Managed C++/CLI

deadlyabbas18-May-09 3:14

deadlyabbas

18-May-09 3:14

I have solved that issue .........
I just put my dll in GAC by usin Visual studio 2008 command prompt

Mark Salsbery18-May-09 5:31

18-May-09 5:31

deadlyabbas wrote:
I just put my dll in GAC

Is that really what you wanted?

The GAC is not a dumping ground for fixing debugging error messages...

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

led mike18-May-09 6:35

led mike

18-May-09 6:35

Mark Salsbery wrote:
The GAC is not a dumping ground for fixing debugging error messages

Says you! Next you'll be suggesting that people read the documentation. Poke tongue | ;-P

deadlyabbas18-May-09 23:02

deadlyabbas

18-May-09 23:02

Thnx 4 looking into my problem...........
Sorry 4 d pain i gave .......
Well it ended happily Smile | :)

Mark Salsbery19-May-09 6:04

19-May-09 6:04

Thank goodness for lingo2word.com, otherwise I wouldn't be able to
read his/her reply to you...

Wow...

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

Draw Rectangle onto Picture in PictureBox

led mike19-May-09 6:37

led mike

19-May-09 6:37

I just figured he was replying to you anyway. Probably having trouble figuring out the whole tree structure concept.

cherrymotion17-May-09 4:25

cherrymotion

17-May-09 4:25

Hi all,
I know, the question sounds simple, but I do not get it at the moment.
Drawing a rectangle into a picturebox is no problem. But as soon as I loaded
an image (here: a bitmap) into it, the image covers my rectangle and it is not to be
seen anymore.
I tried so much things now, getting a the Graphics-Handle of the image itself seemed to
be most logic for me, like:

Graphics ^g = e->Graphics->FromImage(this->pictureBox1);
g->DrawRectangle(gcnew Pen(Color::Black,3),*m_AreaRoi[i].AreaRect);

Failed!
Another try with this:

<pre>e->Graphics->DrawRectangle(gcnew Pen(Color::Black,3),*m_AreaRoi[i].AreaRect);

inside the OnPaint()-Function also failed.

The Project in this case is a Forms Control Library with a picturebox in it, as additional information.
I just want to draw a "region of interest"-rectangle onto the image loaded in the picturebox, it can't
be that difficult...
Please help me!
Thanks

Re: Draw Rectangle onto Picture in PictureBox

N a v a n e e t h17-May-09 4:47

Re: Draw Rectangle onto Picture in PictureBox

17-May-09 4:47

Are you calling Invalidate() after finished drawing rectangle? If not, call this->pictureBox1->Invalidate() which will force the picture box control to redraw.

Navaneeth

How to use google | Ask smart questions

cherrymotion17-May-09 6:10

cherrymotion

17-May-09 6:10

Great, it worked! Thank you!

Graphics ^g = this->pictureBox1->CreateGraphics();
g->DrawRectangle(gcnew Pen(Color::Black,3),*m_AreaRoi[i].AreaRect);
this->pictureBox1->Invalidate();

That's the way it does right.
Instead of Invalidate I used pictureBox->Refresh() and the rectangle always just twinkled a short time and
has gone away.
I don't understand this behaviour, why does Refresh() after calling the functioning code above also "delete" the rectangle?
So what are the Differences between Invalidate and Refresh?

Thanks a lot!

Re: Draw Rectangle onto Picture in PictureBox

N a v a n e e t h17-May-09 6:48

17-May-09 6:48

I am not sure why Refresh didn't worked for you. When you call Invalidate(), it just invalidates the client area. It will not repaint immediately. It will be repainted when the control receives a WM_PAINT message. So Invalidate() is not synchronous.

Refresh just calls other overload Invalidate(true) and Control.Update to force paint on the control. This is synchronous and you can see the effect immediately.

I tried your sample and Refresh worked just fine on my machine.

Smile | :)

Navaneeth

How to use google | Ask smart questions

Reference User32.lib

thenutz7215-May-09 14:16

thenutz72

15-May-09 14:16

I'm trying to learn c++ and I just spent some time trying to use GetWindowText(). I was getting a linker error for unresolved token LNK2028, LNK2019. I finally added "C:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Lib\User32.lib" path to Project->Properties->Linker->Input and it worked. But I have two questions for anyone who may know so that I may understand a little better. And maybe someone else can use this later, too.

.NET 2008 C++, WinXP Home

1) Why did I have to that? I kept telling myself the dll was already referenced and I had the "windows.h" #include going on. Everything looked correct (as far as my understanding goes (not far)).

The code is in a normal CLR project, .NET Form button_click (so it must be using User32.dll already, right?). If you check the Linker->Input Additional Dependencies it shows User32.lib in "Inherited Values" along with all of the other Windows libraries. So I assumed I didn't have to add it.

2) It may have worked but did I do it 'right'? I ran a search on my drive for user32.lib (I expected it in C:\WINDOWS somewhere but it was in the path listed above. Should I move it? There are others in "C:\Program Files\Microsoft SDKs\Windows\v6.0A\Lib" and the like.

Thanks.

Re: Reference User32.lib

Mark Salsbery15-May-09 20:20

How to get machine certificate and user license.

15-May-09 20:20

thenutz72 wrote:
Why did I have to that? I kept telling myself the dll was already referenced and I had the "windows.h" #include going on.

windows.h has nothing to do with the linker. It's the import library
you were missing that the linker needed.

thenutz72 wrote:
The code is in a normal CLR project, .NET Form button_click (so it must be using User32.dll already, right?).

No. The .NET framework may use user32.dll internally but that has nothing to do with your project.

thenutz72 wrote:
It may have worked but did I do it 'right'?

Not necessarily. If you're using native code from a managed class' code,
the you would use platform invoke: Using Explicit PInvoke in C++ (DllImport Attribute)[^]

You shouldn't be mixing paths to different SDKs. If you're using the
Visual Studio IDE for your project, then use its directories settings
to configure paths to the ONE SDK you want to use. Then you don't need
paths in all your project configurations unless you need to override something.

Learning C++/CLI is a pretty big undertaking for a beginner in C++...
Are you sure you don't want to get familiar with the C++ language before adding
the complexity of the managed world? All your questions are fundamentals you should know Smile | :)

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

Re: Reference User32.lib

thenutz7216-May-09 9:12

thenutz72

16-May-09 9:12

Awesome answer, thanks!

deadlyabbas12-May-09 21:00

deadlyabbas

12-May-09 21:00

I am working on AD RMS so can u plz tell me that how to get the machine certificate and
how to get the User License and How to get RAC(Rights Account Certificate)
PLease tell me that what is needed the first.

Re: How to get machine certificate and user license.

Randor 14-May-09 15:06

Randor

14-May-09 15:06

deadlyabbas wrote:
PLease tell me that what is needed the first.

You should probably become familiar with the Active Directory Rights Management Services SDK[^] as there are some code samples which you might be interested in.

Rights Account Certificate Code Example[^]

Best Wishes,
-David Delaune

About Multiple Windows Forms

savitri11-May-09 20:47

11-May-09 20:47

Hi All,

I am Savitri Here. I new to VC.Net.I am using visual studio 2005.In this i am doing one small program. I started the project like CLR->Windows Application. In that initially Form1 was created.In that i added one more Windows Form called Loginform. I am accessing functions and variables from loginform to Form1 by adding #include "LoginForm.h" in form1.h. But i want access functions of Form1 into LoginForm class,in this i am facing problem and i was not able to include "Form1.h" in LoginForm. Why it is giving problem i am not understanding? Please give me some solution or hints from that i will solve the problem. Please tell me any good books for vc.net and i want some samples of vc.Net.Please help me out.
Thanks in advance to all.

Regards,
Savitri P

N a v a n e e t h12-May-09 22:24

12-May-09 22:24

Hi Savitri,

savitri wrote:
Why it is giving problem i am not understanding?

If you do that, you will get circular reference. This is the reason for all those errors. You need to forward declare Form1 inside LoginForm and include form1.h in LoginForm.cpp and use the methods from Form1.

// LoginForm.h

ref class Form1;

public ref class Loginform : public System::Windows::Forms::Form
{
   // code goes here
}

// LoginForm.cpp

#include "form1.h"

void Loginform::SomeMethod()
{
   // you can access form1 methods here without any error
}

savitri wrote:
Please tell me any good books for vc.net and i want some samples of vc.Net

1 - C++/CLI in action[^]. (This is my favorite)
2 - Visual C++/CLI and the .NET 3.5 Platform[^]

Smile | :)

Navaneeth

How to use google | Ask smart questions

savitri13-May-09 1:22

13-May-09 1:22

Hi,

Thanks for suggestions.But still i have one doubt. That is shall i create object in constructor or what? or without that how can i use methods of form1 in loginform. Help me please.
Thanks in advance.

Regards,
Savitri P

N a v a n e e t h13-May-09 2:20

13-May-09 2:20

Pass the Form1 object via LoginForm's constructor.

Navaneeth

How to use google | Ask smart questions

savitri13-May-09 19:41

13-May-09 19:41

Hi Navaneeth,

Thanks for your reply.I have one more doubt hot we can inherit the classes in vc.net programming. Like in C# i have one class called xyz this is normal class not window form. and one more class called save this is windows form. they wrote like this. partial class save: public xyz{ //code here}. Like this how can i write in vc.net or else is der another way to access one class into other class. Please help me out.

Thanks in advance.

Regards,
Savitri P Smile | :)

Mark Salsbery14-May-09 6:58

14-May-09 6:58

If you derive xyz from save, and save is a form, then xyz is a form too.

Is that really what you want?

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

N a v a n e e t h14-May-09 16:02

14-May-09 16:02

savitri wrote:
they wrote like this. partial class save: public xyz{ //code here}.

Is this C#? If yes, it is not valid/ Like c++, you don't specify access modifiers when inheriting.

savitri wrote:
Like this how can i write in vc.net

AFAIK, C++/CLI doesn't support partial classes.

You said XYZ is a normal class and Save is a windows form. If yes, how can Save derive from XYZ? It has to derive from System::Windows::Forms::Form or it's children.

savitri wrote:
is der another way to access one class into other class. Please help me out.

You have to include classes header file and use it. What is the confusion here? Your question is not clear enough to answer.

Smile | :)

Navaneeth

How to use google | Ask smart questions

savitri14-May-09 19:20

14-May-09 19:20

Hi,

Ya i have to include header files to access the functions and variables of that class. thanks for ur guidance. I got the soft copy of that book what u specified in previous reply.
In VC.NET i have 2 windows forms Called Form1 and Form2.
I am including form2.h in form1 and accessing all the functions of form2.
But when i am including form1.h in form2 then i am getting error and not able to access the functions.
After that i did like this.
ref class form1;and created object of form1 in form2 constructor and when i called form2 frm=gcnew form2(this);

and also i am getting error like base class undefined for this code public ref class form2: form1
{//code here
}

Sorry if i written something wrong.I am new to this .net.Please help me to learn this.
Thanks in advance.

Regards,
Savitri P

N a v a n e e t h14-May-09 23:52