C / C++ / MFC

Re: about "SDK" and "header file"

12-Feb-04 2:27

oliverlin wrote:
...if I use the SDK, other programmer will have to use the SDK too in order to compile my code

Nothing wrong with that, unless there is a fundamental reason for not using it.

A rich person is not the one who has the most, but the one that needs the least.

oliverlin12-Feb-04 17:31

oliverlin

12-Feb-04 17:31

Yes, out software environment has been fixed.

Since this was a small part of a large project, a large number of SDK upgrade would have to be done.

-----------------
Today, memory either forgets things when you don't want it to, or remembers things long after they're better forgotten.

Create ODBC

rasha200310-Feb-04 22:53

rasha2003

10-Feb-04 22:53

hi ..
i am trying to create an ODBC for database from vc++ application where i specify DSN i want and path for MSSQl
server database (data file *.MDF)
but i keep give me the error message the it "Cannot create data source"

this is the code:
=================
CString mdbpath=(CString)m_EFPATH;
char* szDesc;
int mlen;
szDesc=new char[256];
sprintf(szDesc,"DSN=%s: DESCRIPTION=: FIL=SQL Server: DEFAULTDIR=: DBQ=%s\0",m_EDSN,mdbpath);
mlen = strlen(szDesc);
int numPath=0;
for (int i=0; i

Re: Create ODBC

David Crow11-Feb-04 4:15

11-Feb-04 4:15

Two lines of code that are suspect:

sprintf(szDesc,"DSN=%s\0DBQ=%s\0", m_EDSN, mdbpath);
...
if (FALSE == SQLConfigDataSource(NULL, ODBC_ADD_DSN, "SQL Server", szDesc))

If SQLConfigDataSource() returns FALSE, what does SQLInstallerError() return?

A rich person is not the one who has the most, but the one that needs the least.

Re: Create ODBC

rasha200311-Feb-04 18:10

rasha2003

11-Feb-04 18:10

it returns SQL_NO_DATA

Re: Create ODBC

David Crow12-Feb-04 2:25

12-Feb-04 2:25

Odd, as the docs indicate it should be one of eight ODBC_ERROR_xxx error codes.

A rich person is not the one who has the most, but the one that needs the least.

sprintf

styve10-Feb-04 22:24

styve

10-Feb-04 22:24

Hi!

Is there a command that works like sprintf, but it is like strcat? Because I will catenate (probably wrong spelling) some hex numbers to the same char value.

Have a nice day,
Stefan

jan larsen10-Feb-04 22:50

jan larsen

10-Feb-04 22:50

You can just use sprintf like this:

char    buffer[1024];
char *  tmp;
tmp =   buffer;
tmp +=  sprintf(tmp, "Line %d\r\n", 1);
tmp +=  sprintf(tmp, "Line %d\r\n", 2);
tmp +=  sprintf(tmp, "Line %d\r\n", 3);

Another, and better, solution is to use a strstream:

strstream     out;
out<<"Line "<<1<<endl;
out<<"Line "<<2<<endl;
out<<"Line "<<3<<endl;

"After all it's just text at the end of the day. - Colin Davies

"For example, when a VB programmer comes to my house, they may say 'does your pool need cleaning, sir ?' " - Christian Graus

Robert A. T. Káldy10-Feb-04 22:58

Robert A. T. Káldy

10-Feb-04 22:58

If you use fixed number of hex numbers, use:

<br />
sprintf("%c%x%x", 'c', 0x544, 0xbff)<br />

or if you use variable number:

<br />
ostrstream os;<br />
os << 'c' << hex << 0x544 << 0xbff << ....<br />

and the char* string you obtain by os.str()

Robert-Antonio

"I launched Norton Commander and saw, drive C: on the left, drive C: on the right...Damn, why I need two drives C:???So I formatted one..."

David Crow11-Feb-04 4:27

11-Feb-04 4:27

Here's a somewhat cheesy example:

char szBuffer[128];
for (int x = 0, num = 1; x < 10; x += 2)
{
    sprintf(&szBuffer[x], "%02x", num);
    num *= 2;
}

A rich person is not the one who has the most, but the one that needs the least.

gdi+ in C++, Bitmap::FromStream

Peter Weyzen11-Feb-04 7:47

Peter Weyzen

11-Feb-04 7:47

or even another choice:

CString S;
for ( int x = 0, num = 1; x < 10, x += 2 )
{
S.AppendFormat( _T("%02x"), num );
num *= 2;
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<A HREF="http://www.santacruznetworks.com">Santa Cruz Networks</A>

zecodela10-Feb-04 21:33

zecodela

10-Feb-04 21:33

hi,
i am using gdi+ in VC++ 6.0. i want to know how can i use Bitmap::FromStream ? it need to pass a Stream pointer. i have a bitmap array already. but, how can i turn it into such a stream?

any help?

thanks!
jim

Re: gdi+ in C++, Bitmap::FromStream

Bo Hunter11-Feb-04 6:47

Bo Hunter

11-Feb-04 6:47

Have you checked out these?

Bitmap::FromStream

CreateStreamOnHGlobal

Thank You
Bo Hunter

HBITMAP to Jpeg data stream?

Arcrest10-Feb-04 21:12

Arcrest

10-Feb-04 21:12

i want to get jpeg data stream from a valid HBITMAP and transfer it through network. I can do this by first creating a jpg file and then reading the data from the file and at last sending it out,but it is not effective,so is there a more effective solution?(i don't want to get into the complexity of jpeglib)

(English is not my native language,sorry for my bad English)

basementman11-Feb-04 7:01

basementman

11-Feb-04 7:01

Using the Intel Jpeg Library (IJL), you can convert to jpeg directly in-memory, allowing you to convert from DIB to jpeg and write the jpeg out to whatever medium you wish (file, socket, pipe, etc.).

onwards and upwards...

Arcrest11-Feb-04 15:34

Arcrest

11-Feb-04 15:34

Thank you
a little problem,it seems that IJL only deals with the 24bit Jpeg files

basementman12-Feb-04 3:49

basementman

12-Feb-04 3:49

Yes, that is correct. You will need to convert to a 24 bit jpeg. There is a really nice class called CDibImage (on CP, I think or available at http://www.naughter.com/[^]) by P.J. Naughter that makes these types of things really easy.

onwards and upwards...