C / C++ / MFC Discussion Boards

Re: error LNK2001: unresolved external symbol "public: static bool

ptr_Electron28-May-09 0:06

28-May-09 0:06

so in my case I should do as below

Shared.h
bool bDone;

abc.h
#include "Shared.h"
extern bDone;

xyz.h
#include "Shared.h"

extern bDone;

If I am not worng

Re: error LNK2001: unresolved external symbol "public: static bool

Rajesh R Subramanian28-May-09 0:11

Rajesh R Subramanian

28-May-09 0:11

Are you going to wait until I say "yes, go ahead"? Roll eyes | :rolleyes:

Why not try it in the IDE and ask queries if it didn't work?

It is a crappy thing, but it's life -^ Carlo Pallini

Re: error LNK2001: unresolved external symbol "public: static bool

ptr_Electron28-May-09 1:04

ptr_Electron

28-May-09 1:04

Now I get the below error

error LNK2005: "bool m_Cursor" (?m
.exe : fatal error LNK1169: one or more multiply defined symbols found

Re: error LNK2001: unresolved external symbol "public: static bool

Rajesh R Subramanian28-May-09 1:12

Rajesh R Subramanian

28-May-09 1:12

//MyHeader.h
<a href="http://msdn.microsoft.com/en-us/library/dabb5z75(VS.80).aspx" target="_blank" title="New Window">__declspec</a>(<a href="http://msdn.microsoft.com/en-us/library/5tkz6s71(VS.80).aspx" target="_blank" title="New Window">selectany</a>) bool bVar;

//SomeFile.cpp
#include "MyHeader.h"
extern bool bVar = 0;

//AnotherFile.cpp
#include "MyHeader.h"
extern bool bVar = 1;

It is a crappy thing, but it's life -^ Carlo Pallini

Re: error LNK2001: unresolved external symbol "public: static bool

ptr_Electron28-May-09 3:05

ptr_Electron

28-May-09 3:05

No luck
now I got

.obj : error LNK2001: unresolved external symbol "bool m_BusyCursor"

Re: error LNK2001: unresolved external symbol "public: static bool

KarstenK28-May-09 0:14

KarstenK

28-May-09 0:14

do it all extern (declaration), AND "bool bDone = false;" in the Shared.cpp (instanciation)

Press F1 for help or google it.
Greetings from Germany

Re: error LNK2001: unresolved external symbol "public: static bool

ptr_Electron28-May-09 1:07

ptr_Electron

28-May-09 1:07

Now I get the below error

error LNK2005: "bool m_Cursor" (?m
.exe : fatal error LNK1169: one or more multiply defined symbols found

Re: error LNK2001: unresolved external symbol "public: static bool

KarstenK28-May-09 1:36

KarstenK

28-May-09 1:36

I dont believe that you have done what i wrote. Confused | :confused:

Make only 1 instance of your bool !!!!

Press F1 for help or google it.
Greetings from Germany

dialog that asks user where to save in.

002comp27-May-09 23:27

002comp

27-May-09 23:27

hello Friends

I want to save zip file.is any function that displays a dialog that asks user where to save in?Thanks In Advance.

Regards
Yogesh

Re: dialog that asks user where to save in.

_AnsHUMAN_ 27-May-09 23:37

_AnsHUMAN_

27-May-09 23:37

CFileDialog: Lets user select a filename to open or save

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: dialog that asks user where to save in.

002comp27-May-09 23:53

002comp

27-May-09 23:53

I m not using MFC .Please suggest me if any in c++ or win32?

Regards
Yogesh

Re: dialog that asks user where to save in.

Hamid_RT28-May-09 0:14

Hamid_RT

28-May-09 0:14

See GetSaveFileName.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: dialog that asks user where to save in.

KarstenK28-May-09 0:15

KarstenK

28-May-09 0:15

GetSaveFileName() will do the job

Press F1 for help or google it.
Greetings from Germany

GetDiskDrive

p_196027-May-09 22:38

p_1960

27-May-09 22:38

Hi,
Please let me know is there any API to Get the Drive in which im inserting the Disk..

Re: GetDiskDrive

Hamid_RT27-May-09 23:17

Hamid_RT

27-May-09 23:17

See GetLogicalDrives.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Re: GetDiskDrive

p_196027-May-09 23:27

p_1960

27-May-09 23:27

But how will i know in which drive my disk is inserted

Re: GetDiskDrive

Jacobb Michael28-May-09 0:06

Jacobb Michael

28-May-09 0:06

Hi Get GetLogicalDrives.

and use the folloing function to find out the drive type

UINT uDriveType = GetDriveType(sDriveLabel)

0 - Unknown drive
1 - Invalid Path
2 - Removable Drive
..etc

Regards
.....Jack

Re: GetDiskDrive

Naveen28-May-09 1:56

Naveen

28-May-09 1:56

Handle WM_DEVICECHANGE message

nave

[OpenedFileFinder] [My Blog]

Re: GetDiskDrive

p_196028-May-09 2:51

p_1960

28-May-09 2:51

If possible can u suggest me any sample regarding the same...

Re: GetDiskDrive

Naveen28-May-09 3:13

Naveen

28-May-09 3:13

See the below sample code in the MSDN Detecting Media Insertion or Removal[^]

nave

[OpenedFileFinder] [My Blog]

ZwOpenFile and hard disks

andrew_dk27-May-09 21:56

andrew_dk

27-May-09 21:56

I had code to access the serial number of a hard drive. I was running this in user mode, getting a handle to the drive as follows:

HANDLE hDrive ;
wchar_t driveName[128];

for(int i = 0; i < 16; ++i)
{
  wsprintf(driveName, L"\\\\.\\PhysicalDrive%d", drive);
  hDrive = CreateFile(driveName, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE , NULL, OPEN_EXISTING, 0, NULL);
  ...
}

I'm now trying to do the same thing in a driver. However I'm not sure how to open the actual drive. Currently the code I have is:

HANDLE hDrive;
WCHAR sDriveName[128];
OBJECT_ATTRIBUTES oa;
UNICODE_STRING usDriveName;
IO_STATUS_BLOCK iosb;
NTSTATUS Status = STATUS_UNSUCCESSFUL;
int drive;

for(drive = 0; drive < MAX_IDE_DRIVES; drive++)
{	
  _snwprintf(sDriveName, 128, L"\\Device\\Harddisk%lu", drive);
  RtlInitUnicodeString(&usDriveName, sDriveName);

  InitializeObjectAttributes(&oa, &usDriveName, OBJ_INHERIT, NULL, NULL);

 if(NT_SUCCESS(ZwOpenFile(&hDrive, FILE_ALL_ACCESS, &oa, &iosb, FILE_SHARE_READ | FILE_SHARE_WRITE, FILE_DIRECTORY_FILE)))
  {
    ...
  }
}

However the call to ZwOpenFile is failing with iosb.Status == 3.

Any ideas what I am doing wrong here??
Thanks.

Re: ZwOpenFile and hard disks

David Crow28-May-09 4:24

David Crow

28-May-09 4:24

andrew_dk wrote:
However the call to ZwOpenFile is failing with iosb.Status == 3.

Does that equal STATUS_WAIT_3?

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"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

Re: ZwOpenFile and hard disks

andrew_dk28-May-09 11:06

andrew_dk

28-May-09 11:06

The return value from the call to ZwOpenFile is STATUS_OBJECT_NAME_NOT_FOUND, so I guess the issue is I have the name wrong. More investigation needed on my part.

CHANGE THE POSITION OF CONTROL OR BUTTON

johnjitu27-May-09 21:54

johnjitu

27-May-09 21:54

Hello everybody

I have to modify a project made in MFC. I was trying to change the position of one Button in the ,i has made changes in file.rc (resource file ) ,but it not works ,it seems to like fix.

Please some body help me

Thanks in advance

Re: CHANGE THE POSITION OF CONTROL OR BUTTON

Chandrasekharan P27-May-09 22:09

Chandrasekharan P

27-May-09 22:09

Is the button visible for you. normally when you change the value in the .rc file the position of the control will change.

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