Re: How to bypass login window? - C / C++ / MFC Discussion Boards

Selvam R31-Dec-03 2:18

31-Dec-03 2:18

Hello,

HANDLE hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
SetConsoleTextAttribute(hStdOut, FOREGROUND_RED);

With Regards,
R.Selvam

Re: Need help with Dos App

RedDragon2k31-Dec-03 2:20

RedDragon2k

31-Dec-03 2:20

Thanks. Works great Smile | :)

Re: Need help with Dos App

Hauptman(n)31-Dec-03 8:42

Hauptman(n)

31-Dec-03 8:42

*plonk*

what you mean is a Win32 Console Application, not a DOS App Wink | ;)

scio me nihil scire
My OpenSource(zlib/libpng License) Engine:
http://sourceforge.net/projects/rendertech
Its incurable, its a Pentium division failure.

virtual printer driver

SHOJO31-Dec-03 2:05

SHOJO

31-Dec-03 2:05

I want to write a virtual printer driver.
The driver should be used from any print-dialog like any other printer which is installed on the system.
It should get the pages to print, change them and give them to the "real" printer.
Probably someone knows how to write such a driver an how to give the data further to the "real" printer.

Is this possible with Visual C++ and MFC? And how to make it?

I hope someone can answer me because there are very few things on this topic on the internet.

shojo

How to bypass login window?

SiddharthAtw31-Dec-03 0:11

SiddharthAtw

31-Dec-03 0:11

I want to develop a application which will connect me directly to yahoo messenger window(or any desktop application). i.e entering username and password in Login window will be handled by my application.
Any suggestions?

Re: How to bypass login window?

Monty²31-Dec-03 0:21

Monty²

31-Dec-03 0:21

It is only a wild guess

I would Install a System wide CBT Hook and wait for the creation of Yahoo Login window (will work definitly)

then as soon as the window is created Use SetWindowText to set the Text in the username window and Password (might work)

and then send the dialog a message for Button click (will work)

Hope it helps Smile | :)

Live as if your were to die tomorrow. Learn as if you were to live forever.
-Mahatma Gandhi

Re: How to bypass login window?

1-Jan-04 18:32

Till CBT hook I am clear.After that how to wait for yahoo login window. Situation is not clear to me rather idon't know how to do it

Re: How to bypass login window?

Monty²1-Jan-04 21:02

Monty²

1-Jan-04 21:02

SiddharthAtw wrote:
After that how to wait for yahoo login window

Check for the creation of login window in CBT Hook procedure
Use the Classname of Login window.

Live as if your were to die tomorrow. Learn as if you were to live forever.
-Mahatma Gandhi

How to enumerate all users from Windows?

Butnariu30-Dec-03 23:42

Butnariu

30-Dec-03 23:42

I need to get all users information from my windows system.
not only the users from local domain
I want to be able to see users from other domains who have rigths on my machine to indentify the privileges.
I used NetEnumUsers API but this function return only users from local domain Frown | :(

Anyone can help?

Re: How to enumerate all users from Windows?

valikac31-Dec-03 5:36

valikac

31-Dec-03 5:36

One solution is NetUserEnum().

Kuphryn

VC++ : linking problems

Vincent Sim30-Dec-03 21:40

Vincent Sim

30-Dec-03 21:40

hi everybody,
I am doing one C++ programming and facing some problems.

Linking...
msvcrtd.lib(crtexe.obj) : error LNK2001: unresolved external symbol _main
matlabwizard.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

can anyone please help me to solve this problem?
thank you very much.

HAPPY NEW YEAR 2004 ~!

vincent sim

Re: VC++ : linking problems

Balkrishna Talele30-Dec-03 22:13

Balkrishna Talele

30-Dec-03 22:13

Hopefully you have done the following stuff

1) file->new->Win32 Application
Ans : use Win32 Console Application, this will solve your problem

if this is not the story, feel free to reply!!!
regards
Balkrishna Talele

Difference of Floating Point Optimization in Fortran & C++

APV30-Dec-03 21:35

APV

30-Dec-03 21:35

Hi Everyone

This is very urgent. The problem which we are facing in our project is related to the floating point optimizations performed in VC++. The following code snippet elaborates this:

program main
double precision::a,b,x
a = 1.D0
b = 0.1
x = a/b
write(*,*) x
end program main

The above program construct in Fortran stores b as 0.100000001490116 & computes x as 9.99999985098839.

The same equivalent construct in C++ with double variables stores b as 0.10000000000 & computes x as 10.00000000000.However if we declare b as float we get similar results(but our project can’t use floats).

The difference in the results is attributed to the fact that C++ perhaps performs some optimizations to store values of type 1/10 1/100 etc.Hence gives expected results.

Our project requires similarity in results across Fortran & C++.Also we are only free to make changes in the C++ code.We have tried few things in this regard like /Op switch, _control87 & _controlfp.routines with different arguments but couldn’t resolve the problem.

What is required precisely is that the following code segment should assign x the value 9.99999985098839 & that too there should be some global setting sort of thing in VC environment as the code spans around 3 lakh lines which makes it difficult to make changes everywhere.

Void main(void)
{
double a,b,x;
a = 1.0;
b = 0.1
x = a/b;
}

Any help in this regard will be highly appreciated.

Thank you.

-apv

Re: Difference of Floating Point Optimization in Fortran & C++

PJ Arends30-Dec-03 21:51

PJ Arends

30-Dec-03 21:51

In C/C++ a float data type uses 4 bytes to store the number, and IIRC has an accuracy of 6 decimal points, so any digits after that are subject to inaccuracy. A double data type uses 8 bytes to store the number, and has an accuracy of 15 decimal points.

I would assume that the fortran code you are using is generating 4 byte floating point numbers, which is why you are getting the same inaccurate numbers as the float type is giving you.

Sonork 100.11743 Chicken Little

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

Within you lies the power for good - Use it!

Re: Difference of Floating Point Optimization in Fortran & C++

Ted Ferenc30-Dec-03 21:53

Ted Ferenc

30-Dec-03 21:53

apv wrote:
floating point optimizations

In FORTRAN, that brings back memories!!! All I could suggest is look for a freeware maths library that defines it's own double "variable". I know there are lot's out there hopefully there will be one that will work for both FORTRAN and C and will give identical results.

But someone may come up with a compiler switch, but I doubt it. The other alternative is to work in long integers and convert to double at the end, but beware of overflows.

"The greatest mistake you can make in life is to be continually fearing you will make one." - Elbert Hubbard

Re: Difference of Floating Point Optimization in Fortran & C++

markkuk30-Dec-03 22:59

markkuk

30-Dec-03 22:59

It's been about 20 years since I did FORTRAN, but I think that floating point literals (like 0.1) are single precision by default in FORTRAN but double precision in C/C++. This causes the difference in value of "b" and "x". There may be a compiler switch to change that.

MFC with 2 views using Doc/View style

R. Thomas30-Dec-03 20:58

R. Thomas

30-Dec-03 20:58

hi..
i am makigna mfc app Doc/View style..
i ahve two views...
now normally the two views are white in color...
what if i want them to be permanently black??
what do i change in my app to make bothe the views black forever...so that whatever i draw on it will be like drawing on a black background...
can someon pls help...
tks a lot...

"Rejoice always, pray without ceasing, in everything give thanks; for this is the will of God in Christ Jesus for you."1Thess. 5:16-18

Re: MFC with 2 views using Doc/View style

Monty²30-Dec-03 21:17

Monty²

30-Dec-03 21:17

Derive OnEraseBackground in ur views

BOOL YOUR_SNAZZY_VIEW::OnEraseBkgnd(CDC* pDC)
{
CRect rc;
GetClientRect(&rc);
pDC->FillSolidRect(&rc,RGB(0,0,0));
return TRUE;
}

(PS: Get A Good MFC Book) Poke tongue | ;-P

Live as if your were to die tomorrow. Learn as if you were to live forever.
-Mahatma Gandhi

Re: MFC with 2 views using Doc/View style

R. Thomas1-Jan-04 15:56

R. Thomas

1-Jan-04 15:56

tks

"Rejoice always, pray without ceasing, in everything give thanks; for this is the will of God in Christ Jesus for you."1Thess. 5:16-18

Query in Microsoft Installshield for VC++

bhargav_ram30-Dec-03 20:34

bhargav_ram

30-Dec-03 20:34

hi ,

We are creating a setup for our APPLICATION using Microsoft Install Shield for VC++.

Our application has

(a) 6 MFC and SYSTEM Dlls which are shared(the target system may or may not have the MFC Dlls).
(b) 4 ocx components(one "msflxgrd.ocx" and three developed by us, so the target system has may have the "msflxgrd.ocx" or may not)
The rest of the components have to be registered and we have done them successfully.

(c) 3 dlls which required to be registered.
(d) Few more Dlls and exe(s) required for our application.
I have built my InstallShield on the Windows XP system.

Queries:

1. Do i need to use separate Dlls(SYSTEM Dlls) for Different OS during the build as my application was not being able to find the "msvcrt.dll" on the target Windows 98 machine.
2. How can i remove (during uninstallation) the registry entries created by our own components while installing.
3. We are copying all the Dlls and OCX components to the "system32" folder which have to be registered. These components should not overwrite(or) show a message "component already exists on the target system.
Do you want to overwrite existing?".( i have seen this option in few application(s) setup(s).How do i get this using MS Install Shield.

Thanks and Regards

ShellExecute or WinExec!!

abc87630-Dec-03 20:19

abc876

30-Dec-03 20:19

I am trying to call ShellExecute or WinExec in my Win NT service application.
When i am running it as simple win32 application, both of the functions executes well but when it is run as service under LocalSystem account, both of them dont work. what to do???

How can i execute another .exe file from current program????

Muhammad Shoaib Khan
http://geocities.com/lansolution

Re: ShellExecute or WinExec!!

Robert Kuster31-Dec-03 1:17

Robert Kuster

31-Dec-03 1:17

> I am trying to call ShellExecute or WinExec
> in my Win NT service application.
> ... both of them dont work.

ShellExecute and WinExec both work fine and your process gets created. You just don't see the window of your application because it's on a wrong desktop. To modify this tell your service to be interactive:

Administrative Tools > Component Services > Services (local) >
> double click your service > Tab: "Log On" > Check: "Allow service to interact with desktop"

Although you will see the application now, it will still run under the local System account (often unwanted). To modify this behaviour use CreateProcessAsUser rather than ShellExecute or WinExec:

STARTUPINFO si;
PROCESS_INFORMATION pi;
 
si.cb = sizeof(STARTUPINFO);
si.lpReserved = NULL;
si.lpTitle = NULL;
si.lpDesktop = "WinSta0\\Default";
si.dwX = si.dwY = si.dwXSize = si.dwYSize = 0L;
si.dwFlags = 0;
si.wShowWindow = SW_SHOW;
si.lpReserved2 = NULL;
si.cbReserved2 = 0;
 
CreateProcessAsUser(hToken,NULL, szMyApp, NULL, NULL, FALSE,
		    0, NULL, NULL, &si, &pi);
CloseHandle(pi.hThread);
CloseHandle(pi.hProcess);

How to get the security token of a logged-on user? There are several ways, but I usually simply *steal* it from explorer.exe (via OpenProcessToken). As an example check the nRunAsLoggedOnUser function here[^] (=some handy service helper routines from CISCO).

RK Smile | :)

help in an active x control

safee ullah30-Dec-03 18:51

safee ullah

30-Dec-03 18:51

hi there..

thanks for your time..

i needed to know if its possible to know if a control is UI Activated already or not? and secondly which function is called when a control is UI DeActivated?

regards
safee

Deployment of project

Ming Yan30-Dec-03 18:19

Ming Yan

30-Dec-03 18:19

Hi...

I'm currently trying to creat an installer for distribution of my project. A setup project has been created for the purpose.

But the problem is that I dont want the registry setting for the application to be overwritten if the application already exist in the computer. Only d necessary upgrades will be updated to the old program.

Can anybody give me a clue on how to get it done?

Thank you

Re: Deployment of project

Monty²30-Dec-03 18:39

Monty²

30-Dec-03 18:39

What installer program have you used ?
The installer programs generally have an option where you could tell it NOT to overwrite registry entries.

if urs don't have that option , don't make the entires in the installer instead make them from ur program which will be in a position to check for already made entries in registry

Live as if your were to die tomorrow. Learn as if you were to live forever.
-Mahatma Gandhi

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