C / C++ / MFC Discussion Boards

Re: copy part out of the videobuffer (videohdr->lpData)

cmos4-Jun-08 14:02

4-Jun-08 14:02

"Did you ever figure this out? "

What ?

By the way, can anybody tell me what is the byteorder in the
VIDEOHDR buffer (lpData).

My Pictures are not upside down. But if i copy
240 lines instead of 480 lines, the upper half of my pictures
isnt there. For me it looks like, the line are stored buttom up in the
bytearray.
im totally confused with this.

Re: copy part out of the videobuffer (videohdr->lpData)

cmos5-Jun-08 6:07

cmos

5-Jun-08 6:07

it works.

bye,
cmos

open each dialog in the same position

lahom3-Jun-08 12:12

lahom

3-Jun-08 12:12

hi
i have created adialog based application where each of them call the other using DoModal().
my question is : if Dialog A is in some position on the screen and then called Dialog B...i want for Dialog B to take the same exactly position as Dialog A .(to be on top of it )...
how can i do that??
thanks

Re: open each dialog in the same position [modified]

bulg3-Jun-08 13:25

bulg

3-Jun-08 13:25

you want to..

<br />
RECT rect;<br />
CWhateverDlg nextDlg;<br />
...<br />
GetWindowRect(&rect);<br />
nextDlg.SetWindowPos(...) /* fill that in with the rect, here're the parameters:<br />
<a href="http://msdn.microsoft.com/en-us/library/a1yzfz6d(VS.80).aspx">http://msdn.microsoft.com/en-us/library/a1yzfz6d(VS.80).aspx</a>[<a href="http://msdn.microsoft.com/en-us/library/a1yzfz6d(VS.80).aspx" target="_blank" title="New Window">^</a>]*/<br />
<br />

and then maybe you'll have to..

<br />
nextDlg.RedrawWindow(&rect,NULL,RDW_UPDATENOW);<br />

this is in the InitDialog function of one of your Dlg's.

modified on Tuesday, June 3, 2008 7:53 PM

gethostname() function problems

koumodaki3-Jun-08 11:33

koumodaki

3-Jun-08 11:33

I am having trouble with gethostname(). The code compiles correctly but the function returns an unknown error. I have compiled on VC6 and .Net2005 platforms. While in VC6, the buffer remains empty, in .Net2005, it gives me unknown error. Why does this occur?

char myname[256];
memset((void*)myname,0,sizeof(myname);
if(!gethostname(myname, sizeof(myname)))
{
int _temp = WSAGetLastError();

if(_temp == WSAEFAULT)
MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAEFAULT ","Lamia",MB_OK);/* who are we? */
if(_temp == WSANOTINITIALISED)
MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSANOTINITIALISED ","Lamia",MB_OK);
if(_temp == WSAENETDOWN)
MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAENETDOWN ","Lamia",MB_OK);
if(_temp == WSAEINPROGRESS)
MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; WSAEINPROGRESS ","Lamia",MB_OK);
else
MessageBox(NULL,"Socket creation failed; Attempt to get host name failed; error unknown","Lamia",MB_OK);
}

Re: gethostname() function problems

Saurabh.Garg3-Jun-08 15:40

Saurabh.Garg

3-Jun-08 15:40

That is because there is no error!! You should look carefully at the value retuned by gethostname. From MSDN - "If no error occurs, gethostname returns zero. Otherwise, it returns SOCKET_ERROR and a specific error code can be retrieved by calling WSAGetLastError". So you should not use if(!gethostname()) it will go into if when function is successful.

-Saurabh

Re: gethostname() function problems

Jijo.Raj3-Jun-08 18:32

Jijo.Raj

3-Jun-08 18:32

Did you called WSAStartup() ? See the code block.

WORD wVersionRequested;
wVersionRequested = MAKEWORD( 2, 2 );

WSADATA wsaData;
int err = WSAStartup( wVersionRequested, &wsaData );

koumodaki wrote:
char myname[256];
memset((void*)myname,0,sizeof(myname);

BTW, one more suggestion, Instead of using memset, you can directly initialize the array. For instance,

char myname[256] = { 0 };

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: gethostname() function problems

sudhir_Kumar3-Jun-08 20:21

sudhir_Kumar

3-Jun-08 20:21

The Problem is only with the intialization of WINSOCK.

Sudhir Kumar

Re: gethostname() function problems

Hamid_RT4-Jun-08 20:33

Hamid_RT

4-Jun-08 20:33

See Getting Addresses IP informations[^] if its helpfuls for you.

LoadString Failure

kasi143-Jun-08 8:50

kasi14

3-Jun-08 8:50

Hi,

In my application LoadString works fine for English resource and fails for Japanese resource.

Could some one give me some info regarding this?

Thanks.

Re: LoadString Failure

David Crow3-Jun-08 8:55

David Crow

3-Jun-08 8:55

Member 1003415 wrote:
...fails for Japanese resource.

Have you tried calling GetLastError() to find out why?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: LoadString Failure

Jijo.Raj3-Jun-08 9:10

Jijo.Raj

3-Jun-08 9:10

DavidCrow wrote:
Have you tried calling GetLastError() to find out why?

Or more easily by adding @err,hr in watch window. Roll eyes | :rolleyes:

Regards,
Jijo.

_____________________________________________________

http://weseetips.com[^] Visual C++ tips and tricks. Updated daily.

Re: LoadString Failure

kasi143-Jun-08 9:25

kasi14

3-Jun-08 9:25

I am getting this LNK6004 compilation error.

i checked the link incrementally in the settings/link

but still the same problem

Re: LoadString Failure

David Crow3-Jun-08 10:08

David Crow

3-Jun-08 10:08

Member 1003415 wrote:
but still the same problem

Have you done a "rebuild all" since?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Cancel Print Jobs

zoiomon3-Jun-08 8:32

zoiomon

3-Jun-08 8:32

Hi
I know I can use SNMP to get a lot of information from printers. But I'd like to know if I can stop users from printing if the total number of printed pages exceed some value, say 4000.

The printer in use is Xerox Phaser 4510, there are about 50 of them. I've already tried changing configurations by code, using SNMP++ but many printer attributes are read-only (including the one's to set the print host access list).

I'm open to alternatives!

Thanks, Icaro.

Casting of _bstr_t to CString

SimplySane3-Jun-08 5:01

SimplySane

3-Jun-08 5:01

How do I cast(not the C style cast plz) _bstr_t to CString?

Re: Casting of _bstr_t to CString

toxcct3-Jun-08 5:11

toxcct

3-Jun-08 5:11

it's been asked so many times. check this[^] please.

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Casting of _bstr_t to CString

sudhir_Kumar3-Jun-08 5:17

sudhir_Kumar

3-Jun-08 5:17

Try this code:
_bstr_t bstr(_T("_bstr_t toCString test"));
CString str;
W2A(bstr, str.GetBuffer(256), 256);
strName.ReleaseBuffer();

Sudhir Kumar

Re: Casting of _bstr_t to CString

toxcct3-Jun-08 5:29

toxcct

3-Jun-08 5:29

you code is not consistent. W2A() gets only one parameter, which is the string to cast.

also GetBuffer() is in its good use here (rarely goodly used, to it's important to notice it !) but it's not necessary. prefer using the CString::operator=() instead, and don't use W2A() but T2A() if the source is unicode independent (otherwise, it's your _b_str construction which shouldn't use _T())

[VisualCalc][Binary Guide][CommDialogs] | [Forums Guidelines]

Re: Casting of _bstr_t to CString

ThatsAlok4-Jun-08 1:02

ThatsAlok

4-Jun-08 1:02

Please refer this :-
http://www.codeproject.com/script/Forums/View.aspx?fid=1647&msg=2582403[^]

Anyways who voted you down, let me equal it!

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/codeProject$$>

Re: Casting of _bstr_t to CString

David Crow3-Jun-08 6:48

David Crow

3-Jun-08 6:48

Have you even tried:

_bstr_t b("This is very hard.");
CString c1 = (LPCTSTR) b;
CString c2 = static_cast<LPCTSTR>(b);

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: Casting of _bstr_t to CString

CPallini3-Jun-08 7:49

CPallini

3-Jun-08 7:49

Hey man, no C-style cast plz!
(coz 2 simple, plz plz urgent!)
Big Grin | :-D

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

Re: Casting of _bstr_t to CString

Akt_4_U3-Jun-08 18:06

Akt_4_U

3-Jun-08 18:06

You can call copy() function of bstr to convert to CString.

eg:-
_bstr_t strTemp = "hi";
CString csTemp = strTemp.copy();

This will work fine.

akt

Re: Casting of _bstr_t to CString

ThatsAlok4-Jun-08 1:06

ThatsAlok

4-Jun-08 1:06

Akt_4_U wrote:
_bstr_t strTemp = "hi";
CString csTemp = strTemp.copy();

hai, thats a nice bit of coding, but there is small performance issue, let me explain you, _bstr__t::copy will make a copy of underlining BSTR variable and pass it to csTemp, who again make copy of same and destroyed newly created BSTR variable. thought for small string the performance issue would be less, but for big string, this could present problem

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You/codeProject$$>

Re: Casting of _bstr_t to CString

Mahesh Kulkarni3-Jun-08 20:57

Mahesh Kulkarni

3-Jun-08 20:57

_bstr_t bstrStart(bstr); <br />
<br />
CString s;<br />
<br />
s.Format(_T("%s"), (LPCTSTR)bstrStart);<br />
<br />
AfxMessageBox(s);

Try this. Hope this will work for u.

The secret of life is not enjoyment
but education through experience.
- Swami Vivekananda.

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