Re: Testing my first C driver - C / C++ / MFC Discussion Boards

candogu2-Apr-13 2:22

2-Apr-13 2:22

When I build the file, all the lines gives error. I think configuration files have errors. SOURCES and MAKEFILE. Thanks for your replies.

Re: Testing my first C driver

Richard MacCutchan2-Apr-13 2:30

Richard MacCutchan

2-Apr-13 2:30

Sorry, I have no idea what that means, but I suspect you are missing some essential component in your build configuration.

Use the best guess

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:46

Erudite_Eric

3-Apr-13 0:46

So show us the SOURCES file.

==============================

Nothing to say.

Re: Testing my first C driver

Jochen Arndt2-Apr-13 3:05

Jochen Arndt

2-Apr-13 3:05

I'm not sure if this helps. But you may try (for all functions):

// Function declaration with STDCALL calling convention
NTSTATUS STDCALL DriverDispatch(IN PEDEVICE_OBJECT DeviceObject, IN PIRP Irp);

// Function definition without calling convention
NTSTATUS DriverDispatch(IN PEDEVICE_OBJECT DeviceObject, IN PIRP Irp)
{
    return STATUS_SUCCESS;
}

Re: Testing my first C driver

Erudite_Eric3-Apr-13 3:34

Erudite_Eric

3-Apr-13 3:34

No, you dont want to mess with that, leave the compiler do its thing.

==============================

Nothing to say.

Re: Testing my first C driver

David Crow2-Apr-13 4:34

David Crow

2-Apr-13 4:34

Have you included windows.h (or equivalent)?

Have you tried commenting out statements until the compiler errors go away, and then introduce them back one by one until the compiler errors show up?

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:45

Erudite_Eric

3-Apr-13 0:45

DavidCrow wrote:
Have you included windows.h?

In a driver? He needs wdm.h unles he is building an NT4 style driver.

==============================

Nothing to say.

Re: Testing my first C driver

Erudite_Eric3-Apr-13 0:58

Erudite_Eric

3-Apr-13 0:58

Good job you cant build it because it will BSOD anyway.

You need to do this for starters in DriverEntry:

C++

for (Index = 0 ; Index <= IRP_MJ_MAXIMUM_FUNCTION ; Index++)
{
    DriverObject->MajorFunction[Index] = MyDispatch;
}

DriverObject->DriverExtension->AddDevice            = 0; // non PnP so dont set this

DriverObject->DriverUnload                          = MyUnload;

Your MyDispatch actually needs to do something with the Irps, set Information to 0, the status block to success and return success.

C++

Irp->IoStatus.Status     = STATUS_SUCCESS;
Irp->IoStatus.Information    = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_SUCCESS;

You then need to make sure you are using the DDK (of WDK) compiler, as in actually install the entire DDK (WDK). I dont know what CodeBlocks is, I dont care, the DDK compiler is the one you must use.

You need to get your SORCES file right, look at some of the samples that ship with the DDK (WDK).

You then need a service entry in the registry in order to start your driver, either inf file or do it manually, then start it with 'net srart'.

==============================

Nothing to say.

code conversion MATLAB to c

Member 99587781-Apr-13 21:12

Member 9958778

1-Apr-13 21:12

Hi all I want to convert the following code of MATLAB in c can any expert can help me?
thanks in advance

%ICA START//
data1=[a;b;c];
MEANMAT=repmat(mean(data1')',1,length(data1));
c1=cov(data1');
[T1,E1]=eig(c1);
data2=T1'*(data1-MEANMAT);
%data2=T1*(data1);
c2=cov(data2');
[T2,E2]=eig(c2);
data=E2^(-1/2)*data2;
T=E2^(-1/2)*T1;
c=cov(data');//

Re: code conversion MATLAB to c

C^hris L^osinger2-Apr-13 7:49

C^hris L^osinger

2-Apr-13 7:49

what does that Matlab code do?

image processing toolkits | batch image processing

Accessing Win32 APIs from WinRT app through Win32 Dll

msr_codeproject1-Apr-13 4:21

msr_codeproject

1-Apr-13 4:21

Hi, I am trying to call Win32 API from Windows Store App. Since Win32 APIs can not be accessed from WinRT, I have written a Win32 Dll and exposed a function.

I am trying to call this function from WinRT App. But I am getting 'Access Denied' Error.

Dll Code:

C++

extern "C" __declspec( dllexport )INT32 ScanWlan()
{
// Declare and initialize variables.

HANDLE hClient = NULL;
DWORD dwError = ERROR_SUCCESS;

DWORD dwMaxClient = 2;  
DWORD dwCurVersion = 0;
DWORD dwResult = 0;

dwResult = WlanOpenHandle(dwMaxClient, NULL, &dwCurVersion, &hClient);
if (dwResult != ERROR_SUCCESS) 
{
 WlanCloseHandle(hClient, NULL);
 wprintf(L"WlanOpenHandle failed with error: %u\n", dwResult);
 return 1;
}

I am able to call this funtion from WinRT App. But 'WlanOpenHandle' function failed with error 5 (ERROR_ACCESS_DENIED).

I have done this using administrator login also. But still I am getting the same error.

Am I doing the right thing?

Can We access Win32 APIs from WinRT Apps through Dlls (at least).

Any help?

Thank you,

Sai

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

Richard MacCutchan1-Apr-13 21:37

Richard MacCutchan

1-Apr-13 21:37

The value in dwMaxClient is incorrect. It should be a composite value constructed with the WLAN_API_MAKE_VERSION() macro, as described in the documentation[^].

Use the best guess

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

msr_codeproject1-Apr-13 23:17

msr_codeproject

1-Apr-13 23:17

Hi Richard MacCutchan, thank you for your reply.

I changed my code like this.

dwResult = WlanOpenHandle(WLAN_API_MAKE_VERSION(2, 0), NULL, &dwCurVersion, &hClient);

But still its throwing the same error.

Basically I'm trying to find Wi-Fi n/w interfaces and trying to get available Wi-Fi access points.

If I run this code from a pure Win32 application, I am able to get the interfaces and Wi-Fi access points.
But not working from WinRT App.

Regards
Sai

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

MicroVirus1-Apr-13 23:43

MicroVirus

1-Apr-13 23:43

If you use a DLL, that DLL is loaded into your WinRT process space and shares the same security context as the WinRT apps. In other words, you cannot 'escape the sandbox' via a DLL.
Unfortunately, I have no experience with programming WinRT, so I can not present you with a solution, only an answer as to why this will not work.

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

msr_codeproject2-Apr-13 1:03

msr_codeproject

2-Apr-13 1:03

Hi Micro Virus, thanks for your reply.

I want to know are there any APIs available in WinRT to

1) Find WLAN interaface list (Win32 API - WlanEnumInterfaces)

2) Find Wi-Fi access points (Win32 API - WlanGetAvailableNetworkList)

Basically I am trying to write an WinRT application to do all these.

Any help?

Regards,

Sai

Re: Accessing Win32 APIs from WinRT app through Win32 Dll

MicroVirus3-Apr-13 10:41

MicroVirus

3-Apr-13 10:41

A quick search delivered this: http://msdn.microsoft.com/en-us/library/windows/apps/br207308.aspx[^]
Might be promising? But, as I said in my previous post, I do not have experience with Win RT apps myself and do not have a clear answer for you.

Best regards,

Richard

Creating an array of global Labels at runtime

Douglas Kirk31-Mar-13 12:08

Douglas Kirk

31-Mar-13 12:08

XML

I have an old Borland C++ project that displayed a 16 x 16 group of labels displaying 0x00 to 0xFF for the purpose of diagnostics.

I am now using MicroSoft Visual Studio 2010 C++

I am having a problem creating an array of labels at runtime that the labels are accessable by other routines such as a timer interval routine

<pre lang="c++">
#pragma once
#include <stdio.h>
 
namespace SerialTester {
 
using namespace System;
using namespace System::ComponentModel;
using namespace System::Collections;
using namespace System::Windows::Forms;
using namespace System::Data;
using namespace System::Drawing;
 
/// <summary>
/// Summary for Form1
 
int count;
int tindex;
    
 
/// </summary>
public ref class Form1 : public System::Windows::Forms::Form
{
public:
        
    Form1(void)
    {
      InitializeComponent();
      count = 0;
      tindex = 0;
      char buffer[200];

      array< Label ^ > ^ labels;
      labels = gcnew array<Label^>(256);
 
      for (int index = 0; index < 256; ++index) 
      {
         Label ^ label = gcnew Label;

         Controls->Add(label);
         labels[index] = label;
      }
    }
 
    protected:
    /// <summary>




 
private: System::Void timer1_Tick(System::Object^  sender, System::EventArgs^  e) 
  {
  labels[tindex++]->BackColor = ....... ; }
  }

So when I create the form I created an array of 256 Labels at runtime, labels[x] but in the timer1_Tick I can not access them because the array is not global.

QUESTION: How can I do this, should my creation be somewheres else so that it is global.

Any help from anyone would be greatly appriciated.

Or a link to a tutorial on this.

Thank you in advance
Douglas

modified 31-Mar-13 18:38pm.

Re: Creating an array of global Labels at runtime

Richard MacCutchan31-Mar-13 13:54

Richard MacCutchan

31-Mar-13 13:54

Please don't post the same question in multiple places; you already posted this in the Managed C++ forum.

Use the best guess

Re: Creating an array of global Labels at runtime

Douglas Kirk31-Mar-13 14:08

Douglas Kirk

31-Mar-13 14:08

Hello

Sorry not sure which section or fourm applies.
After not getting a response in one I thought perhaps the other was more appropiate.

Are you able to offer anything to the problem or am I simply on the wrong site.

Thank in advance
Douglas

Re: Creating an array of global Labels at runtime

NotPolitcallyCorrect31-Mar-13 14:12

NotPolitcallyCorrect

31-Mar-13 14:12

Douglas Kirk wrote:
not getting a response

You need to be patient.

Re: Creating an array of global Labels at runtime

Douglas Kirk31-Mar-13 14:28

Douglas Kirk

31-Mar-13 14:28

Thank you

I am trying to delete this thread, but will have to try later on my other machine

I will continue to watch on the other board

Douglas

Re: Creating an array of global Labels at runtime

NotPolitcallyCorrect31-Mar-13 15:16

NotPolitcallyCorrect

31-Mar-13 15:16

Douglas Kirk wrote:
delete this thread

I don't think you can delete it after is has replies.

Where to post/share example?

ReturnVoid30-Mar-13 1:45

ReturnVoid

30-Mar-13 1:45

Hi,

Just wondering where would I post/share example code/project to share with others? i.e. I have a WIP thing I've done that's not professional but I'd like to share, so not sure if I'd post it as an article or is there somewhere more appropriate.

EDIT: code/project is c++/MFC/OpenGL based, hence why I'm asking here.

Thanks.

Re: Where to post/share example?

NotPolitcallyCorrect30-Mar-13 2:29

NotPolitcallyCorrect

30-Mar-13 2:29

You could probably post it as a Tip/Trick.

Re: Where to post/share example?

Captain Price30-Mar-13 3:27

Captain Price

30-Mar-13 3:27

Articles --> "Submit an article or tip" Thumbs Up | :thumbsup:

Pravinda
the Magician

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.