C / C++ / MFC Discussion Boards

Re: Unique key generation on a network

Martin Koorts17-Jan-05 2:56

Martin Koorts

17-Jan-05 2:56

No, Sorry

modify the height of header of a list control

Member 166038517-Jan-05 0:35

Member 1660385

17-Jan-05 0:35

Hello,
i want to increase the height of the header of a listcontrol without affecting other rows.
please help me.........
thanks

Re: modify the height of header of a list control

Martin Koorts17-Jan-05 1:55

Martin Koorts

17-Jan-05 1:55

Hi
I've had a look at this, and can see no way - the CHeaderCtrl retrieved from the CListCtrl has facility for only adjusting the width of a column.

You'll have to look at owner-draw.

Martin

how to convert BYTE to String

doneirik17-Jan-05 0:18

doneirik

17-Jan-05 0:18

Hi I´m doing some basic serial communication vith Visual C++ .NET.

Reading from the serial port with the ReadFile command:

BYTE Byte;<br />
ReadFile (hPort, &Byte, 1, &dwBytesTransferred, 0);

I have some problems displaying what I read....With the "cout" command this worked fine:
cout<<Byte;
However, with a Windows Forms Appl. I need to output the readout with
this->Textbox1->Text = Byte;

With this I get an error message, saying "cannot convert from BYTE to String"

How can I convert this BYTE variable in order to make it compatible?`

regards,
doneirik

Re: how to convert BYTE to String

Mahendra_78617-Jan-05 0:38

Mahendra_786

17-Jan-05 0:38

Try this:

char buff[3] = "";
sprintf(buff, "%X", Byte); // Display in hex (or choose whatever format you prefer)
this->Textbox1->Text = buff;

Hope it works!

Regards
Mahendra

Re: how to convert BYTE to String

doneirik17-Jan-05 2:24

doneirik

17-Jan-05 2:24

Thanks, it worked.

Save part of Bitmap in File / Crop

guf-cryptkeeper17-Jan-05 0:15

guf-cryptkeeper

17-Jan-05 0:15

Hi.
First problem solved and soon I encountered the second.
So at this point my SDI program is able to open a BMP and show it on the screen. In an modal dialogue it is possible to give some borders to only show a part of the actual BMP File...
What I want to do is to save this part in a new file...
One of my books suggest just to change the two used device contexts MemDC and pDC to print from the screen in the memory...
I tried to do it this way but because of my c++ abusing I don't get it to work properly.

This is the line which prints the bmp on the screen. Width, Height, TLCx and TLCy are the variables i can manipulate to show only the important part of the picture...

pDC->BitBlt(0,0,g_Width,g_Height,pMemDC,g_TLCx,g_TLCy,SRCCOPY);

The code i plan to use is something like... make a new bitmap object and fill it with the shown bmp... to do this i use

MemDC.BitBlt(...)

Is this a possible approach for the problem or am I totally wrong ?

Best regards,
Helge.

Re: Save part of Bitmap in File / Crop

guf-cryptkeeper17-Jan-05 23:04

guf-cryptkeeper

17-Jan-05 23:04

Noone ever tried something similar? I am really not sure whow to solve this problem...
Would really appreciate any help...
Helge.

client-server

Alka7516-Jan-05 22:29

Alka75

16-Jan-05 22:29

i am trying to design a client-server application
the code for sending & receiving is as follows
void CSocketDlg::OnBsend()
{
int iLen,iSent;
UpdateData(TRUE);
if (m_strMessage=="")
AfxMessageBox("Please type the name of the file");
else if (m_strMessage!=" ")
{
iLen=m_strMessage.GetLength ();
iSent=m_sConnectSocket.Send (LPCTSTR(m_strMessage),iLen);
if(iSent==SOCKET_ERROR)
{
}
else
{
CFile file(m_strMessage,CFile::modeRead|CFile::typeBinary);
char s[1025];
int totalBytesRead,bytesRead,len,flag=0;
//strcpy(s,"c:\\program files\\microsoft visual studio\\my projects\\Alka.txt");
//len=strlen(s);
totalBytesRead=0;
int length=file.GetLength();
//iSent=m_sConnectSocket.Send (LPCTSTR(s),len);
flag=1;
while(totalBytesRead<=length && iSent != SOCKET_ERROR && flag==1)
{
bytesRead=file.Read(s,1024);
s[bytesRead]='\0';
totalBytesRead+=bytesRead;
//m_ctlSent.AddString (s);
iSent=m_sConnectSocket.Send (LPCTSTR(s),bytesRead);
UpdateData(FALSE);
}
}
}

}

but iam unable to design for multiple requests. application is a MFC Dialog based application

Alka Kashyap

How to use TRACE() in Win32 Applications

LiYS16-Jan-05 22:29

LiYS

16-Jan-05 22:29

Hi all:

How can I get debug information through TRACE() or other similar macro in Win32 applications?
I added TRACE() in the source code and also include the "AFX.h".In the project setting I choose the "use MFC in a static library"? But it cannot pass the compilation!

Re: How to use TRACE() in Win32 Applications

Roger Allen16-Jan-05 23:20

Roger Allen

16-Jan-05 23:20

The nearest equivalent would be to use AllocConsole() and write any debug strings to its handle. I have used this method in the past

If you vote me down, my score will only get lower

Re: How to use TRACE() in Win32 Applications

Martin Koorts17-Jan-05 1:06

Martin Koorts

17-Jan-05 1:06

Hi
Including <crtdbg.h> gives you;
_RPT0, _RPT1 .. _RPT4, _ASSERT, et al

These are the primitives of TRACE and ASSERT.

I always use it like so, for example;

_RPT1(_CRT_WARN, "## blah = '%ls'\n", sz);

HTH
Martin

Re: How to use TRACE() in Win32 Applications

David Crow17-Jan-05 3:55

David Crow

17-Jan-05 3:55

Have you considered OutputDebugString()?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Convert Count in Milliseconds to Date and Time format(dd:mm:yy hours:min:sec:milliseconds)

sam_software16-Jan-05 22:11

sam_software

16-Jan-05 22:11

Iam getting count(data type is DWORD) in milliseconds .I have to convert into Date and Time format (dd:mm:yy hours:min:sec:milliseconds) and display it in a List view.Iam unable to get a function which serves my purpose in vc++.

Re: Convert Count in Milliseconds to Date and Time format(dd:mm:yy hours:min:sec:milliseconds)

Martin Koorts16-Jan-05 23:22

Martin Koorts

16-Jan-05 23:22

Hi
Have a look at the COleDateTime class

Martin

Re: Convert Count in Milliseconds to Date and Time format(dd:mm:yy hours:min:sec:milliseconds)

David Crow17-Jan-05 4:02

David Crow

17-Jan-05 4:02

Unless this count is the number of milliseconds that have elapsed since a certain period of time, what you are after does not exist. Otherwise, have a look at FileTimeToLocalFileTime(), FileTimeToSystemTime(), LocalFileTimeToFileTime(), et al.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

question about NetUserGetInfo

busisbus16-Jan-05 19:13

busisbus

16-Jan-05 19:13

Hi all,

I got a problem when I use NetUserGetInfo(...), can anyone help me?

There's a Domain and a WorkGroup in LAN, a client in Domain wants to get user info from a server in WorkGroup by NetUserGetInfo(). The client loged in with Domain user ID:"MyName".

When I call NetUserGetInfo, the following cases appear:

Server also has a Local user id: "MyName", but its psw diff from Domain user "MyName":
NetUserGetInfo fail!

Server also has a Local user id: "MyName", and its psw is same with Domain user "MyName":
NetUserGetInfo success!

Server does not have Local user named "MyName":
NetUserGetInfo success!

I'm wondering that how does these take place. Will a domain user ID and a same ID in a workgroup cause any trouble?

thanks a lot.

Splitter Window

Mahendra_78616-Jan-05 18:56

Mahendra_786

16-Jan-05 18:56

I am creating a 2x2 spllitter window in a SDI application.

// OnCreateClient of SDI Frame Window
...
VERIFY(m_wndSplitter.CreateStatic(this, m_rows, m_cols));
...

I want every pane to be of the same size (plus-minus 1 pixel). In
OnSize I do something like:

// OnSize of Frame Window
...
m_wndSplitter.GetClientRect(rect);
int row_height = rect.Height();
int col_width = rect.Width();
row_height /= 2;
col_width /= 2;
m_wndSplitter.SetRowInfo(0, row_height, 100);
m_wndSplitter.SetRowInfo(1, row_height, 100);
m_wndSplitter.SetColumnInfo(0, col_width, 100);
m_wndSplitter.SetColumnInfo(1, col_width, 100);
m_wndSplitter.RecalcLayout();
...

HOWEVER probably due to the "splitting margin" or border
between panes, the pane(0, 0) is larger than the other panes
with a difference of about 11 pixels in size. Other than
"manually" accounting for the border thickness, is there
a better way of making the panes same size.

Thanks in anticipation.

Re: Splitter Window

Iain Clarke, Warrior Programmer17-Jan-05 0:39

Iain Clarke, Warrior Programmer

17-Jan-05 0:39

There is no way for a frame to get its splitters internal dimensions.

But you could write a new class inheriting from CSplitterWnd, and
use that instead...

Be warned, this not debugged (or even compiled code), so check it out
yourself. If omitted *loads* of error checks.

class CSymetricalSplitter : public CSplitterWnd
{
public:
    BOOL ArrangeSymmetrically (int nMinX, int nMinY)
    {
        CRect rcClient;
        GetClientRect (&rcClient);
        int nCols, nRows, nSize, n;
        nCols = GetColumnCount ();
        nRows = GetRowCount ();
        if (!nRows || !nCount)
            return FALSE;

        // Rows
        nSize = rcClient.Height ();
        nSize -= (nRows - 1) * m_cySplitterGap; // <-- A protected variable
        nSize /= nRows;
        for (n = 0; n < nRows; n++)
            SetRowInfo (n, nSize, nMinY); 


        // Columns
        ....

        RecalcLayout ();
    }
};

Hopefully that should help!

Iain.

Re: Splitter Window

Mahendra_78617-Jan-05 14:19

Mahendra_786

17-Jan-05 14:19

Thanks. This is probably the only way out. Here is a fragment from
Q & A: C++ (Periodicals 1998) from MSDN Library 1999 that does something
similar:

After calculating the heights of the toolbars, the next troublesome task is calculating the height and width of all the splitter window components: the border with which it surrounds each pane and the splitter bar itself. All these magic numbers are contained within data members in CSplitterWnd, but naturally the data is protected, which means you can’t access it! Sigh. So what do you do? Simple: just derive a new class with public functions to export the protected data, and use it instead of CSplitterWnd in your main frame.

class CMySplitterWnd : public CSplitterWnd {

public:

CSize GetBorderSize()

{ return CSize(m_cxBorder,m_cyBorder); }

CSize GetSplitterSize()

{ return CSize(m_cxSplitter,m_cySplitter); }

};

Re: Splitter Window

Mahendra_78617-Jan-05 14:42

Mahendra_786

17-Jan-05 14:42

(To be complete) this is what can be done:

CRect rect;
m_wndSplitter.GetClientRect(rect);
CSize splitter_size = m_wndSplitter.GetSplitterSize();
CSize border_size = m_wndSplitter.GetBorderSize();

int row_height = rect.Height() - ((splitter_size.cy * (m_rows - 1)) + (border_size.cy * 2));
int col_width = rect.Width() - ((splitter_size.cx * (m_cols - 1)) + (border_size.cx * 2));
row_height /= m_rows;
col_width /= m_cols;

for (int i = 0; i < m_rows; i++) {
m_wndSplitter.SetRowInfo(i, row_height, 100);
}
for (int j = 0; j < m_cols; j++) {
m_wndSplitter.SetColumnInfo(j, col_width, 100);
}
m_wndSplitter.RecalcLayout();

Regards
Mahendra

how to delete class from workspace

Ritu Kwatra16-Jan-05 18:41

Ritu Kwatra

16-Jan-05 18:41

I have added a new ATL class in the project but now I want to remove this class from the project. How can I remove the class because If I remove the class manually then i need to remove other settings of the class also as it is an ATL class so it must be having enteries in the coclasses of the project.

Thanks in advance for ur help

Rits

Re: how to delete class from workspace

geo_m16-Jan-05 20:16

geo_m

16-Jan-05 20:16

Hm, not so easy work.
1st - remove the class .h and .cpp files (and delete/rename on HDD)
Then you'll have probably corresponding .rgs file in the project tree.
Then you need to remove corresponding parts in the projects .idl file - these should be probably the interface declaration IYourClass somewhere on the beginning of the .idl file. Then remove the coclass definition from .idl (should be somewhere at the end of the file).
Then last thing should be the OBJECT_ENTRY macro in the yourProject.cpp file.

Then rebuild the project and compiler will remind you about missed includes or macros.

Re: how to delete class from workspace

Ritu Kwatra16-Jan-05 22:37

Ritu Kwatra

16-Jan-05 22:37

Yes, u r right
I had to remove entries from the idl file also.

Thanks Smile | :)

Rits

Re: how to delete class from workspace

eli1502197916-Jan-05 22:22

eli15021979

16-Jan-05 22:22

Hi,
I'm not sure but i think that removing "class.h" and "class.cpp" files from the project will do the job.

Regards,
Eli

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