attribute m_bRTF to FALSE when loading, it can't read other text files besides my own. How to test for other text files?

Re: How to tell it's a text file or a rich text file in CRichEditView?

Bill Wilson12-Dec-01 12:43

Bill Wilson

12-Dec-01 12:43

rtf files are, of course, text files. There is nothing absolutely definitive. There are some 99.9999% tests you can use.

Here is a sample of an rtf file. (it contains a string of 10 "a" characters. you could check for some of the first chars maybe "{\rtf" would be specific enough and yet general enough for all versions. I don't know if there are files with {\rft0 or {\rtf2.

{\rtf1\ansi\ansicpg1252\uc1 \deff0\deflang1033\deflangfe1033{\fonttbl{\f0\froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman{\*\falt Times};}{\f55\froman\fcharset238\fprq2 Times New Roman CE{\*\falt Times};}
{\f56\froman\fcharset204\fprq2 Times New Roman Cyr{\*\falt Times};}{\f58\froman\fcharset161\fprq2 Times New Roman Greek{\*\falt Times};}{\f59\froman\fcharset162\fprq2 Times New Roman Tur{\*\falt Times};}
{\f60\froman\fcharset186\fprq2 Times New Roman Baltic{\*\falt Times};}}{\colortbl;\red0\green0\blue0;\red0\green0\blue255;\red0\green255\blue255;\red0\green255\blue0;\red255\green0\blue255;\red255\green0\blue0;\red255\green255\blue0;
\red255\green255\blue255;\red0\green0\blue128;\red0\green128\blue128;\red0\green128\blue0;\red128\green0\blue128;\red128\green0\blue0;\red128\green128\blue0;\red128\green128\blue128;\red192\green192\blue192;}{\stylesheet{
\nowidctlpar\widctlpar\adjustright \fs20\cgrid \snext0 Normal;}{\*\cs10 \additive Default Paragraph Font;}}{\info{\title sfdsdfsdsdfsdff}{\author WilsonB5}{\operator WilsonB5}{\creatim\yr2001\mo12\dy12\hr15\min41}{\revtim\yr2001\mo12\dy12\hr15\min42}
{\version2}{\edmins0}{\nofpages1}{\nofwords0}{\nofchars0}{\*\company  }{\nofcharsws0}{\vern71}}\widowctrl\ftnbj\aenddoc\formshade\viewkind4\viewscale110\pgbrdrhead\pgbrdrfoot \fet0\sectd \linex0\endnhere\sectdefaultcl {\*\pnseclvl1
\pnucrm\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl2\pnucltr\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl3\pndec\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl4\pnlcltr\pnstart1\pnindent720\pnhang{\pntxta )}}{\*\pnseclvl5
\pndec\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl6\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl7\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl8\pnlcltr\pnstart1\pnindent720\pnhang
{\pntxtb (}{\pntxta )}}{\*\pnseclvl9\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}\pard\plain \nowidctlpar\widctlpar\adjustright \fs20\cgrid {aaaaaaaaaa
\par }}

Hope this helps,
Bill

Insert property page after pr.-Sheet created?

Thomas Blenkers12-Dec-01 6:25

Thomas Blenkers

12-Dec-01 6:25

Hi folks,

my newest, coolest Smile | :)

app uses a property sheet to expose some settings. Due to an action in one page (or s.th. like apply button in the sheet itself) I'd like to insert/remove an other property page.

I'd be good also if there is some way to hide (and display) a property page ...

Thanks for your help!
Thomas

Joaquín M López Muñoz12-Dec-01 6:37

12-Dec-01 6:37

Well, if the property sheet inserted/removed is always the last one, you can get by using AddPage and RemovePage, but I guess you had already figured that out...

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Thomas Blenkers12-Dec-01 10:29

Thomas Blenkers

12-Dec-01 10:29

Joaquin,

thank your for your quick suggestion Rose | [Rose]

. The page in question *is* the last one on the sheet, but it won't work:

CMyPropertySheet::OnSomeMessage(......)
{
RemovePage(&m_myPage);
AddPage(&m_myPage);
}

The RemoveMessage function destroys the property page, and AddPage isn't enough to have the page created: I get an empty property sheet, all controls on it are not visible/created Cry | :((

Joaquín M López Muñoz12-Dec-01 11:42

12-Dec-01 11:42

mumble mumble... Maybe you should use a fresh CPropertyPage each time, like this:

CMyPropertySheet::OnSomeMessage(......)
{
  // Now m_pMyPage is a pointer to CMyPropertyPage instead of a CMyPropertyPage
  RemovePage(m_pMyPage);
  delete m_pMyPage;
  m_pMyPage=new CMyPropertyPage();
  AddPage(m_pMyPage);
}

Why don't you try this and tell us if it works? Smile | :)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Reading and writing a open CFile with fread fwrite,...?

Thomas Blenkers14-Dec-01 1:31

Thomas Blenkers

14-Dec-01 1:31

Joaquín,

thank you, that was the right trick. Once the property page has been created (OnInitDialog is done) you cannot RemovePage it and reuse the same object instance.
Thomas

Patrick Hoffmann12-Dec-01 6:20

Patrick Hoffmann

12-Dec-01 6:20

Hi folx!

I have a huge problem: On the one hand I have a open CFile object and on the other hand I have a library that decodes data from and encodes data into files with fread/fwrite aso.

So for a short example the following code fragment should be enough to imagine this...

CFile file("FileName",CFile::modeRead);

FILE *stream = ... // <- what do I have to write to convert a CFile into a FILE* ???

fread( buffer, size, count, stream );

.
.

Same in writeing a file!

I would be very lucky, if someone has an idea, what I can do! Big Grin | :-D

(Best Regards,)

Patrick Hoffmann

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Re: Reading and writing a open CFile with fread fwrite,...?

Joaquín M López Muñoz12-Dec-01 6:29