C / C++ / MFC Discussion Boards

doctorpi22-Jul-03 4:33

22-Jul-03 4:33

Hi guys
There is a limit in the number of controls in a dialog?
There is a way to pass this number?
I was making a copy apste until the paste had less controls than the copy, then I thought that it was a limit
Best regards
Dr.pi

Re: Maximum number of controls in a dialog

Rage22-Jul-03 4:34

Rage

22-Jul-03 4:34

What's the point ?

~RaGE();

Re: Maximum number of controls in a dialog

Iain Clarke, Warrior Programmer22-Jul-03 4:52

Iain Clarke, Warrior Programmer

22-Jul-03 4:52

Practical answer: No, there is no limit.

Real answer: There are limits, but they're BIG ones.

A dialog box is just a window. Controls on the box are just child windows. So the limit is the
upper limit on HWNDs imposed by windows. As I remember, Win95 had a limit of 8 or 16 thousand.
Windows NT (which 2000 and XP are, despite the names) are only limited by memory. So you can have
a few million if you like.

There are earlier practical limitations though...

1) You have to be able to see them. 1 pixel x 1 pixel controls help noone. So you are generally limited
to several hundred by the screen.

2) You have to able to design it. The resource editor may well have limitations. You could use a
text editor instead, but do you have that much patience?

3) You have to be able to identify most of the controls. Window ID numbers are not infinite...
(GetDlgCtrl (UINT id)...)

The mind boggles as to WHY you care about the upper limit. Usability will kill your design
long before windows does.

Iain.

Re: Maximum number of controls in a dialog

doctorpi22-Jul-03 4:55

doctorpi

22-Jul-03 4:55

Hi Iain
Then maybe the limitation is more in the resource editor than in the Visual C++?
Best Regards
Dr.Pi

Re: Maximum number of controls in a dialog

David Crow22-Jul-03 5:00

David Crow

22-Jul-03 5:00

Last I knew, this limit was 255 (or 256). There is no limit when creating the controls dynamically, however. If you've the need for that many, it's better to consider a tabbed-dialog.

Word automation problem...

Jason Henderson22-Jul-03 4:19

Jason Henderson

22-Jul-03 4:19

I am opening a document with a password, and attempting to save it without a password. I keep getting a type mismatch on the vtFileFmt parameter in the SaveAs function. The documentation that I have found says that the format can be one of these:

typedef enum {
    wdFormatDocument = 0,
    wdFormatTemplate = 1,
    wdFormatText = 2,
    wdFormatTextLineBreaks = 3,
    wdFormatDOSText = 4,
    wdFormatDOSTextLineBreaks = 5,
    wdFormatRTF = 6,
    wdFormatUnicodeText = 7,
    wdFormatEncodedText = 7,
    wdFormatHTML = 8
} WdSaveFormat;

so I'm setting the second parameter to 0. So why doesn't this work!?

_variant_t vtFileToOpen(lpszPath);
_variant_t vtTrue(VARIANT_TRUE);
_variant_t vtFalse(VARIANT_FALSE);
_variant_t vtPwd("MYPASS");
<br> <br>
Word::_DocumentPtr doc = app->Documents->Open(&vtFileToOpen, &vtTrue, 
	&vtFalse, &vtTrue, &vtPwd);
<br> <br>
doc->put_Password(_bstr_t(""));
_variant_t vtPwdNew("");
<code>_variant_t vtFileFmt(0);</code>
<br> <br>
if (SUCCEEDED(doc->SaveAs(&vtFileToOpen, <code>&vtFileFmt</code>))) //, &vtFalse, &vtPwdNew)))
{
	doc->put_Saved(VARIANT_TRUE);
	doc->Close();
}

Also, why can't I just use put_Password(_bstr_t("")) then SaveAs with just the file name? It asks for a password the next time I open it. This works when I use SaveAs to set a password elsewhere in the app.

Sometimes I'd like to strangle whoever made OLE. Oh, and don't forget the guy who makes the documentation for this stuff. He's gonna get it too.

Jason Henderson

I bleed orange.

Re: Word automation problem...

David Crow22-Jul-03 5:06

David Crow

22-Jul-03 5:06

My Word Automation looks a tad different than yours:

CString         strFileName;
_Application    app;
Documents       docs;
_Document       doc;
COleVariant     vtOptional((long) DISP_E_PARAMNOTFOUND, VT_ERROR),
                vtFalse((short) FALSE),
                vtTrue((short) TRUE),
                vtDoc((short) 0),
                vtText((short) 2),
                vtRtf((short) 6),
                vtHtml((short) 8);


if (app.CreateDispatch("Word.Application") == TRUE)
{
    strFileName = "SomeFile.doc";

    docs = app.GetDocuments();

    doc = docs.Open(COleVariant(strFileName), vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional, vtOptional);

    strFileName.Replace(".doc", ".doc1");

    doc.SaveAs(COleVariant(strFileName),
        vtDoc,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional,
        vtOptional);

    docs.Close(vtFalse, vtOptional, vtOptional);

    app.Quit(vtOptional, vtOptional, vtOptional);
}

Re: Word automation problem...

Jason Henderson22-Jul-03 5:21

Jason Henderson

22-Jul-03 5:21

I'm opening a word document in a SDI container. It looks better than the embedded word examples I've found, but the only way to open the document into the container is by using OleCreate or OleCreateFromFile (that I have found anyway). Using these functions to open a document with a password really screws things up. Another copy of word opens up.

I'll try your vtOptional method.

Thanks

Jason Henderson

I bleed orange.

CDialog question

User-37793622-Jul-03 3:50

User-377936

22-Jul-03 3:50

hi there

sorry for this newbie question Wink | ;)

is it possible to create a cdialog derieved class without using the resource editor?

Re: CDialog question

melwyn22-Jul-03 4:05

melwyn

22-Jul-03 4:05

I don't see why not.
Just create a new .h file as follows

class CMyDlg : public CDialog
{
};

and put the functionality in the corresponding .cpp file.

Maybe I did not get your question.
-Melwyn

Re: CDialog question

User-37793622-Jul-03 7:06

User-377936

22-Jul-03 7:06

this was my first try Wink | ;)

after this i tried to

CMyDlg dlg;
dlg.DoModal() ... failed

dlg.Create(...) (derieved from cwnd...) but failed...

i also tried to overwrite methods like domodal ... initdialog, ....

and last but not least....the template thing Wink | ;)

but nothing of them worked... Frown | :(

Re: CDialog question

Iain Clarke, Warrior Programmer22-Jul-03 5:07

Iain Clarke, Warrior Programmer

22-Jul-03 5:07

flaffy wrote:
sorry for this newbie question

Its OK. We all had to start somewhere. At least you aren't asking how to write a network packet sniffer
two days after opening your "learn C++" book...

In answer to your question, YES.

Unless you are a masochist, you will use the Resource Editor to create the actual resource for the
dialog (dialog size, title, child controls and their IDs). You can make this up by opening your
RC file as text and typing, but that is only for obscure needs.

Once you have a dialog resource, just make a .H file for the definition, and a .cpp file for
the implementation. You can take CAboutDlg in your project as a simple example. Include them
in your project, and away you go.

Once you've got used to not using ClassWizard, you won't go back. Its WAY too limited for anything
except trivial dialogs.

Iain.

Re: CDialog question

User-37793622-Jul-03 7:12

User-377936

22-Jul-03 7:12

i also tried this Smile | :)

a "dummy" dialog Smile | :)

but after i edit the dialog my way ... visual studio dont want to be my friend anymore Frown | :(

... the question about the packet sniffer will be created in the off topic Wink | ;)

Find a file by last modified

Krisna Adityawan22-Jul-03 2:38

Krisna Adityawan

22-Jul-03 2:38

How to find a file in a folder whatever the type is by last modified type.
ex: i want to find *.txt with last modified today

AND
How to delete all file in a folder without delete the folder it self ?

Confused | :confused:

Thank for helping
Smile | :)

Re: Find a file by last modified

David Crow22-Jul-03 2:56

David Crow

22-Jul-03 2:56

Krisna Adityawan wrote:
How to find a file in a folder whatever the type is by last modified type.
ex: i want to find *.txt with last modified today

Are you wanting the newest .TXT file in a given folder? How about this pseudocode:

set lastmod to 0
for each .txt file in folder
   if file's last mod date > lastmod
      set lastmod = file's last mod date
      save name of file
   end
next

Krisna Adityawan wrote:
How to delete all file in a folder without delete the folder it self ?

SHFileOperation() should do it.

Programmaticaly delete a file.

vcseeker22-Jul-03 1:58

vcseeker

22-Jul-03 1:58

Hi all,
I am writing a program that requires deleting a file stored in the disk programmatically .I am wondering if we can do that?
Could somebody help me on this.
Regards.

Re: Programmaticaly delete a file.

Jens Doose22-Jul-03 2:12

Jens Doose

22-Jul-03 2:12

Try DeleteFile

Jens

Re: Programmaticaly delete a file.

vcseeker22-Jul-03 2:37

vcseeker

22-Jul-03 2:37

Thanks a lot Jens,
I solved my problem.

Re: Programmaticaly delete a file.

David Crow22-Jul-03 3:01

David Crow

22-Jul-03 3:01

You also have SHFileOperation() at your disposal.

Re: Programmaticaly delete a file.

vcseeker22-Jul-03 4:06

vcseeker

22-Jul-03 4:06

Hi davi ,
Thanks a lot for guidance.
Regards. Smile | :)

Re: Programmaticaly delete a file.

melwyn22-Jul-03 5:02

melwyn

22-Jul-03 5:02

You could also try CFile::Remove()

Re: Programmaticaly delete a file.

basementman22-Jul-03 7:31

basementman

22-Jul-03 7:31

Or, the CRT function remove().

onwards and upwards...

Parsing .asp page

Anonymous22-Jul-03 1:41

Anonymous

22-Jul-03 1:41

Hi,
I need to parse ASP pages before they are rendered by a webserver and find the positions for the ASP scripts within the page. Looking for the "<%" and "%>" -tags is not a good solution since it could be something else than ASP(ei. could be in comments, could be HTML text etc.)

Anyone know a good way how to find out what really is ASP in a page?

Thanks
Fred

User rights

Hashim Saleem22-Jul-03 1:24

Hashim Saleem

22-Jul-03 1:24

how do I know what privilage level the current user is on? like is he a member of administrative group or user group or some thing else?

Re: User rights

Mazdak22-Jul-03 1:32

Mazdak

22-Jul-03 1:32

NetLocalGroupGetMembers() & NetLocalGroupEnum() maybe what you wants.

Mazy

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