Re: Table - C / C++ / MFC Discussion Boards

6-Feb-02 3:14

I'm new to database programming in Visual C++
and have a few questions. Is the only way to get
data from the database to use CRecordset?
How can I get data by executing SQL directly?

Re: SQL

Mazdak6-Feb-02 3:13

Mazdak

6-Feb-02 3:13

Here is very good ebook for begginer in database:

http://lnrpc2.irb.hr/ebooks/0672313502/index.htm

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

string tables

Mel Stober6-Feb-02 3:12

Mel Stober

6-Feb-02 3:12

I know what a string table is and how to use it. My question is -- is it worth it? Do those strings remain on disk and LoadString() reads them from there, or are they really loaded into ram memory during program startup?

Re: string tables

Joaquín M López Muñoz6-Feb-02 3:26

Joaquín M López Muñoz

6-Feb-02 3:26

Strings table are embedded inside the executable image (the .EXE file), that gets loaded to virtual memory at program startup. It is the processor's responsibility to bring virtual memory pages to RAM or store them in the disk cache (the swapping file) depending on whether the pages are being referred to or not (and some other optimization policies); so the question of whether the string table is loaded into memory or not is a fuzzy subject --probably it won't get loaded if you don't use resource at all.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: string tables

Carlos Antollini6-Feb-02 3:32

Carlos Antollini

6-Feb-02 3:32

Joaquín:
very educative!!!
I am surprised!!!
CLAP, CLAP, CLAP!!! Wink | ;)

Regards....

The programmer's national anthem is 'AAAAAAAARRRRGHHHHH!!'.

Carlos Antollini.
Sonork ID 100.10529 cantollini

Re: string tables

Joaquín M López Muñoz6-Feb-02 3:36

Joaquín M López Muñoz

6-Feb-02 3:36

You'll make me blush Blush | :O

Actually, there are inaccuracies in my explanation --read only sections of the executable probably won't ever do it to the swapping file (they're retrieved directly from the .EXE file itself and simply dismissed when not needed), and stuff like that.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Table

6-Feb-02 3:07

I want to represent some data from a database to the user.
Is it most convenient to use a table. What kind of
table should I use. There is no table available in the
standard controls. Is MSFlexGrid from the ActiveX controls
a good choice?

Re: Table

Mazdak6-Feb-02 3:11

Mazdak

6-Feb-02 3:11

MSFlexGrid is for DAO,and it is old technology,It is better to use ADO.
For this you can use MS Datagrid(I think it is in visual studio6 not v7) or you can find very nice datagrids in codeproject

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: Table

Carlos Antollini6-Feb-02 3:29

Carlos Antollini

6-Feb-02 3:29

You can find several samples of datagrid in CP.
Look here

Regards...

A printer consists of three main parts: the case, the jammed paper tray and the blinking red light.

Carlos Antollini.
Sonork ID 100.10529 cantollini

Using FindWindow()

Chris Meech6-Feb-02 2:45

Chris Meech

6-Feb-02 2:45

I am using a FindWindow call and supplying the window class name and sure enough when an app is running with that class, I get a handle to the window returned to me. But suppose there are several instances of the app running and so I use the handle to GetWindowText to search for a specific instance. What API call is available to 'walk through' all windows with a given class name? Does such an animal exist or do I need to put something together myself? Suggestions welcomed.

Thanks.

Chris Meech

Re: Using FindWindow()

Mazdak6-Feb-02 3:31

Mazdak

6-Feb-02 3:31

I don't if it can help you:"GetWindowThreadProcessId"
Also check "Window Functions" in MSDN

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: Using FindWindow()

Nish Nishant6-Feb-02 4:47

Nish Nishant

6-Feb-02 4:47

Look up EnumWindows

Nish

Sonork ID 100.9786 voidmain
www.busterboy.org
If you don't find me on CP, I'll be at Bob's HungOut

Re: Using FindWindow()

Chris Meech6-Feb-02 5:10

Chris Meech

6-Feb-02 5:10

Thanks Nish and Mazdak for your suggestions.

I ended up doing the following and it has tested out fine.

HWND    hWnd        =   ::GetDesktopWindow();
HWND    hSessionA   =   NULL;

do
{
    if ( hSessionA == NULL )
        hSessionA   =   ::GetWindow(hWnd, GW_CHILD);

    if ( IsWindowVisible(hSessionA) )
    {
        CString         strWindowText;
        char*           pWindowText     =   strWindowText.GetBufferSetLength(sizeof(szSessionA));

        GetWindowText(hSessionA, pWindowText, sizeof(szSessionA));
        strWindowText.ReleaseBuffer();
        strWindowText.MakeUpper();
        if ( strWindowText.Compare(szSessionA) == 0 )
            break;
    }
    hSessionA = GetWindow(hSessionA, GW_HWNDNEXT);
}
while ( (hSessionA) || AfxMessageBox("Please start your SESSIONA and then click OK to search for this session again or you may click Cancel in order to quit.", MB_ICONQUESTION|MB_OKCANCEL) == IDOK );

When I drop out of the while loop, hSessionA is either NULL or contains a value that is the HWND for the window I'm looking for.

Thanks again.

Chris Meech

directly changing the exponent of a type double

Filip Govaerts6-Feb-02 2:36

Filip Govaerts

6-Feb-02 2:36

Hi,

Can anyone tell me how to change the exponent from the type double? Basicly what I want to do is to extract the exponent form:

<--------------------all the bytes(8 total)------------------->
(SXXX XXXX) (XXXX MMMM) (MMMM MMMM) (MMMM MMMM) ... (MMMM MMMM)
(where x represents the exponent)

do some calculations and place it back in. I want to this with a large amount of numbers so I seek a pretty fast way to do it. Anyone got an idea? thx already.

greetings,
Filip Govaerts
Belgium

Re: directly changing the exponent of a type double

Joaquín M López Muñoz6-Feb-02 3:21

Joaquín M López Muñoz

6-Feb-02 3:21

double d;
unsigned char * d_layout=reinterpret_cast<unsigned char *>(&d);
//extraction
int exp=int(d_layout[6]>>4)+(int(d_layout[7]&0x7FU)<<4);
//insertion
d_layout[6]&=0x0FU;
d_layout[6]|=(exp&0x0F)<<4;
d_layout[7]&=0x80U;
d_layout[7]|=(exp&0x7F0)>>4;

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: directly changing the exponent of a type double

Filip Govaerts6-Feb-02 3:25

Filip Govaerts

6-Feb-02 3:25

respect...
thx a lot

Filip Govaerts

loading icon

6-Feb-02 2:01

in using MDI, can i load an icon to my main frame or childframe upon an action? for example when i click a button, the mainframe's icon will change

Re: loading icon

Mazdak6-Feb-02 2:12

Mazdak

6-Feb-02 2:12

See your initinstance ofyour application:(this line from it)

if (!pMainFrame->LoadFrame(IDR_MAINFRAME))
return FALSE;

You do the same as this function

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: loading icon

6-Feb-02 2:57

i have tried using that. but it cant work. is there any other commands i can try?

Re: loading icon

Mazdak6-Feb-02 3:04

Mazdak

6-Feb-02 3:04

what's your code that it does't work?

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: loading icon

6-Feb-02 4:28

i tried with a new MDI project. with the original icon IDR_MAINFRAME. when i edit/color the icon, and compile it, the mainframe does not contain the icon i have. it still have the old original MFC icon. how do i go about changing it?

Re: loading icon

Mazdak6-Feb-02 20:42

Mazdak

6-Feb-02 20:42

Sorry,I made mistake Frown | :(

There is an example in MSDN that you can find your answer,MDIDOCVW,check it ,you'll find the answer Big Grin | :-D

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Search for a file...

Rickard Andersson²⁰6-Feb-02 1:54

Rickard Andersson²⁰

6-Feb-02 1:54

Why doesn't this code work, and can you complete it?

CFileFind finder;
BOOL bWorking = finder.FindFile("fcc32.exe");
while (bWorking)
{
bWorking = finder.FindNextFile();
CString str = finder.GetFilePath();
MessageBox(str, "", MB_OK);
}

It's simple, I want to searc over the C drive to look fpo the file fcc32.exe and then show a message box with the path to the file...

------------------------------------
Rickard Andersson, Suza Computing
ICQ#: 50302279
I'm from the winter country SWEDEN!

------------------------------------

Re: Search for a file...

Mazdak6-Feb-02 2:34

Mazdak

6-Feb-02 2:34

The problem is that when the file is on the root of your drive the bWorking
will be true so you don't messagebox.

Mazy

Don't Marry a Person You Can Live With...
Marry Someone You Can Not Live Without

Re: Search for a file...

Derek Waters6-Feb-02 11:31

Derek Waters

6-Feb-02 11:31

CFileFind is not recursive, so it won't search subdirectories. You need to do something like this:

CString FindMyFile(LPCTSTR apszFromDir)
{
  CFileFind finder;
  CString search;
  search.Format(_T("%s\\*"), apszFromDir);
  BOOL bWorking = finder.FindFile(search);
  while (bWorking)
  {
    bWorking = finder.FindNextFile();
    if (!finder.IsDots())
    {
      if (finder.IsDirectory())
      {
        return FindMyFile(finder.GetFilePath());
      }
      else
      {
        if (finder.GetFileName().CompareNoCase(_T("fcc32.exe")) == 0)
        {
          return GetFilePath();
        }
      }
    }
  }
  return _T("");  // It wasn't found.
}

------------------------
Derek Waters
derek@lj-oz.com

Last Visit: 31-Dec-99 18:00 Last Update: 1-Jul-24 10:35

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