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I want to write a virtual cd-rom like Deamon tools(DAEMON'S HOME), but quite simple one. I just have a little basis on driver development.
What should i do if i want write such a virtual cd-rom? Could you please give me some advices or some links on internet, thanks!
Go go go, enemy sighted!
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I need to lock a file stream(opened using fopen) in exclusive write lock. I came across a code segment where the functions flock() and fcntl() were used to lock the file. I need to have the header files unistd.h and sys/file.h in order to use these functions but these header files are not available. I am using Windows XP and Microsoft Visual C++. From where can I download these files?
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I think the flock() function, unistd.h and file.h header files are only for Unix. In Windows, you can try _lock_file() function. Another way is _locking() function. For first argument, specify the value returned by _fileno().
Alternatively you can try LockFile function as described at http://msdn.microsoft.com/library/en-us/dnucmg/html/UCMGch09.asp?frame=true[^].
Hope it helps.
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Thanks for the hints. I tried using both _locking() and LockFile(). I did not use _lock_file() since it returns a void so I could not find if the file is opened by some other process or not.
if(_locking(_fileno(fd), LK_NBLCK, 10L )!=-1)
printf("Lock obtained on file!");
is always returning "Lock obtained on file!" even if the file is open by some other process and
if(LockFile(fd,0,0,0xffff0000,0))
printf("Lock obtained on file!");
else
printf("Could not obtain lock on file!");
is always printing "Could not obtain lock on file!" even if the file is not being used by any other process. I think the problem is with how many bytes to specify to be locked. I want exclusive lock on the whole file so as to ensure that I don't write to a file when the same is opened by some other process.
-- modified at 2:13 Thursday 22nd June, 2006
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plz help me
plzzzzzzzzzzzzzzzzzzzz\
i dont understand by doing so the text movws its position once but does not contineously moves i want that it moves regularly plz send me code to help
\\\\\\
i hav made a dialog based application
now i want that onmy dialog i add "hello how r u" through Static control
now i want that it moves on the screen all the time fron left to right
like screen saver but i dont know how to do it
plz tel me and send me code to solve my problem
Please mail me
-- modified at 3:16 Wednesday 21st June, 2006
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1.change the the id of static ctrl to some value say IDC_MOVING_TEXT
2.Set a timer using the SetTimer Function in the OnInitdialog function
3. In the on timer function call
GetDlgItem( IDC_MOVING_TEXT )->SetWindowPos( 0, x, y, 0,0, SWP_NOSIZE|SWP_NOZORDER);
decrement or increatement the x value to make the control move....
nave
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Set a timer using the SetTimer Function in the OnInitdialog function
wat how i define one function inside other as u tel me to set timer using settime function inside OnInitdialog function
plz send me code for help
Please mail me
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If u use MFC, add a handler for WM_TIMER and Call SetTimer to set interval
if SDK and callback function for WM_TIMER
Use SetTimer & KillTimer functions
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plz can u send me code which help me as i do with this but it changes its position
and i want to move text regularly
plzzzzzzz
Please mail me
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What do you need its not hard
whitesky
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You can use MoveWindow() to set the coordinates of the static control
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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plz can u tel me some example of theat how it works
Please mail me
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Suppose you have a dialog with a button on it. The dialog also has a static control with a variable associated as m_statictext. Now when you click the button the window changes its position. Say moves to (0,0) with some size.
This is only a general example. You will have to create a timer and then keep on changing the position of the window as per your requirement.(Also check for bounds)
//To test you can write this code on the click of the button and see the window changing its position
m_statictext.MoveWindow(CRect(0,0,100,100),1);
Somethings seem HARD to do, until we know how to do them.
_AnShUmAn_
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yes use MoveWindow or SetWindowPos
and if you need to timer in your program use SetTimer(500,1,NULL);(of course i suggest see MSDN for SetTimer)
then declare WM_TIMER message
void CAnswer::OnTimer(UINT nIDEvent)
{
}
in the end use KillTimer(500);
----------------
for static control insert one static in form and change id and declare a variable for this control
whitesky
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Hi Friends,
I wanna some help on WinInet Programming.
I am writing a VC++ client which is supposed to communicate a web Server
written in C#.net.
I am able to send a request to Web Server but how to read the contents send by
WebServer can anybody help me in this ?
Following is my code:
HINTERNET hOpen,hConnect,hRequest;
BOOL retval;
DWORD dwErrorCode;//=12032;
CString data="cmdCreateSessionID";
hOpen=InternetOpen("HttpApp/1.0",
INTERNET_OPEN_TYPE_PRECONFIG,NULL,NULL,0);
hConnect=InternetConnect(hOpen,
SERVER_LAN_NAME,4000,
NULL,NULL,
INTERNET_SERVICE_HTTP,0,0);
CString method="POST";
CString url="index.html";
DWORD dwFlags=0;
hRequest=HttpOpenRequest(hConnect,method,url,
NULL, NULL, NULL, dwFlags, 0);
DWORD R1=GetLastError();
HttpSendRequest(hRequest,NULL,0,data.GetBuffer(),
data.GetLength());
dwErrorCode = hRequest ? ERROR_SUCCESS : GetLastError();
CString lpBuffer;
INTERNET_BUFFERS dwStruct;
DWORD dwNumberOfBytesToRead,dwNumberOfBytesRead;
dwNumberOfBytesRead=dwNumberOfBytesToRead=0;
BOOL retReadFile=InternetReadFile(hRequest,&lpBuffer,dwNumberOfBytesToRead,
&dwNumberOfBytesRead);
In the InternetReadFile function i am unable to read any buffer.
With Rgds
VC++
Girish
Software Developer
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I want to read from Excel file. Pls provide me with any class or sample project that i can use with my application.
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you can find the CRecordset in the web...
it can open the excel as database
void CExDlg::OnRead()
{
// TODO: Add your control notification handler code here
CDatabase database;
CString sDriver;
CString sDsn;
CString sFile,sPath;
//find the excel in main exe folder
GetModuleFileName(NULL,sPath.GetBufferSetLength (MAX_PATH+1),MAX_PATH);
sPath.ReleaseBuffer ();
int nPos;
nPos=sPath.ReverseFind ('\\');
sPath=sPath.Left (nPos);
sFile = sPath + "\\Demo.xls"; //name of excel
sDsn.Format("ODBC;DRIVER={%s};DSN='';DBQ=%s", sDriver, sFile);
TRY
{
database.Open(NULL, false, false, sDsn);
CRecordset recset(&database);
CString sSql;
sSql = "SELECT item FROM Regt WHERE item = 'iwant' "; //
// exe SQL
recset.Open(CRecordset::forwardOnly, sSql, CRecordset::readOnly);
BYTE line = 1;
// »ñÈ¡²éѯ½á¹û
while (!recset.IsEOF())
{
//¶ÁÈ¡ExcelÄÚ²¿ÊýÖµ
recset.GetFieldValue("item", sitem); // read out the item
line++;
//ÏÔʾ¼ÇÈ¡µÄÄÚÈÝ
m_listbox.AddString( sitem);
// ÒƵ½ÏÂÒ»ÐÐ
recset.MoveNext();
}
// close
database.Close();
}
CATCH(CDBException, e)
{
// Êý¾Ý¿â²Ù×÷²úÉúÒ쳣ʱ...
AfxMessageBox("error: " + e->m_strError);
}
END_CATCH;
}
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Hi All,
I am unable to find which library file(.lib) need to use for this program.
Here i am including my code.
#include <stdio.h>
#include <fileref.h>
#include "tag.h"
using namespace std;
using namespace TagLib;
int main(int argc, char *argv[])
{
TagLib::FileRef f("DEV.mp3");
if(!f.isNull() && f.tag()) {
TagLib::Tag *tag = f.tag();
cout << "-- TAG --" << endl;
cout << "title - \"" << tag->title() << "\"" << endl;
cout << "artist - \"" << tag->artist() << "\"" << endl;
cout << "album - \"" << tag->album() << "\"" << endl;
cout << "year - \"" << tag->year() << "\"" << endl;
cout << "comment - \"" << tag->comment() << "\"" << endl;
cout << "track - \"" << tag->track() << "\"" << endl;
cout << "genre - \"" << tag->genre() << "\"" << endl;
}
return 0;
}
can anyone please help me for this problem.
waiting 4 ur earlier reply
bye
Trinadh
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tag.lib? 
Maybe check the documentation associated with that library and see what you're supposed to use. Is it an sdk that you need to install?
- S
50 cups of coffee and you know it's on!
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Thanx for your response.
I have downloaded TagLib 1.4, but i couldn't found any .lib file in that. I think that i have to use tag.lib or taglib.lib file.
If u know the path where it exists can u please give me the path where it exists. I haven't used any SDK, i just used TagLib namespace.
http://developer.kde.org/~wheeler/taglib.html. I found whole documentation about TagLib in this link but It doesn't mention which .lib file i need to include.
waiting 4 ur reply.
regards
Trinadh.
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Maybe TagLib is supplied in source files ? So, you just need to add the source files to your project and that will work (not sure if this is the case thought)
Cédric Moonen
Software developer
Charting control
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I have supplied source files taglib.h and tag.h, i am getting linker error like this.I need to include .lib file in link part of project->settings along with including .h file.
errors:
tagreader.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall TagLib::FileRef::~FileRef(void)" (??1FileRef@TagLib@@UAE@XZ)
tagreader.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall TagLib::String::~String(void)" (??1String@TagLib@@UAE@XZ)
tagreader.obj : error LNK2001: unresolved external symbol "class std::basic_ostream<char,struct std::char_traits<char=""> > & __cdecl operator<<(class std::basic_ostream<char,struct std::char_traits<char=""> > &,class TagLib::String const &)" (??6@YAAAV?$
basic_ostream@DU?$char_traits@D@std@@@std@@AAV01@ABVString@TagLib@@@Z)
tagreader.obj : error LNK2001: unresolved external symbol "public: class TagLib::Tag * __thiscall TagLib::FileRef::tag(void)const " (?tag@FileRef@TagLib@@QBEPAVTag@2@XZ)
Regards
Trinadh
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Do you have any .c or .cpp (or even .cxx) files supplied with ? If yes, you need to add these too to your project.
Cédric Moonen
Software developer
Charting control
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yes i have tag.cpp file. I have added that file to my project. Again i am getting linker errors as previous.
like
tagreader.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall TagLib::FileRef::~FileRef(void)" (??1FileRef@TagLib@@UAE@XZ)
tagreader.obj : error LNK2001: unresolved external symbol "public: virtual __thiscall TagLib::String::~String(void)" (??1String@TagLib@@UAE@XZ)
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