query

NTDEV
1

>HI,

I want to talk to a system device such as drive C: or the
floppy
under
Windows 98 and windows 95 . So far I have not found anything
that will allow me to do this.

How can i talk to floppy device or cd device.

If anybody knows about this pls reply back.

2

You can do this through VWIN32 interface. There are samples in MSDN for
this. Also there is a source sample in CodeGuru
(http://www.codeguru.com/system/ReadSector.html).

Hope this help you.

Regards
Bala

-----Original Message-----
From: nataraj r s [mailto:xxxxx@rediffmail.com]
Posted At: 15 September 2002 11:21
Posted To: ntdev
Conversation: [ntdev] query
Subject: [ntdev] query

HI,
I want to talk to a system device such as drive C: or the
floppy
under
Windows 98 and windows 95 . So far I have not found anything
that will allow me to do this.

How can i talk to floppy device or cd device.

If anybody knows about this pls reply back.

You are currently subscribed to ntdev as: xxxxx@avantisworld.com
To unsubscribe send a blank email to %%email.unsub%%

3

Hi,

I got your mail ,gone through website. and i wrote code to open a
cd rom and read the contents but It returns value(i’e acess is
denied) why
is it So? and i am sending part of code it should work on
windows98 platform.

hDevice = CreateFile ( “\\.\vwin32”, 0, 0, NULL, 0, 0, NULL
);

if ( (hDevice == INVALID_HANDLE_VALUE) )
{
MessageBox (“Cannot Open File \n”);
return;
}

DIOC_REGISTERS reg = {0};
DISKIO dio;

dio.dwStartSector = 1;
dio.wSectors = 2;
dio.dwBuffer = (DWORD)buffer;

reg.reg_EAX = 0x7305; // Ext_ABSDiskReadWrite
reg.reg_EBX = (DWORD)&dio;
reg.reg_ECX = -1;
reg.reg_EDX = 1; // Int 21h, fn 7305h drive numbers are
1-based
reg.reg_ESI = 0x0;
reg.reg_Flags = 1 ;
fResult =
DeviceIoControl(hDevice,VWIN32_DIOC_DOS_DRIVEINFO,
&reg, sizeof(reg),
&reg, sizeof(reg), &cb, 0);

// Determine if the DeviceIoControl call and the read
succeeded.
fResult = fResult && !(reg.reg_Flags & 1 );
if ( fResult == 0 )
{
CString error;
error.Format(“Reading Failed %i”, reg.reg_EAX);
AfxMessageBox (error);
}

else{

CString error;
error.Format("ReadingSuccess " );
AfxMessageBox (error);
}

4

I don’t know whether you can read CDROM sectors using this method. This
method is most useful reading Floppy disks. I am using ASPI interface to
read CDROMs. There is a sample, wnaspi32, in Windows 95 DDK.

-----Original Message-----
From: nataraj r s [mailto:xxxxx@rediffmail.com]
Posted At: 16 September 2002 13:10
Posted To: ntdev
Conversation: [ntdev] RE: query
Subject: [ntdev] RE: query

Hi,

I got your mail ,gone through website. and i wrote code to open a
cd rom and read the contents but It returns value(i’e acess is
denied) why
is it So? and i am sending part of code it should work on
windows98 platform.

hDevice = CreateFile ( “\\.\vwin32”, 0, 0, NULL, 0, 0, NULL
);

if ( (hDevice == INVALID_HANDLE_VALUE) )
{
MessageBox (“Cannot Open File \n”);
return;
}

DIOC_REGISTERS reg = {0};
DISKIO dio;

dio.dwStartSector = 1;
dio.wSectors = 2;
dio.dwBuffer = (DWORD)buffer;

reg.reg_EAX = 0x7305; // Ext_ABSDiskReadWrite
reg.reg_EBX = (DWORD)&dio;
reg.reg_ECX = -1;
reg.reg_EDX = 1; // Int 21h, fn 7305h drive numbers are
1-based
reg.reg_ESI = 0x0;
reg.reg_Flags = 1 ;
fResult =
DeviceIoControl(hDevice,VWIN32_DIOC_DOS_DRIVEINFO,
&reg, sizeof(reg),
&reg, sizeof(reg), &cb, 0);

// Determine if the DeviceIoControl call and the read
succeeded.
fResult = fResult && !(reg.reg_Flags & 1 );
if ( fResult == 0 )
{
CString error;
error.Format(“Reading Failed %i”, reg.reg_EAX);
AfxMessageBox (error);
}

else{

CString error;
error.Format("ReadingSuccess " );
AfxMessageBox (error);
}

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