COM Problem, I think - C / C++ / MFC Discussion Boards

Any Vector graphics lib?

xiao216-Jan-03 17:58

xiao2

16-Jan-03 17:58

Can any one suggest a good Vector Graphic library?
better open source

Thanks!

Re: Any Vector graphics lib?

Mike Nordell17-Jan-03 23:48

Mike Nordell

17-Jan-03 23:48

SVG. Try googling for "libSVG" and you'll probably find something.

How to use WIN32 static library!

tongc16-Jan-03 17:09

tongc

16-Jan-03 17:09

Hi

I have successfully built a Win32 Static library. I test this by adding the *.lib name to my link option in the project setting but when i try to use the class in the library in the test program, it always give me errror say "Undeclare identifier" whether i know firmly that it is nothing wrong with the declaration. I know that the linking process is ok, but what else did i miss ??

Regard,

Re: How to use WIN32 static library!

Taka Muraoka16-Jan-03 17:40

Taka Muraoka

16-Jan-03 17:40

Post the exact error message you're getting and if it's referring to a line in your program, that bit of code as well.

he he he. I like it in the kitchen! - Marc Clifton (on taking the heat when being flamed)

Awasu v0.4a[^]: A free RSS reader with support for Code Project.

Re: How to use WIN32 static library!

HENDRIK R17-Jan-03 0:40

HENDRIK R

17-Jan-03 0:40

Hello,

you have to include the header file where you declared your class you want to use everywhere you plan to use that class. This is needed to make the class known to your application.

plz. help rectify LogonUser(...) ImpersonateUser problem

r i s h a b h s16-Jan-03 16:43

r i s h a b h s

16-Jan-03 16:43

dear all,
i'm using Windows Xp pro with NTFS partition.
i've used LogonUser to get a token of a user and then I use the token in CreateProcessAsUser(...). I use flag LOGON32_LOGON_INTERACTIVE SO THERE IS NO NEED TO DUPLICATE THE TOKEN.
I've also set the reqd. previliges in the system.
but still when i try to execute a process, i get an error -> Access Denied (5).

I also tried to use function ImpersonateLoggedOnUser(..) (which was successful) but still I get the same Error while using function CreateProcessAsUser(...) after using ImpersonateLoggedOnUser(...) and the process is not executed.
I've even tried setting priviliges by code and manually in the OS
But still I found the same Error (error number 5).

In VB also i get the same problem. Confused | :confused:

is it a bug!!!!!!!!!!! Suspicious | :suss:

any ideas!!!!!!!!!

thanx,

<marquee>rishabhs<marquee>

Re: plz. help rectify LogonUser(...) ImpersonateUser problem

r i s h a b h s16-Jan-03 21:28

r i s h a b h s

16-Jan-03 21:28

plz...............................................
respond

COM Problem, I think

Nick Parker16-Jan-03 15:40

Nick Parker

16-Jan-03 15:40

I'm not even sure where to begin, I highlighted in red the section where I believe it blows up....

#import "Tester.tlb"

using namespace Tester;

class CTestDlg : public CDialog
{
	DECLARE_DYNAMIC(CTestDlg);
	friend class CTestDlgAutoProxy;

// Construction
public:
	CTestDlg(CWnd* pParent = NULL);	// standard constructor
	Tester::_Numbers *com_ptr ;

CoInitialize(NULL);
<font color="red">Tester::_NumbersPtr p(__uuidof(Tester::_Numbers));</font>
com_ptr = p;
long i = com_ptr->GetDay();

The message that pops up says: "Runtime Error! The application has requested the Runtime to terminate it in an unusual way. Please contact the application's support team for more information." Where does and error message like that come from? Confused | :confused:

Nick Parker

You see the Standards change. - Fellow co-worker

Re: COM Problem, I think

Dave Bryant16-Jan-03 15:51

Dave Bryant

16-Jan-03 15:51

Try:

Tester::_NumbersPtr p;
p.CreateInstance(__uuidof(Tester::_Numbers));

Dave

Re: COM Problem, I think

Rama Krishna Vavilala16-Jan-03 17:04

Rama Krishna Vavilala

16-Jan-03 17:04

Nick Parker wrote:
Tester::_NumbersPtr p(__uuidof(Tester::_Numbers));

Should be

Tester::_NumbersPtr p(__uuidof(Tester::Numbers));

The constructor always takes the CLSID of the class not IID of the interface.

The mistakes made in this API make me realise that Microsoft has become big enough that it can shelter morons. If anyone working for me wrote anything this bad and tried to release it, I would kill them and display the body as a warning to the rest of the team. - Christian Graus about C# - GDI+

Re: COM Problem, I think

Nick Parker17-Jan-03 4:36

Nick Parker

17-Jan-03 4:36

Rama Krishna wrote:
Should be

Tester::_NumbersPtr p(__uuidof(Tester::Numbers));

I tried this and it looks like this now:

CoInitialize(NULL);
Tester::_NumbersPtr p(__uuidof(Tester::Numbers));
com_ptr = p;
long i = com_ptr->GetDay();
AfxMessageBox(i);

However it throws an error in appui1.cpp. What file is this, I have never heard of it.

Nick Parker

You see the Standards change. - Fellow co-worker

Re: COM Problem, I think

Rama Krishna Vavilala17-Jan-03 5:23

Rama Krishna Vavilala

17-Jan-03 5:23

>>AfxMessageBox(i);

AfxMessageBox takes the ID of the string resource not a number. So you need to wrote code like :-

long i = com_ptr->GetDay();

char sz[32];
itoa(i, sz, 10);
	
AfxMessageBox(sz);

The mistakes made in this API make me realise that Microsoft has become big enough that it can shelter morons. If anyone working for me wrote anything this bad and tried to release it, I would kill them and display the body as a warning to the rest of the team. - Christian Graus about C# - GDI+

How to get the free video memory?

John Seo16-Jan-03 15:28

John Seo

16-Jan-03 15:28

How to get the free video memory?

Re: How to get the free video memory?

Daniel Strigl16-Jan-03 19:35

Daniel Strigl

16-Jan-03 19:35

Take a look on the DirectDraw / DirectX SDK!

Daniel Wink | ;)

---------------------------
Never change a running system!

Re: How to get the free video memory?

John Seo16-Jan-03 20:15

John Seo

16-Jan-03 20:15

Thanks Daniel.

But, I'm using Win32 and DirectX 8.1 SDK.
DX API GetAvailableTextureMem() returns an estimate of the amount of available texture memory.
I want to know the actual size of the video RAM of installed graphic card.

Re: How to get the free video memory?

Daniel Strigl17-Jan-03 2:55

Daniel Strigl

17-Jan-03 2:55

Take a look on the IDirectDraw7::GetAvailableVidMem function.

IDirectDraw7::GetAvailableVidMem:

The IDirectDraw7::GetAvailableVidMem method retrieves the total amount of display memory available and the amount of display memory currently free for a given type of surface.

Daniel Wink | ;)

---------------------------
Never change a running system!

Thanks^^

John Seo17-Jan-03 13:17

John Seo

17-Jan-03 13:17

Thanks Daniel^^;;

(Why is this omitted in DirectX 8?)

Re: Thanks^^

Daniel Strigl17-Jan-03 21:15

Daniel Strigl

17-Jan-03 21:15

John Seo wrote:
Why is this omitted in DirectX 8?

I doun't know Confused | :confused:

! Ask Bill Wink | ;)

!

Daniel Wink | ;)

---------------------------
Never change a running system!

Something like common dialog

Quek Khoo Boon16-Jan-03 14:49

Quek Khoo Boon

16-Jan-03 14:49

Hi :

I need some help. What I am trying to do is to have a common dialog that can be used from any class, a good example would be a file browser or print dialog.

Suppose I create the dialog template ( through resource editor ) , and the wizard creates a class Dlg.cpp and Dlg.h.

I have a derived button class ( call XButton ) that if double clicked, should open up this dialog. Naturally, I have to include Dlg.h - but it gives me the following errors :

c:\windows\desktop\vc++\x\mynewdlg.h(21) : error C2065: 'IDD_DIALOG123' : undeclared identifier
c:\windows\desktop\vc++\x\mynewdlg.h(21) : error C2057:

It seems that I can only include this Dlg.h to files that source in resource.h - which well, makes sense since IDD_DIALG123 is defined in there.

How do I work around this ?

Any suggestion will be appreciated.

Re: Something like common dialog

xxhimanshu16-Jan-03 20:35

xxhimanshu

16-Jan-03 20:35

hi,
i had a similar problem previously, I guss in your resource.h you don't have your dialog id and a value assigned to it. If it does then is your classwizard using the dialog for yourdlg.h and .cpp files. If yes then do one thing note the number from the resource.h file for your dialog and write it into the place IDD_DIALOG123 in enum { IDD = IDD_DIALOG123 }.
hope it solves ypur problem.

cheers,

Himanshu

Re: Something like common dialog

Quek Khoo Boon17-Jan-03 3:24

Quek Khoo Boon

17-Jan-03 3:24

Thanks. I know what you mean. Your answer works, but I need a bit more.

I also tried including resource.h and the file compiled fine.

What I really need is this :

This dialog box will eventually need to go into a library, and be available at various parts of the program. I have been reading up a fair bit since I sent this mail, and realised that to create a CDialog class, I need the resource id. Problem I see here is that library allows me to include *.cpp and *.h to build the *.lib, but not the resource.h
file.

How does the common dialogs like CFileDialog work, since it is derived from CDialog->CCommonDialog too ?

Perhaps, what I need is done differently, and I am going the wrong way.

Any suggestion to put me back to the correct path is very much appreciated.

Thanks.

Keeping dialog alive with heavy process... thread?

LukeV16-Jan-03 14:20

LukeV

16-Jan-03 14:20

Hi,

I have a dialog that has to lauch some quite big operation and I want the user to be able to hit the Cancel button to stop the execution of the operation.

I was using a thread:

m_hThread = (HANDLE)_beginthreadex( NULL, 0, &ApplyProc, this, 0, &threadID );

where this is a pointer to my dialog. I was doing this because there where too many objects I needed so I tought it would be easier to just pass a pointer to the dialog.

In the thread function, I would cast a pointer to the dialog and use functions from it:

CDlgWizard* pD = (CDlgWizard*)pDlg;

pD->SomeFunction();

…
…

Now, this works fine on some machines, but on some other, it would make the app crash!

I guess I need to learn how to use threads Wink | ;)

How can I acheive this? Is there any other was than using threads? As long as the user can cancel the operation, it's fine with me!

Also, I'm using ATL but I guess it doesn't really matter for that kind of problem.

Thanks! Smile | :)

Re: Keeping dialog alive with heavy process... thread?

Rage16-Jan-03 21:28

Rage

16-Jan-03 21:28

Try in Mike's FAQ[^]

~RaGE();

dialog question...

joshfl16-Jan-03 13:25

joshfl

16-Jan-03 13:25

ok so i got this dialog application. at the beggining , before the main dialog shows, i wanted to show a splash dialog.

basically , im unsure how to do this.. the code below is what I have started in the Applications initinstance()....
I dont know how to programmatically exit out of the DoModal state so i can continue on to sleep statement, and then to close dialog.... please help Smile | :)

thanks.

// show splash window
CSplashy splash;
splash.DoModal();

Sleep(5000); // sleep roughly 5 seconds..

// Need to kill splash dialog here and continue program....

CEyeSpyDlg dlg;
m_pMainWnd = &dlg;
int nResponse = dlg.DoModal();

if (nResponse == IDOK)
{
// TODO: Place code here to handle when the dialog is
// dismissed with OK
}
else if (nResponse == IDCANCEL)
{
// TODO: Place code here to handle when the dialog is
// dismissed with Cancel
}

// Since the dialog has been closed, return FALSE so that we exit the
// application, rather than start the application's message pump.
return FALSE;

todo....
:: insert inpirational text here ::

Re: dialog question...

Stefan Pedersen16-Jan-03 13:53

Stefan Pedersen

16-Jan-03 13:53

You can't use a modal dialog as splashscreen unless you start messing with a timer within the splashscreen dialog.

"You can stand all night at a redlight anywhere in town, hailing Marys left and right but none of them slow down. I've seen the best of men go past. I don't wanna be the last..."

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