C / C++ / MFC

Re: loading dll second time giving error "A required resource was unavailable"

1-Mar-12 20:19

Can u give me your mail id so that I can send you the project. Can u help me ?

Jochen Arndt1-Mar-12 21:46

Jochen Arndt

1-Mar-12 21:46

Sorry, but I don't want to write your code. I - and most others here - just enjoy helping.

The design of your application is definitely broken. That is your problem. Tampering with the existing code is the wrong way. Reconsider the design. Read about dialogs hosting user controls.

Re: loading dll second time giving error "A required resource was unavailable"

appollosputnik2-Mar-12 3:59

How to read USB type Disk Drive device?

2-Mar-12 3:59

I have got the problem I have implemented the PrecreateWindow for my view class.
just check this code.

[code]
BOOL CMyView::PreCreateWindow(CREATESTRUCT& cs)
{
cs.lpszClass = ::AfxRegisterWndClass(CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC,::LoadCursor(NULL, IDC_ARROW), NULL, NULL);

cs.style |= WS_CLIPSIBLINGS | WS_CLIPCHILDREN;

cs.dwExStyle = WS_EX_CLIENTEDGE;

return CView::PreCreateWindow(cs);
}
[/code]

If I remove the first line, i.e
cs.lpszClass = ::AfxRegisterWndClass(CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS | CS_OWNDC,::LoadCursor(NULL, IDC_ARROW), NULL, NULL);
then my dll window is coming all the times from the client call. But it's flickering .
So now please help me what can I do to resolve this. I think some of you must have understood the problem, please help me. Thanks a lot.

Le@rner29-Feb-12 21:42

29-Feb-12 21:42

hi all,

can any one help me to read USB type Disk Drive device.

please help me from where i can start.

thanks in advance.

Richard MacCutchan29-Feb-12 22:38

Richard MacCutchan

29-Feb-12 22:38

Please make an effort to try this[^] first.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Le@rner1-Mar-12 1:34

1-Mar-12 1:34

can u please more specific,how to detect and open this

coz its not open using serial port and CreateFile method.

thanks.

Richard MacCutchan1-Mar-12 2:19

Richard MacCutchan

1-Mar-12 2:19

Le@rner wrote:
can u please more specific

Afraid not; as with most questions like this, you need to go and do some research into what features are available and how you can implement them to solve your problem(s).

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Albert Holguin1-Mar-12 11:26

Albert Holguin

1-Mar-12 11:26

What are you trying to accomplish? ...this question is not clear. If it's a plain storage disk drive, and you're trying to read/write to it, it's the same as reading and writing to any file on your C:\. You just have to specify the full path of the files. The IO is handled by the drivers.

Le@rner1-Mar-12 18:04

1-Mar-12 18:04

i want to access the Card reader that is connect as drive.

Albert Holguin1-Mar-12 18:52

Albert Holguin

1-Mar-12 18:52

What do you want to do though? Are you trying to write to it? Do you not know what logical drive was assigned to it? Be more specific.

Le@rner1-Mar-12 20:53

1-Mar-12 20:53

i just want to read this?and read data of smart card is inserted in it.

David Crow2-Mar-12 2:41

2-Mar-12 2:41

Have you tried ReadFile()?

"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

Le@rner4-Mar-12 17:55

4-Mar-12 17:55

it means open it with CreateFile?

what parameter pass here for file name like \\.\driveletter: or anything else.

when i CreateFile using "\\.\driveletter:" and ReadFile than its return 0 and getlasterror is "The Parameter is incorrect".

and when i open it as physicaldrive its give "the device is not ready"

so now waht can i do?

and also tell me how can i diffrentiate this from other drive.

please guide me.

thanks.

modified 5-Mar-12 0:11am.

David Crow5-Mar-12 2:29

5-Mar-12 2:29

Le@rner wrote:
what parameter pass here for file name like \\.\driveletter: or anything
else.

See this discussion.

Le@rner5-Mar-12 18:56

5-Mar-12 18:56

C++

	HDEVINFO        hDevInfo, hIntDevInfo;
    BOOL            disk_status=FALSE;


    hDevInfo = SetupDiGetClassDevs(
                    (LPGUID) &GUID_DEVCLASS_DISKDRIVE,
                    NULL,
                    NULL, 
                    DIGCF_PRESENT  ); // All devices present on system
    if (hDevInfo == INVALID_HANDLE_VALUE)
    {
       
        return 0;
    }

   
    hIntDevInfo = SetupDiGetClassDevs (
                 (LPGUID)&GUID_DEVCLASS_DISKDRIVE,
                 NULL,                                   // Enumerator
                 NULL,                                   // Parent Window
                 (DIGCF_PRESENT | DIGCF_INTERFACEDEVICE  // Only Devices present & Interface class
                 ));

    if( hDevInfo == INVALID_HANDLE_VALUE ) 
	{
        
        return 0;
	}

	SP_DEVICE_INTERFACE_DATA            interfaceData;
    PSP_DEVICE_INTERFACE_DETAIL_DATA    interfaceDetailData = NULL;
   
    PUCHAR                              disk_p;
    UCHAR                               outBuf[512];
    ULONG                               length = 0,
                                        returned = 0,
                                        returnedLength=0;
    DWORD                               interfaceDetailDataSize,
                                        reqSize,
                                        errorCode, 
                                        disk_i=0;


	DWORD Index=0;

    interfaceData.cbSize = sizeof (SP_INTERFACE_DEVICE_DATA);

    disk_status = SetupDiEnumDeviceInterfaces ( 
                hIntDevInfo,             // Interface Device Info handle
                0,                      // Device Info data
                (LPGUID)&GUID_DEVCLASS_DISKDRIVE, // Interface registered by driver
                Index,                  // Member
                &interfaceData          // Device Interface Data
                );

    if ( disk_status == FALSE ) 
	{
        errorCode = GetLastError();
        if ( errorCode == ERROR_NO_MORE_ITEMS ) 
		{
            //No more interfaces
        }
        else 
		{
            //SetupDiEnumDeviceInterfaces failed 
        }
        return 0;
    }
        
    

    disk_status = SetupDiGetDeviceInterfaceDetail (
                hIntDevInfo,         // Interface Device info handle
                &interfaceData,     // Interface data for the event class
                NULL,               // Checking for buffer size
                0,                  // Checking for buffer size
                &reqSize,           // Buffer size required to get the detail data
                NULL                // Checking for buffer size
                );

   

    if ( disk_status == FALSE ) 
	{
        errorCode = GetLastError();
        if ( errorCode != ERROR_INSUFFICIENT_BUFFER ) {
            //SetupDiGetDeviceInterfaceDetail failed 
            return 0;
        }
    }

   

    interfaceDetailDataSize = reqSize;
    
	interfaceDetailData = (PSP_DEVICE_INTERFACE_DETAIL_DATA) malloc (interfaceDetailDataSize);
    
	if ( interfaceDetailData == NULL ) 
	{
        
        return 0;
    }
    interfaceDetailData->cbSize = sizeof (SP_INTERFACE_DEVICE_DETAIL_DATA);

    disk_status = SetupDiGetDeviceInterfaceDetail (
                  hIntDevInfo,               // Interface Device info handle
                  &interfaceData,           // Interface data for the event class
                  interfaceDetailData,      // Interface detail data
                  interfaceDetailDataSize,  // Interface detail data size
                  &reqSize,                 // Buffer size required to get the detail data
                  NULL);                    // Interface device info

    if ( disk_status == FALSE ) {
        
        return 0;
    }

   

    serial_handle = CreateFile(
                interfaceDetailData->DevicePath,    // device interface name
                GENERIC_READ | GENERIC_WRITE,       // dwDesiredAccess
                FILE_SHARE_READ | FILE_SHARE_WRITE, // dwShareMode
                NULL,                               // lpSecurityAttributes
                OPEN_EXISTING,                      // dwCreationDistribution
                0,                                  // dwFlagsAndAttributes
                NULL                                // hTemplateFile
                );

Open device successfullt, but read file return 0;

success = ReadFile(serial_handle,&rxBuffer,max_rx_size,&read_nbr,NULL);

please help me where i m wrong

David Crow6-Mar-12 2:32

6-Mar-12 2:32

Le@rner wrote:
please help me where i m wrong

You've failed to say what is wrong.

Have you used the debugger to step through the code?

Le@rner6-Mar-12 17:15

6-Mar-12 17:15

ya ReadFile return Zero.

David Crow6-Mar-12 17:53

6-Mar-12 17:53

And then what did GetLastError() return?

Le@rner12-Mar-12 20:41

12-Mar-12 20:41

GetLastError return "0x00000456 The media in the drive may have changed. "

David Crow13-Mar-12 3:18

create statusBar in dialog problem

13-Mar-12 3:18

Does this happen after the system comes out of Standby mode?

appollosputnik29-Feb-12 15:31

Re: create statusBar in dialog problem

29-Feb-12 15:31

I am trying to create a statusBar in the dialog but it's returning false. not creating the status bar please tell me whats going wrong in this. Thanks for any help. I am creating the status bar in the OnInitDialog() function

[code]

CStatusBar m_wndStatusBar; // member variable in the dialog header.

BOOL CDlgsViewDlg::OnInitDialog()
{
CDialog::OnInitDialog();
if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return FALSE; // fail to create
}

m_wndStatusBar.SetPaneText(0,L"MainWindow Initialized");
}
[/code]

it's returning false. please help me.

chenxi_129-Feb-12 18:00

chenxi_1

29-Feb-12 18:00

see http://www.cppblog.com/besterChen/archive/2009/04/03/78846.html[^]
Language： chs

Re: create statusBar in dialog problem

Chandrakantt29-Feb-12 18:53

Chandrakantt

29-Feb-12 18:53

You can create status bar by calling

m_wndStatusBar.Create(WS_CHILD|WS_VISIBLE|SBT_OWNERDRAW,
    CRect(0,0,0,0), this, 0);

You can have a look at Toolbar & StatusBar on Dialog[^]

Re: create statusBar in dialog problem

appollosputnik1-Mar-12 0:19