C / C++ / MFC

18-Jun-07 19:06

Im not sure see How a C++ compiler implements exception handling[^] does helpful?

WhiteSky

convert

p_18-Jun-07 18:05

18-Jun-07 18:05

hi all

please tell me how to convert string datatype into blob in MFC and backend is mysql

thanks Rose | [Rose]

Hamid_RT18-Jun-07 19:13

18-Jun-07 19:13

Same question?

WhiteSky

p_18-Jun-07 19:37

18-Jun-07 19:37

but no answer

p_18-Jun-07 20:05

18-Jun-07 20:05

please give me some hint

Hamid_RT18-Jun-07 20:42

18-Jun-07 20:42

See this[^] thread does helpful?

WhiteSky

Re: Monitor tool required

David Crow19-Jun-07 4:55

David Crow

19-Jun-07 4:55

Examples are plentiful:

http://dev.mysql.com/tech-resources/articles/vb-blob-handling.html[^]

http://support.microsoft.com/kb/258038[^]

http://www.devarticles.com/c/a/MySQL/MySQL-and-BLOBs/[^]

http://mysql.org/doc/refman/5.0/en/connector-net-using-blob.html[^]

http://publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp?topic=/com.ibm.db2.udb.doc/ad/r0007628.htm[^]

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Monitor tool required

ramesh_hp200618-Jun-07 17:50

ramesh_hp2006

18-Jun-07 17:50

I require a monitor tool which does following,

a. attach to a running process
b. list out windows api calls and non-windows function calls with module
name called in order
c. list out what are the function parameters, input to the function,
output from the function, return value from the function
d. changes color if a function is in error state

Do anyone know any such tool exist?
Your knowledge is appreciated

Hamid_RT18-Jun-07 19:10

how can i convert ms-word to bmp by program???

18-Jun-07 19:10

I dont think you can find this program can you explain why do you need to this program?

WhiteSky

hua_hero0718-Jun-07 15:37

hua_hero07

18-Jun-07 15:37

how can i convert ms-word to bmp by program???

Re: how can i convert ms-word to bmp by program???

Christian Graus18-Jun-07 15:53

Christian Graus

18-Jun-07 15:53

Not sure that you can, except by launching word and doing a screen capture

Christian Graus - Microsoft MVP - C++
Metal Musings - Rex and my new metal blog
"I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

sendASPI32Command returns SS_ASPI_IS_BUSY

aks.18-Jun-07 14:01

aks.

18-Jun-07 14:01

Hi,
I am using sendASPI32Command for writing data to CD. But for a particular size of data sendASPI32Command returns SS_ASPI_IS_BUSY error. The error occurs when writes the last track data.
Could u pls tell in which condition this case occurs.Please help..........

AJay

Detecting Windows Session Change

Akin Ocal18-Jun-07 13:43

Akin Ocal

18-Jun-07 13:43

How can i detect if a user logoffs or switches ?

Thankl you very much...

Re: Detecting Windows Session Change

David Crow18-Jun-07 16:23

David Crow

18-Jun-07 16:23

Is the ISensLogon interface of any help?

"A good athlete is the result of a good and worthy opponent." - David Crow

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

How can i verify that if a disc is USB disc or not

Akin Ocal18-Jun-07 13:38

Akin Ocal

18-Jun-07 13:38

How can i do this in Win32API ?

Thank you very much...

Re: How can i verify that if a disc is USB disc or not

Iain Clarke, Warrior Programmer19-Jun-07 0:49

Re: How can i verify that if a disc is USB disc or not

19-Jun-07 0:49

GetDriveType will help you get some of that information, but I doubt you'll be able to easily get more than that.

After all, Win32 doesn't have any knowledge of how the device driver is working between the Write/Open/IoCtl command and its physical workings. Any driver can call CreateDoSdevice et al to create a file endpoint....

Sorry to not give you exact help.

Iain.

Matthew Faithfull19-Jun-07 5:07

Matthew Faithfull

19-Jun-07 5:07

It's not simple but it can be done. I can't give you the code because it's owned by my employers but these basic steps should help you along.

Start by getting the drive type from your drive letter as previously suggested. For USB drives this will always be DRIVE_REMOVABLE or DRIVE_FIXED, anything else and it can be discarded at this stage.

Then you need to open a handle to the Volume with CreateFile and a file name like \\.\E:
(remember to double the slashes when you put this in a C++ string)

You can use the returned device handle to get a VOLUME_DISK_EXTENTS structure for the volume using DeviceIOControl with a IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS control code.

In the Disk Extents structure there is a DiskNumber you can now associate this with the drive letter you started with and remember it.

Now the hard part, is it USB?

The next step is to enumerate all the USB devices attached to the system using SetupDiGetClassDevs with &GUID_DEVCLASS_USB and SetupDiGetClassDevs with &DiskClassGuid to get all the disk devices. For each device use the returned handle to get Device information with SetupDiEnumDeviceInterfaces and SetupDiGetDeviceInterfaceDetail. You end up with a SP_DEVICE_INTERFACE_DETAIL_DATA structure which contains a device path. Open this path with CreateFile which gives you a device handle.
Use the device handle with DeviceIoControl and IOCTL_STORAGE_QUERY_PROPERTY and cast the result to a PSTORAGE_ADAPTER_DESCRIPTOR. This contains a BusType which will be 0x7 for USB
You can use the same device handle you called CreateFile with to do a DeviceIoControl with IOCTL_STORAGE_GET_MEDIA_TYPES_EX. Cast the returned buffer to a PGET_MEDIA_TYPES to get a structure with DeviceType. If DeviceType == FILE_DEVICE_DISK then you have a USB disk but you still don't know which drive letter it corresponds to. To determine this you need to pass the same device handle to DeviceIoControl with IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS and compare the DiskNumber in the result with the pair of DiskNumber and Drive letters that you worked out in the first step.

If this sounds like a joke it is not. I don't know any easier way to do this (took 2 weeks to develop) although I'd like to. You will need some headers from the Windows 2000 or later DDK as well for some of the GUIDS and constants. This will not work before Windows 2000. Good luck Wink | ;)

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: How can i verify that if a disc is USB disc or not

Akin Ocal19-Jun-07 5:47

Akin Ocal

19-Jun-07 5:47

Thank you very much for your great reply effort !

Re: How can i verify that if a disc is USB disc or not

Iain Clarke, Warrior Programmer19-Jun-07 6:05

Re: How can i verify that if a disc is USB disc or not

19-Jun-07 6:05

I'm officially impressed. I knew this would be non-trivial, and didn't think it would actually be possible!

Iain.

Matthew Faithfull19-Jun-07 6:17

Matthew Faithfull

19-Jun-07 6:17

Thanks, It is definitely possible although I can't gaurentee reliability especially in the presence of many and varied dodgy USB devices and exotic drive configurations. USB is such a mess.
I had to implement this and a bit more to auto detect USB drives inserted in a PC and show them by Drive letter. Explorer does this all the time so it should be trivial Unsure | :~

Microsoft do so like to make our lives interesting though Big Grin | :-D

Nothing is exactly what it seems but everything with seems can be unpicked.

Re: How can i verify that if a disc is USB disc or not

Iain Clarke, Warrior Programmer19-Jun-07 22:50

Re: How can i verify that if a disc is USB disc or not

19-Jun-07 22:50

This has got me interested!

Explorer doesn't need to go through these conniptions. It just monitors WM_DEVICECHANGE. I just made a quickie MFC app, and added a few lines which detect drives being added and removed:

#include <dbt.h>
...
ON_WM_DEVICECHANGE ()
...
BOOL CMainFrame::OnDeviceChange( UINT nEventType, DWORD dwData )
{
	BOOL bReturn = CWnd::OnDeviceChange (nEventType, dwData);

	TRACE1("Event %i\n", nEventType);

	DEV_BROADCAST_VOLUME *volume = (DEV_BROADCAST_VOLUME *)dwData;

	if (nEventType == DBT_DEVICEARRIVAL)
	{
		if (volume->dbcv_devicetype == DBT_DEVTYP_VOLUME)
		{
			for (int n = 0; n < 32; n++)
			{
				if (IsBitSet (volume->dbcv_unitmask, n))
				{
					TRACE1("Drive %c: Inserted\n", n + 'A');
				}
			}
		}
	}

	if (nEventType == DBT_DEVICEREMOVECOMPLETE)
	{
		if (volume->dbcv_devicetype == DBT_DEVTYP_VOLUME)
		{
			for (int n = 0; n < 32; n++)
			{
				if (IsBitSet (volume->dbcv_unitmask, n))
				{
					TRACE1("Drive %c: Removed\n", n + 'A');
				}
			}
		}
	}

	return bReturn;
}

Which works nicely. I tested on a memory stick which actually adds two partitions. Either yaking it out, or nicely removing using the gizmo on the systray works nicely.

I think I may just turn this into a mini article!

Iain.

Matthew Faithfull20-Jun-07 0:59

Matthew Faithfull

20-Jun-07 0:59

Looks good. I'll take a peek at the article when I'm not supposed to be doing real work. I used the Device Notification stuff as well and it does work pretty well. If you use a hub and something crashes or the hub crashes it all goes to *&^%$ but there's not much you can do about that. The trick was I only wanted drives to appear if they were definitely USB connected and removable because for others reasons they have to be compatible with our printers, USB connection only, for us to care about displaying them in the desktop product. I had to be sure to rule out anything Firewire or Hotplug SCSI or hard wired flash card slots, while allowing for flash cards, Hard disks, zip disks etc that happened to be attached via USB. OMG | :OMG:

A pretty specific requirement but it happened to be a nice fit with the OPs problem. I would like to put up an article detailing the process myself but I'd have to get my employer to Open source the code Sigh | :sigh:

Not much chance of that I'm afraid.

Explorer will be using this but it must be doing a little more because it shows an icon dependent on drive type to some degree. The other trick is, Explorer is running 'all the time'. What happens when the volume is already there before your app starts up WTF | :WTF:

Nothing is exactly what it seems but everything with seems can be unpicked.

Multiple Windows inside single Splitter Window

StevenS_Dev18-Jun-07 13:30

StevenS_Dev

18-Jun-07 13:30

Splitters seem like a popular topic. I have found several examples here, elsewhere, and in the forums. But I can't seem to find any which answer my question.

I am converting a Borland C++ application to MFC. The application has a split window with a Tree on the left side, and multiple windows on the other. Basically, the right side is similar to MDI allowing for multiple windows to display at one time.

From all my research today, it seems like splitters allow for only a single window at a time and the window will fill/maximize the entire split window. Is there some way to get multiple windows within a split window?

I may start looking at Borland's internal code to find out how they do it. Or my boss may end up deciding to scrap the multiple window idea. I suspect it is not really a major feature as most people probably maximize the window anyway.

Thanks in advance for help or pointers.

Re: Multiple Windows inside single Splitter Window

StevenS_Dev18-Jun-07 15:29

StevenS_Dev

18-Jun-07 15:29

I think I may have found what I need. I don't believe what I'm asking is possible. I finally found a thread over on MSDN[^] with someone asking a very similar question.

I am now going to take the approach of using a CDialogBar[^].

Still open to suggestions, though.

Re: Multiple Windows inside single Splitter Window

Iain Clarke, Warrior Programmer19-Jun-07 0:52