HELP! Winsock problem about the select function... - C / C++ / MFC Discussion Boards

JYoder10-Jun-04 4:11

10-Jun-04 4:11

Related to my earlier question, when the focus for a dialog is on a Date/Time Picker control, or any 'entry style' control for that matter, how can I make the 'Enter' key act like a data entry key. In other words, I simply want pressing 'Enter' to finalize data entry in that control and possibly send the cursor to the next tab stop.

Re: Date/Time Picker 'Enter' key behavior

bikram singh10-Jun-04 15:45

bikram singh

10-Jun-04 15:45

Try catching the DTN_WMKEYDOWN notification message. If that doesnt work, try using a message hook for messages like WM_KEYDOWN/WM_KEYUP...

HTH

Bikram Singh

Moving dialog window

marcomars10-Jun-04 3:44

marcomars

10-Jun-04 3:44

Hello I have a MFC dialog based app.

I need the user to move it by dragging in any point.

I tried with this code, but didn't work:

UINT CMainMenu::OnNcHitTest(CPoint point)
{
CRect r;
GetClientRect(&r);
ClientToScreen(&r);

if(r.PtInRect(point))
return HTCAPTION ;

return CDialog::OnNcHitTest(point);
}

Any suggestion about?

Thanks,
Marco.

by the way do you know why (only in release configuration)
i get an error from the application when executing the line

fscanf(fp,"%s",s);

when the line in the file is 9 chars or longer ????? Confused | :confused:

Thanks again Smile | :)

Re: Moving dialog window

David Crow10-Jun-04 5:32

David Crow

10-Jun-04 5:32

marcomars wrote:
Any suggestion about?

I assume you've seen this article.

marcomars wrote:
by the way do you know why (only in release configuration)
i get an error from the application when executing the line

fscanf(fp,"%s",s);

when the line in the file is 9 chars or longer ?????

Not without knowing at least what s is.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Moving dialog window

Diddy10-Jun-04 5:35

Diddy

10-Jun-04 5:35

It should

This:

UINT CSssDlg::OnNcHitTest(CPoint point)
{
CRect rc;
GetClientRect(&rc);
ClientToScreen(&rc);
return rc.PtInRect(point) ? HTCAPTION :
CDialog::OnNcHitTest(point);
}

Does. In the dialog its self - with ON_WM_NCHITTEST() added to the dialogs messgae map

Active X Control Error

Anonymous10-Jun-04 3:32

Anonymous

10-Jun-04 3:32

Hi,

I have build an ACTIVEX control using Visula Basic and i had taste it perfectly with Visual Basic Project But when I am trying to use it in VC++, It displays & functioning perfectly.
The ACTIVEX control consists of Directory Listbox and File Listbox.
Now, I want to access the value that user is selecting in ACTIVE X control in VC++ for further processing. For that I have created the Control Variable using ClassWizard that automatically create OCX header & Source files to access the OCX GET & LET properties.
I had created object of the OCX file and trying to call the Get Property.
My code snippet as below...

C_ocxFileExplorer objOcx;
objOcx.GetDirName();

It calls the function in _ocxfileExplorer.cpp as given below...

CString C_ocxFileExplorer::GetDirName()
{
CString result;
InvokeHelper(0x68030001, DISPATCH_PROPERTYGET, VT_BSTR, (void*)&result, NULL);
return result;
}

Now the problem is here.... I am getting an error in InvokeHelper function and when I am trying to Debug it...it shows me that ...

ASSERT(m_pCtrlSite != NULL); // not an OLE control (not yet, at least)

in WINOCC.cpp.

I will be very thanksful if anyone guide me...or any other idea to solve the problem.

Thanks in advance

SetGraphicsMode bug? Please try this code

CodeHead10-Jun-04 3:03

CodeHead

10-Jun-04 3:03

I am trying to figure out if this is a computer problem or a (another) bug in Windows. My ultimate goal is to print a mirror image of a calibration tape using SetWorldTransform. Displayed output is fine, but when printed, all text is simpy rendered upside-down. Simply calling SetGraphicsMode without any transforms causes the same bug! Can someone create a simple SDI app and past this code into the OnDraw function. You will get a triangle and the word 'test' displayed. Now do a print preview. Is the word 'test' now shown upside-down?
TIA
Eric

void CTransformView::OnDraw(CDC* pDC)<br />
{<br />
   pDC->SetMapMode(MM_LOENGLISH);<br />
   SetGraphicsMode(pDC->GetSafeHdc(), GM_ADVANCED);<br />
   pDC->MoveTo(150, -130);<br />
   pDC->LineTo(260, -110);<br />
   pDC->LineTo(260, -220);<br />
   pDC->LineTo(150, -130);<br />
   pDC->SetTextColor(RGB(0,0,0));<br />
<br />
   CFont num_font_upper;<br />
      num_font_upper.CreateFont(20 , 0, 0,0, FW_NORMAL, FALSE, FALSE, 0,<br />
         ANSI_CHARSET, OUT_TT_PRECIS, CLIP_DEFAULT_PRECIS | CLIP_LH_ANGLES,<br />
         PROOF_QUALITY, VARIABLE_PITCH |TMPF_TRUETYPE|FF_DONTCARE, "Arial");         <br />
<br />
   CFont *pFont = pDC->SelectObject(&num_font_upper);<br />
   pDC->TextOut(150,-130, CString("test"));<br />
   pDC->SelectObject(pFont);<br />
}<br />

HELP! Winsock problem about the select function...

JoeZhang10-Jun-04 2:49

JoeZhang

10-Jun-04 2:49

hi, guys,

In my current Winsock-based TCP program, on the client side, after I send my request data packet to the Server side using the send socket function, I attempt to get the socket status to see if it has something to read using the select function, and the select function always return 0 meaning the time limit expired on some users' computers, but it's just fine on another users' computers.

Why? Does anybody can tell me why and how to fix it? Thanks!

here's the code...

//...
SOCKET sckClient = socket(AF_INET, SOCK_STREAM, 0);

int nOne = 1;
setsockopt(sckClient, IPPROTO_TCP, TCP_NODELAY, (char *)&nOne, sizeof(int)); // just_say_no

struct sockaddr_in addr_to = { 0 };
//...
connect(sckClient, (struct sockaddr *)&addr_to, sizeof(addr_to));

char *buf;
//...
send(sckClient, (const char *)((char*)buf), nDataToSend, 0);

int nRetCode = ::select((int)sckClient + 1, &fdsRead, NULL, NULL, &tvTimeOut);
if (nRetCode==0 )
{ //ERROR: the time limit expired
//Here's the problem! some computers meet the error, but some don't! WHY???
}

recv(sckClient,(char *)buf,nDataToRead, 0);

//...

Re: HELP! Winsock problem about the select function...

valikac10-Jun-04 6:16

valikac

10-Jun-04 6:16

Does the second system receive the packets okay?

Kuphryn

A message of sorry

gamitech10-Jun-04 2:09

gamitech

10-Jun-04 2:09

With this message I would like to appologise to everyone that tried to download my article about the chat program. I will post it tonight and it will work. I am sorry for the dissapointment. It was a problem with the attachement. Frown | :(

gabby

Use of ASCII seperators for Windows 98 systems

J.B.10-Jun-04 1:49

J.B.

10-Jun-04 1:49

Hi guys,

I'm looking for some ASCII characters that can be used as some sort of separator delimiters. For example, I have few string fields I'd concatenate into one long string and put into CListBox. Then I'd need to be able to retrieve the string and break them up back to original fields. So ideally, those separators should be invisible on the display.

(S)Hi, The(E)(S) Code (E)(S)Project is Cool!(E)

would display as

Hi, The Code project is Cool!

where (S) is invisible start delimiter and (E) is the end delimiter.

I tried "Unit Separator" and "Record Separator" (0x1F and 0x1E respectively), they work fine in Windows XP, where these are not displayed. However, when I moved the app to Windows 98, they are shown visibly as rectangle blocks.

I'm wondering if the difference is due to the uses of unicode and not.

If so, are there any ASCII I can use for my purpose?

Thanks alot!

Re: Use of ASCII seperators for Windows 98 systems

Johan Rosengren10-Jun-04 2:41

Johan Rosengren

10-Jun-04 2:41

There are no characters you can use for non-UNICODE, the ANSI-fonts are supposed to show a "dummy"-character for codes they don't define. So, yes, you are right, this is a question of UNICODE and non-UNICODE Smile | :)

What I would have done would be to create an owner-drawn listbox (which is not at all difficult once you've done it once or twice, if you hesitate). There, I would have split the strings according to some of me defined delimiter.

Re: Use of ASCII seperators for Windows 98 systems

J.B.10-Jun-04 4:59

J.B.

10-Jun-04 4:59

Thanks alot Johan,

I'm trying to think very hard to how Owner Draw on CListCtrl (it's actually CCtrlList I'm using) can help me. But you were right. Since I haven't done this before, I have trouble to figure out a way. I'd really appreciate some hints here Smile | :)

Do you mean that I could somehow display the string and "hide" those delimiters? My understanding to Owner Draw is being able to draw images and customise text. I don't really know how it can help in my case.

Thanks again

Re: Use of ASCII seperators for Windows 98 systems

Johan Rosengren10-Jun-04 6:03

Johan Rosengren

10-Jun-04 6:03

Consider a listbox containing the string

Alpha|beta

In a draw handler, we get the string, and want to use the bar as a delimiter.

// str contains the current line we are drawing

CString left;
CString right;
int found = str.Find( _TCHAR( "|" );
if( found != -1 )
{
  left = str.Left( find );
  right = str.Right( str.GetLength() - ( found + 1 ) );

  // Now we can draw left and right to screen, delimited
  // a line or another character or just some spacing

  dc->TextOut( left, ... // will contain "Alpha"
  dc->TextOut( right, ... // will contain "Beta"

}

You might want to check the articles in http://www.codeproject.com/listctrl/[^], I notice that the very first one discusses owner-drawing.

Re: Use of ASCII seperators for Windows 98 systems

J.B.10-Jun-04 16:48

J.B.

10-Jun-04 16:48

Thanks again, Johan,

As I understand, it is to use the Owner Draw to customise the display of the text on list box. In your example, the text Alpha|beta can get shown as Alpha beta. And so supposedly, when I retrieve the text from the list box using GetText(), it should still return Alpha|beta? The actual content is not changed, just displayed differently on screen? Is it how this works?

Thanks.

Re: Use of ASCII seperators for Windows 98 systems

Johan Rosengren10-Jun-04 19:28

Johan Rosengren

10-Jun-04 19:28

Exactly!

How to use lstrcpy?

Rajesh_K_Sharma10-Jun-04 1:34

Rajesh_K_Sharma

10-Jun-04 1:34

Hi
I would like to know about "lstrcpy" function.Please give me at least on example so that I could understand and use.

rajesh

Re: How to use lstrcpy?

Diddy10-Jun-04 1:37

Diddy

10-Jun-04 1:37

LPCTSTR pszString = "Hello";

TCHAR szCopyTo[100];

::lstrcpy(szCopyTo, pszString);

Result = szCopyTo = "Hello"

Re: How to use lstrcpy?

jmkhael10-Jun-04 1:55

jmkhael

10-Jun-04 1:55

Better to use lstrcpyn to avoid buffer overflows

TCHAR chBuffer[512]= {0} ;
lstrcpyn(chBuffer, "abcdefghijklmnop", sizeof(chBuffer) -1 ) ;

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Resize button on IE toolbar

Hans Ruck10-Jun-04 1:08

Hans Ruck

10-Jun-04 1:08

I'm trying to add two buttons on an IE toolbar and then to resize the first one:

TBBUTTON Button[2];
ZeroMemory((void *)Button, 2*sizeof(TBBUTTON));

Button[1].idCommand = IDM_SECOND;
Button[1].fsState = TBSTATE_ENABLED;
Button[1].fsStyle = BTNS_BUTTON | BTNS_AUTOSIZE | BTNS_SHOWTEXT;
SendMessage(m_hWnd, TB_INSERTBUTTON, 0, (LPARAM)(Button+1));   // success

Button[0].idCommand = IDM_FIRST;
Button[0].fsState = TBSTATE_ENABLED;
Button[0].fsStyle = BTNS_BUTTON | BTNS_AUTOSIZE;

SendMessage(m_hWnd, TB_INSERTBUTTON, 0, (LPARAM)Button);   // success

TBBUTTONINFO tbbut;
tbbut.cbSize=sizeof(TBBUTTONINFO);
tbbut.cx=200;
tbbut.dwMask=TBIF_SIZE;

SendMessage(m_hWnd, TB_SETBUTTONINFO, IDM_FIRST, (LPARAM)&tbbut));   // no effect

but it seems that the last line doesn't have any effect at all. Replacing there IDM_FIRST with IDM_SECOND will, on the other hand, correctly resize the second button Confused | :confused:

Any advice?

rechi

Message of Thanks

Krugger40410-Jun-04 0:29

Krugger404

10-Jun-04 0:29

Hi all;

I would like to express my most heart-felt thanks to all you folks who have helped me in getting acquainted with Visual C++. Now i'm ok. However, this does apply to Mr Prakash who has been very rude and useless to me!

Thanks folks

Krugger

Re: Message of Thanks

Roger Allen10-Jun-04 2:09

Roger Allen

10-Jun-04 2:09

datastruct wrote:
However, this does notapply to Mr Prakash who has been very rude and useless to me!
Were here to help, even Mr Prakash, although sometimes the help you give is not always the help you receive. (Some twisty Aes-Sedai wording there).

Roger Allen - Sonork 100.10016
Strong Sad: I am sad I am flying
_{Who is your favorite Strong?}

Re: Message of Thanks

David Crow10-Jun-04 2:47

David Crow

10-Jun-04 2:47

datastruct wrote:
However, this does apply to Mr Prakash who has been very rude and useless to me!

Of the 21 posts that you have made to date, only four of those have been replied to by Mr.Prakash. Of those four, I've not found any that I would consider rude. Perhaps you have extremely thin skin, or your definition of rude differs from mine. I suspect it's just a language barrier issue.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Message of Thanks

jmkhael10-Jun-04 3:09

jmkhael

10-Jun-04 3:09

My guess he was refering to the post where MrPrakash refused to give him the registration key for the skinmagic library.

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Re: Message of Thanks

David Crow10-Jun-04 3:40

David Crow

10-Jun-04 3:40

Perhaps, but that's far from rude. That's simply saying that "I can't give you something that you have not paid for." A lot of folks are all to quick to share registration keys.

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

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