C / C++ / MFC Discussion Boards

SachinBhave25-Apr-10 23:25

25-Apr-10 23:25

You can use Win32_CDROMDrive WMI class for retrieving all the information about CD ROM drive. Check out the MSDN page[^]

Re: how to get cdrom serial number

EverettJF26-Apr-10 0:24

EverettJF

26-Apr-10 0:24

yes, I just used Win32_CDROMDrive .
But the member VolumeSerialNumber is empty ,
and
SerialNumber
Data type: uint16
Access type: Read-only
Number supplied by the manufacturer that identifies the physical media. Example: WD-WM3493798728.
Windows Server 2003, Windows XP, Windows 2000, Windows NT 4.0, and Windows Me/98/95: This property is not available.

I am on Windows XP.

Thanks Smile | :)

Re: how to get cdrom serial number

SachinBhave26-Apr-10 0:42

SachinBhave

26-Apr-10 0:42

You can try using Win32_PhysicalMedia WMI class.
According to MSDN[^] it supports XP. Also there is no restriction documented on the OS for retrieving Serial number using Win32_PhysicalMedia.

Re: how to get cdrom serial number

EverettJF26-Apr-10 20:32

EverettJF

26-Apr-10 20:32

I tried Win32_PhysicalMedia , I do not know why I only got \\.\PHYSICALDRIVE0 ,
and almost all of the detailed infomation is NULL(such as "Name").
while I could get detailed infomation with Win32_CDROMDrive.
Thanks anyway Smile | :)

Re: how to get cdrom serial number [modified]

Michel Godfroid25-Apr-10 23:26

Michel Godfroid

25-Apr-10 23:26

You'll need to issue IOCTL_READ_TOC_EXT[^], with parameter CDROM_READ_TOC_EX_FORMAT_CDTEXT. Your serial number will then be in CDROM_CD_TEXT_PACK_DISC_ID, or CDROM_CD_TEXT_PACK_UPC_EAN, can't remember which one Smile | :)

. Note that this is for commercial music cds. (and it doesn't work for all).
There is also a bar code encoded in the innermost ring of CD's and DVD (flip one over, and take a close look at the inner ring, you'll see a huge barcode). This one is returned by http://msdn.microsoft.com/en-us/library/aa394346(VS.85).aspx[^] Serial Number (this works even for R/W devices, and it's how windows differentiates between CDs or DVDS used for writing.
So you'll have to decide which one you want. The first one is mostly used for commercial cdroms, and is encoded in the subtext layer on recent cdroms. You'll need a drive that can read subtext, most of them do nowadays.
The other one exists on all cd's/DVD's, again the drive must be capable of reading it. Recent ones all do.

modified on Monday, April 26, 2010 6:05 AM

Re: how to get cdrom serial number

EverettJF26-Apr-10 0:28

EverettJF

26-Apr-10 0:28

Nice !
I will test it !
Thanks a lot!

Self-Extractor

bharathkumarreddys25-Apr-10 21:51

bharathkumarreddys

25-Apr-10 21:51

How to write Selp Extractor programatically without using any third party tool using vc++.

Re: Self-Extractor

CPallini25-Apr-10 22:23

CPallini

25-Apr-10 22:23

Coding.
You need to write an executable that expands the previous compressed, data embedded in the executable itsef (so, I guess, you have to write the code implementing a compression/decompression algorithm).
Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: Self-Extractor

bharathkumarreddys25-Apr-10 22:31

bharathkumarreddys

25-Apr-10 22:31

windows doesnt provide any API for this?

Re: Self-Extractor

CPallini25-Apr-10 23:18

CPallini

25-Apr-10 23:18

Yes, but I don't know if the Delta Compression API [^] fits your needs. Have also a look at RtlCompressBuffer [^], RtlDecompressBuffer [^] functions.
Smile | :)

Re: Self-Extractor

Cedric Moonen25-Apr-10 22:38

Cedric Moonen

25-Apr-10 22:38

bharathkumarreddys wrote:
without using any third party tool

Why such a restriction ? There are some great free tools which do exactly what you want. Why do you want to rewrite it yourself ?

Cédric Moonen
Software developer

Charting control [v3.0]
OpenGL game tutorial in C++

Re: Self-Extractor

Tim Craig26-Apr-10 8:21

Tim Craig

26-Apr-10 8:21

Because the professor said he couldn't most probably. WTF | :WTF:

The wonderful thing about the Darwin Awards is that everyone wins, especially the members of the audience.

Re: Self-Extractor

C^hris L^osinger26-Apr-10 1:43

C^hris L^osinger

26-Apr-10 1:43

A Self-extracting Installer[^]

Creating a Self Extracting Executable[^]

Self-Extracting File Framework[^]

Pure WIN32 Self-Extract EXE Builder[^]

etc

image processing toolkits | batch image processing

Auto Saving of Clipboard image as Jpeg file

Chandrasekharan P25-Apr-10 21:03

Chandrasekharan P

25-Apr-10 21:03

Hi,

I have an application in which i am using a video for replay. Now when i use the print screen button i have to auto save this frame into a folder with some default name. Please give me some leads.

Re: Auto Saving of Clipboard image as Jpeg file

Code-o-mat25-Apr-10 22:46

Code-o-mat

25-Apr-10 22:46

How do you play the video? If you are using DirectShow then you can add a samplegrabber filter to the filter graph to grab frames from the stream as bitmaps, you can then use GDI+ or somesuch to save the bitmaps as JPEG to wherever you wish. Am not sure if you are able to "overdefine" the Print-Screen button but i would try to define a hotkey for it in my application.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> Sometimes you just have to hate coding to do it well. <

_bstr_t to std::string

gmallax25-Apr-10 20:39

gmallax

25-Apr-10 20:39

Hi,

how to convert from _bstr_t to std::string data type?

Thanx

Re: _bstr_t to std::string

Stuart Dootson25-Apr-10 20:47

Stuart Dootson

25-Apr-10 20:47

Use _bstr_t's char* extraction operator:

_bstr_t bStr(L"Hello");
std::string str((char*)bStr);

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: _bstr_t to std::string

gmallax25-Apr-10 20:59

gmallax

25-Apr-10 20:59

yes.Thanx

Re: _bstr_t to std::string

Nemanja Trifunovic26-Apr-10 5:14

Nemanja Trifunovic

26-Apr-10 5:14

Stuart Dootson wrote:
Use _bstr_t's char* extraction operator:

Haven't used _bstr_t at all, but from the documentation I would say the extraction operator merely gives a pointer to the internal data buffer. That's most probably not what he needs. He should convert the UTF-16 encoded _bstr_t string to some multibyte encoding first to store it to std::string.

utf8-cpp

Re: _bstr_t to std::string

Stuart Dootson26-Apr-10 6:14

Stuart Dootson

26-Apr-10 6:14

_bstr_t keeps an internal ASCII copy of the BSTR which is populated on demand. This copy is the internal data buffer that the char* extractor returns a pointer to. Therefore the answer I gave is what the OP needs and wants.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: _bstr_t to std::string

Nemanja Trifunovic26-Apr-10 6:44

Nemanja Trifunovic

26-Apr-10 6:44

Stuart Dootson wrote:
_bstr_t keeps an internal ASCII copy of the BSTR which is populated on demand

Interesting. Is it really ASCII, or whatever the system code page is ("ANSI")?

utf8-cpp

Re: _bstr_t to std::string

Stuart Dootson26-Apr-10 7:23

Stuart Dootson

26-Apr-10 7:23

No idea - didn't look quite that far into the source (comutil.h in your VS distribution, if you want to look).

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

how to pass Cstring to vb dll fuction in vc++

Member 365375125-Apr-10 20:28

Member 3653751

25-Apr-10 20:28

hi friend,

i have vb dll..in the vb dll one fuction f1;

Public Function f1(SendString As String) As String - this function taking as argument and return string...

how i will call in vc++;

CoInitialize(NULL);

hresult=CLSIDFromProgID(OLESTR("prjdll.clsdll"), &clsid);

_clsdll *t;
hresult=CoCreateInstance(clsid,NULL,CLSCTX_INPROC_SERVER,__uuidof(_clsdll),(LPVOID *) &t);

CString str= "000001";

t->f1(str); // this is crasing....

please help any body.

Re: how to pass Cstring to vb dll fuction in vc++

Stuart Dootson25-Apr-10 20:55

Stuart Dootson

25-Apr-10 20:55

You need to pass this as a BSTR (or possibly a BSTR encapsulated in a VARIANT). Open the VB DLL in the OLE/COM Object Viewer (use the File->View TypeLib... command) to see what parameter type the VB DLL is expecting to see for this call.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

CodeProject MVP for 2010 - who'd'a thunk it!

Re: how to pass Cstring to vb dll fuction in vc++

CPallini25-Apr-10 20:58

CPallini

25-Apr-10 20:58

You cannot pass a CString's instance, you've to pass a BSTR.
Anyway, the

Member 3653751 wrote:
t->f1(str);

call seems wrong (what is _clsdll type?)
Smile | :)

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