Managed C++/CLI Discussion Boards

Re: Merge exe(of managed and unmanaged code) and dlls into single exe

N a v a n e e t h1-Nov-09 23:57

1-Nov-09 23:57

IL merge can work only with managed assemblies. I guess mixed mode and native DLLs are not supported. IMO, you don't have to deploy msvc runtime files manually. Get the redistributable package from MSDN and install it on target machine before your application is installed. That should install all the necessary dependencies.

Best wishes,
Navaneeth

Re: Merge exe(of managed and unmanaged code) and dlls into single exe

santoshkaif2-Nov-09 0:06

santoshkaif

2-Nov-09 0:06

Agree with your suggestion but my application will be used by the production line zombies. So, asking them to get the redistributable installed is a huge task for them.

Hence packaging everything into one is the solution i see. pls let me know how to do this.

Thanks

Thread injection

csrss30-Oct-09 12:12

csrss

30-Oct-09 12:12

Hey guys. Maybe thats stupid question, but i am pretty curious why
i cannot inject a thread from application written in managed c++ .NET into for example
notepad.exe.
The code i am trying to inject is not .net - it is win32 code. NET in this example
used only for GUI - simple window with button "Inject", the rest of code is win32 only.
Actually the rest of the code is simply copied from console C application.
I am curious because, for example, i can inject a working thread from win32 application into native application(for example, from my_proggie.exe - which is win32 app, into smss.exe - which is pure native) if i am injecting native functions (for example, not OpenProcess but NtOpenProcess), why i cannot do the same thing here? And by the way, is it possible at all? I know it is possible to inject a dll loading routine even from C# app into C app, but how about a thread?

Re: Thread injection

N a v a n e e t h30-Oct-09 16:44

N a v a n e e t h

30-Oct-09 16:44

csrss wrote:
i can inject a working thread from win32 application into native application(for example, from my_proggie.exe - which is win32 app, into smss.exe - which is pure native

I thought Win32 applications are also called as native. What do you meant by pure native? Also what is thread injection and what are you trying to achieve by that?

Best wishes,
Navaneeth

Re: Thread injection

csrss30-Oct-09 17:45

csrss

30-Oct-09 17:45

What am i trying to achive... for example i want some remote process to do something for me and i dont want to do it from my process, or i just need to get into remote process, or i am doing it just for fun. There are many reasons i might need to use it.

Win32 apps are win32 subsystem specific apps and they are not native, well you can call them native but thay are higher level then, for example, csrss (client-server runtime subsystem) app, or smss(session manager subsystem), you cannot run them inside win32 subsystem. for example disk check util. is native too - it runs before win32 subsystem initialization. For example CreateFile is win32 API, while NtCreateFile/ZwCreateFile is native API. And you know that ZwCreateFile you can call from win32 app, native app and kernel mode driver. But if you will try to inject some thread into, for ex. csrss, lets say thread has one function - ExitProcess, it will not work, but if NtTerminateProcess((HANDLE)-1, 0) will be injected - you will have a BSOD, because you forced csrss to shutdown itself.
Thats what i am talking about - just playing with system internals.

So i tried to do some injection stuff from managed c++ .NET and it is not working, and i dont know why. Maybe thats all about this .NET platform, code translating is some kind different. Well, what is funny it cannot even inject into itself - probably i have to do some debugging to get idea why is that so. Or i am missing something with function pointers and addresses? Thats whay i have posted my question here in hope to get some detailed info how these things works in case of managed c++

Refresh Database

rdop29-Oct-09 22:02

rdop

29-Oct-09 22:02

Hi All

I am using mysql,::_RecordsetPtr pRecordset and ODBC.I create database through code
<preprecordset=m_pconn->execute(_bstr_t("create database="" clientname"),0,="" adcmdtext);="">
It's work fine but i want to use refresh after creating database.There is any way to refresh mysql database through code.Plz help me

Re: Refresh Database

N a v a n e e t h30-Oct-09 16:38

N a v a n e e t h

30-Oct-09 16:38

What do you mean by refresh database? And why are you using ODBC to connect MySQL from Managed code? A better alternative would be the connector provided by MySQL.

Best wishes,
Navaneeth

>(resources->GetObject(L"Ythree.Image")));

ikurtz29-Oct-09 5:16

ikurtz

29-Oct-09 5:16

>(resources->GetObject(L"Ythree.Image")));

I need some help. The above code gets an image from .resX file.

What is the code if i want to load an image from the app.rc file?

I am finding that using resX, if i am using the same image more than once a new copy of the image is being created on executing the application and the code modified to point to images created when the program is executed.

Thanks for the time.

Re: >(resources->GetObject(L"Ythree.Image")));

ikurtz29-Oct-09 5:27

ikurtz

29-Oct-09 5:27

i think i have to use the imageList control for this as resX is the .net way of doing things.

Re: >(resources->GetObject(L"Ythree.Image")));

ikurtz29-Oct-09 8:55

ikurtz

29-Oct-09 8:55

if images are imported/used in resX using imagelist.

how do i store audio clips in the application resources? do i use app.rc for that?

also i would like to embed icons in it also. how and where do i store them?

thanks.

Re: >(resources->GetObject(L"Ythree.Image")));

ikurtz30-Oct-09 4:26

ikurtz

30-Oct-09 4:26

ok i think i have figured out how resX works.

thanks.

Unresolved externals

Lutosław28-Oct-09 23:04

Lutosław

28-Oct-09 23:04

Yup, I did Google but nothing helped. I get strange linker errors.

Error	1	error LNK2001: unresolved external symbol "extern "C" int __cdecl wsprintfW(wchar_t *,wchar_t const *,...)" (?wsprintfW@@$$J0YAHPA_WPB_WZZ)	ComPort.obj	Lab1
Error	2	error LNK2001: unresolved external symbol "extern "C" long __stdcall RegQueryValueExW(struct HKEY__ *,wchar_t const *,unsigned long *,unsigned long *,unsigned char *,unsigned long *)" (?RegQueryValueExW@@$$J224YGJPAUHKEY__@@PB_WPAK2PAE2@Z)	Lab1.obj	Lab1
Error	3	error LNK2001: unresolved external symbol "extern "C" long __stdcall RegQueryInfoKeyW(struct HKEY__ *,wchar_t *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,unsigned long *,struct _FILETIME *)" (?RegQueryInfoKeyW@@$$J248YGJPAUHKEY__@@PA_WPAK22222222PAU_FILETIME@@@Z)	Lab1.obj	Lab1
Error	4	error LNK2001: unresolved external symbol "extern "C" long __stdcall RegEnumValueW(struct HKEY__ *,unsigned long,wchar_t *,unsigned long *,unsigned long *,unsigned long *,unsigned char *,unsigned long *)" (?RegEnumValueW@@$$J232YGJPAUHKEY__@@KPA_WPAK22PAE2@Z)	Lab1.obj	Lab1
Error	5	error LNK2001: unresolved external symbol "extern "C" long __stdcall RegOpenKeyExW(struct HKEY__ *,wchar_t const *,unsigned long,unsigned long,struct HKEY__ * *)" (?RegOpenKeyExW@@$$J220YGJPAUHKEY__@@PB_WKKPAPAU1@@Z)	Lab1.obj	Lab1
Error	6	fatal error LNK1120: 5 unresolved externals	Lab1

The linker throws errors only in a Release configuration. In a Debug conf the project compiles successfully.
If I comment out lines where I use the functions above, the code compiles. But certainly is not what I want.
What's interesting, I use other functions from WinAPI and they work. Also wscanf_s compiles with no errors.
Also, wiping .obj files out (and all other which are generated during compilation) does not help Sigh | :sigh:

Thanks in advance --

Greetings - Jacek

Solved externals

Lutosław28-Oct-09 23:20

Lutosław

28-Oct-09 23:20

Release -> Project properties -> Config -> Linker -> Input -> Additional Dependencies -> remove "NoInhert".

Phew... I had spent 3 hours searching and only after posting on CP I solved the problem. Thank you!

Greetings - Jacek

Memory access exception instantiating c++ native code from /clr c++ code

redivider28-Oct-09 7:37

redivider

28-Oct-09 7:37

Here is my setup.

- c# wrapper calls managed c++ API code
- managed c++ calls unmanaged API code (c++ compiled with the /clr flag, located in the same project) using static funtions
- API tries to instantiate object defined in another dll (native c++)

void Screen::EvaluateScreen(LPCTSTR lpStrScreen, LPCTSTR lpStrSetName, LPCTSTR lpStrPeriods) 
{
  NativeDocument *screenDoc = NULL;
  screenDoc = new NativeDocument;

calling the constructor causes a "Attempted to read write protected memory. ....memory corupt?..." error in the contstructor code.

I'm new to c++ coding as well as this interop stuff. Any ideas? Is there an issue instantiating native code from inside the /clr compiled c++? The code i'm using (EvaluateScreen) is lifted from another native DLL so the code in there should be good (i guess).

Re: Memory access exception instantiating c++ native code from /clr c++ code

N a v a n e e t h28-Oct-09 15:54

N a v a n e e t h

28-Oct-09 15:54

redivider wrote:
Is there an issue instantiating native code from inside the /clr compiled c++

No. /clr compiler switch indicates that a mixed mode assembly has to be generated. It can work with both managed and unmanaged types.

Where is NativeDocument located? Is that in the DLL? Is your application multi-threaded?

Best wishes,
Navaneeth

Re: Memory access exception instantiating c++ native code from /clr c++ code

redivider29-Oct-09 5:55

redivider

29-Oct-09 5:55

Not multi-threaded.
NativeDocument is in another dll
C# dll -> /clr dll -> c++ dll (w/ NativeDocument class)

Re: Memory access exception instantiating c++ native code from /clr c++ code

N a v a n e e t h29-Oct-09 6:48

N a v a n e e t h

29-Oct-09 6:48

I couldn't reproduce this error. I have created a native DLL which has a sample NativeDocument class. Exported the functions and used this class from C++/CLI. Created a C# application and referred C++/CLI DLL there and everything worked as expected. If you can provide more information to reproduce, I will try.

Best wishes,
Navaneeth

tableLayoutPanel grid orientation

ikurtz27-Oct-09 10:04

ikurtz

27-Oct-09 10:04

im trying to use the tableLayoutPanel in my application but am stuck.

the panel seem to work on a grid system the is (y,x) and not (x,y).

i.e. on a (col, row) system and not a (row, col) system.

is there any way i can change this coordinate system?

please advise.

ikurtz.

How to use Crystal Report in Visual C++ .Net 2005 [modified]

Kingshuk Sarkar27-Oct-09 2:19

Kingshuk Sarkar

27-Oct-09 2:19

Hi,
I m using Visual C++ .Net 2005.
Making a CLI based Windows Forms Applicaion.
But unable make object of Crystal Report .rpt class.
Is there any special header file i have to include for using Crystal Report, or can any one send me some sample code. That can be easier for me to understand.

Please Help.

Thanking you.

Kingshuk

modified on Wednesday, October 28, 2009 1:17 AM

How to make text width Uniform in richtextbox?

santoshkaif24-Oct-09 4:00

santoshkaif

24-Oct-09 4:00

Hi,
am new to VC++ and trying to display text on richtextbox and the width is irregular for each character.

Font setting used is as below

richtextbox1->Font = (gcnew System::Drawing::Font(L"Arial", 9.75F, System::Drawing::FontStyle::Regular, System::Drawing::GraphicsUnit::Point,static_cast<System::Byte>(0)));

I want the text width to be uniform i.e to make it readable.

Thanks in advance

Re: How to make text width Uniform in richtextbox?

Nuri Ismail24-Oct-09 6:05

Nuri Ismail

24-Oct-09 6:05

santoshkaif wrote:
I want the text width to be uniform i.e to make it readable.

You should use Monospaced font[^]. Arial [^] is a sans-serif font. Try with Courier, Courier New or other monospaced font.

Nuri Ismail

Re: How to make text width Uniform in richtextbox?

santoshkaif24-Oct-09 22:42

santoshkaif

24-Oct-09 22:42

Thanks!! Courier New worked for me.

reading in char

jonig1923-Oct-09 14:31

jonig19

23-Oct-09 14:31

I need to read in numbers until a new line. Once I hit the newline, it should leave the while loop. This isn't happening though with the code I wrote, any help would be appreciated!

...
   while ( character != '\n' )
   {
      if( true( character, num ) )
      {
          execute code here
      } 
      else 
      {
         return -1;
      }
      cin >> chDigit; 
   }
...

Re: reading in char

Mark Salsbery24-Oct-09 6:20

Mark Salsbery

24-Oct-09 6:20

What is "character"?
What is "num"?

What does this have to do with managed c++/cli?

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

painting with correct timing on vertical sync

Andreoli Carlo22-Oct-09 3:56

Andreoli Carlo

22-Oct-09 3:56

it's possible to some operation like:

IntPtr hdc = this->panel1->GetHdc();
Graphics ^newGraphics = Graphics::FromHdc(hdc);
newGraphics->DrawImageUnscaled(tmp,0,0);
this->panel1->ReleaseHdc(hdc);

in correct timing with vertical sync without going into directx?
if this is possible, can someone point me out a tutorial or example where i can learn this thing?

modified on Thursday, October 22, 2009 10:09 AM

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