C / C++ / MFC Discussion Boards

Re: CBrush::CreatePatternBrush limitations?

Mike Dimmick13-Nov-03 3:17

Mike Dimmick

13-Nov-03 3:17

It's often educational to read the MFC source code Wink | ;)

CBrush::CreatePatternBrush is a simple wrapper around the API function, and hence has the same limitations. The MFC documentation simply doesn't indicate that newer versions of Windows don't have this limitation.

Re: CBrush::CreatePatternBrush limitations?

CodeBrain13-Nov-03 3:31

CodeBrain

13-Nov-03 3:31

Thanks for the answer. Fortunately this confirms my knowledge about MFC Big Grin | :-D

I also got this answer using trial-and-error.

How can I Enable Drag&Drop of IE URL's in my prog

PlasmaJam12-Nov-03 21:51

PlasmaJam

12-Nov-03 21:51

I would like a program I am working on to be abel to accept dropped URL's from f.i. IExplorer. But DragAcceptFiles only seems to enable the dropping of local files. When I try to drag an URL to my app window it I get a 'no drop' mouse pointer.
I know it can be done, VC can do it and several other apps I use as well.
I hope someone can help! Thanks.

New Fonts for VC++ 6

dushkin12-Nov-03 21:29

dushkin

12-Nov-03 21:29

Hi there,
Does anyone know how to add new fonts to the very limited number of fonts in VC++ 6 ? Any add-in or a procedure?
Best Regards, Dushkin. D'Oh! | :doh:

Getting MIME Format

derzellner12-Nov-03 20:38

derzellner

12-Nov-03 20:38

Hello,
is there any way to get an email in the mime format by using
outlook automation and C++(wrapper classes ...)?

Thanks for helping !

crystalreport date field.

murali_utr12-Nov-03 20:31

murali_utr

12-Nov-03 20:31

hi,
for replaceselectionformula i compare date field. following statement
m_report.ReplaceSelectionFormula("{customer_master.lastrent}>'2003-11-13'")
i got error of incorrect formula. what's the error any one help to me.

Thanks in advance.

Murali.M

Re: crystalreport date field.

Steve S12-Nov-03 22:49

Steve S

12-Nov-03 22:49

It might not be converting '2003-11-13' correctly into a date by assuming YYYY-MM-DD. I think there's a function in CR you can use to convert from a string to a date, or alternatively, you could use a parameter which has the date type.

Steve S

Stop large loop in run time?

closecall12-Nov-03 18:56

closecall

12-Nov-03 18:56

how do i stop a time consuming for loop in run time?

(apart from using callbacks/multithreading)

is there a brutal way to stop a loop like:

for (int i=0; i<=10000000000000; i++) {
j += i;
}

ideas ??? Confused | :confused:

Re: Stop large loop in run time?

Dominik Reichl12-Nov-03 23:00

Dominik Reichl

12-Nov-03 23:00

Something like this?:
http://www.cpp-home.com/contests/tests.php[^]

Dominik

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

Re: Stop large loop in run time?

Alexander ^M.,13-Nov-03 8:13

Alexander ^M.,

13-Nov-03 8:13

make it like this:

for (int i=0; i<=10000000000000; i++) {
 j += i;
 if( bStop )
  break;
}
...
void Stop()
{ 
 bStop = TRUE;
}

AND: i is an integer number, so 10000000000000 IS INVALID for int!!! (too big)

Don't try it, just do it! Wink | ;-)

Using matlab symbolic equation in Visual Studio 6.0

Member 69647712-Nov-03 17:46

Member 696477

12-Nov-03 17:46

I embeded the matlab program(symbolic equation) into visual studio 6.0
with MATLAB Add-in. Unfortunately, they can't compile the matlab code.
following is the error message
The MATLAB Compiler does not currently support MATLAB object-oriented programming. References to the method "sym" will produce a run-time error.
Please help me.

dong wook lee

ToolTip not show in my DLL ???

ccnuxjg12-Nov-03 17:12

ccnuxjg

12-Nov-03 17:12

My ower draw button doesn't show the tooltip in dll, but
it works fine in exe files.
What is it happened? My DLL is regular with staticly
linked. And my dialog is pop up as modeless dialog.

In modeless dialog , PretranslateMessage is not getting called.

I'm Bird~

Site Suggestion

LOSTTWARE.com12-Nov-03 16:10

LOSTTWARE.com

12-Nov-03 16:10

I don't know who the webmaster here is, but great site. On mine, I added a script into the message board (a hack) that numbered lines of code. I think it could be useful here as well.

Josh

Re: Site Suggestion

Mike Dimmick13-Nov-03 3:41

Mike Dimmick

13-Nov-03 3:41

Try the Suggestions Forum[^].

MFC VC++ 6.0

LOSTTWARE.com12-Nov-03 16:08

LOSTTWARE.com

12-Nov-03 16:08

I used MFC wizzard to create a mdi application. I have the common app.cpp view.cpp doc.cpp mainfraim.cpp and child.cpp along with a hundred add ons. I couldn't find a good File new template chooser so I am making one from scratch. I am at the point where the user presses OK, on the type he wants. I simply want to open from a read only file, like a template I create. Kinda like if I were to click File Open. I wasn't sure how to do this, so I looked at how the application was set up to open a file. All it has is:

BOOL CFDPDoc::OnOpenDocument(LPCTSTR lpszPathName) <br />
{	if (!CDocument::OnOpenDocument(lpszPathName))<br />
		return FALSE;<br />
	// TODO: <br />
	return TRUE;<br />
}

Well, that is the only real code that it has on File open, I just want to make a similar instance to open only that template I will make. How do I do that? thanks guys

LOSTTWARE.com

NEED HELP BAD

LOSTTWARE.com12-Nov-03 20:33

LOSTTWARE.com

12-Nov-03 20:33

Well, I really need someones help on this. Basically all I want to do is make a function that instead of opens a file that the user chooses, I can right the file it opens into that function. How do I write a function that does that with my MDI application?

Josh

Re: NEED HELP BAD

Antti Keskinen13-Nov-03 0:59

Antti Keskinen

13-Nov-03 0:59

So you need a function that instead of opening the file a user chooses, it opens the file stream into a function ?

Easy, just override the necessary message (ID_FILE_NEW or a custom message), create a CFile object, use it to open the designated file (OPENFILENAME struct) and off you go. You can now use the object to read/write data from the attached file.

Is this what you want ? If not, you'd need to write a bit more clearer on what you need accomplishing. Remember to check your posts before posting them. Make sure they have no grammar or word bugs in them, so they are easy to understand. Misunderstanding issues are a huge problem in this field Smile | :)

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: NEED HELP BAD

Roger Allen13-Nov-03 1:07

Roger Allen

13-Nov-03 1:07

If I understand correctly you have many CDocTemplate objects registered in your application, and you want to open a specific document type?

You can do that by getting a pointer to the correct CDocTemplate object and calling OpenDocumentFile() on it. Pass NULL to open an empty document, or pass a filename if you need to open an existing file.

If you need to do this from an existing open document and need to open the same type of document, you can call GetDocTemplate(0 to get the CDocTemplate pointer you need. If not, then you need to acquire a pointer to it through the CWinApp:m_pDocManager pointer. You can iterate the list of CDocTemplate objects using GetFirstDocTemplatePosition() and GetNextDocTemplate(). When you find the right one (if you know which one it is) you can proceed from there.

This article of mine may also be of help:

Doc/View stuff[^]

Roger Allen - Sonork 100.10016
If your dead and reading this, then you have no life!

Problem with RTL Mirroring CFileDialog-derived dialogs in Windows 98

Eriol4112-Nov-03 15:53

Eriol41

12-Nov-03 15:53

Hi,

I am working on a project that needs Arabic and Hebrew support and my dialogs have to be mirrored in a right-to-left layout. I have already implemented this using WS_EX_LAYOUTRTL in the rc files and it works fine in WinXP, Win2k, and WinME. I tried this in Win98 however it doesn't work. But if a CFileDialog class is used directly, the mirroring displays correctly.

Is there a limitation for Windows 98 with regards to mirroring CFileDialog derived dialogs, or do I need to code a lot more besides WS_EX_LAYOUTRTL?

Thanks,
Eriol41

Help with MS Data Grid and Data Control

Member 65260612-Nov-03 15:19

Member 652606

12-Nov-03 15:19

Hi,
I am using the CDataGrid to display some information from a
database. I am having the following problems.

1. I am supposed to trap errors and print them in to a log file. I have mapped the Error message of the data control. The function looks like this:
OnErrorAdodc1(long ErrorNumber, BSTR FAR* Description, long Scode, LPCTSTR Source, LPCTSTR HelpFile, long HelpContext, BOOL FAR* fCancelDisplay)

I have not been able to get the Description text from BSTR FAR* ptr. Can someone help me there.

2. Is it possible to find the sum of an entire column and print it below the column. I know how to find the summation. But don't know if I can set in a column of the data grid some information that does not belong in the database.

My problem is I cannot find help on usage of the data grid/ control. Can you tell me if there is any documentation on them.

Really appreciate your help.

Thanks.

Screensaver child process croaks...

ToddTTT12-Nov-03 14:42

ToddTTT

12-Nov-03 14:42

If Windows starts my screensaver, when the screensaver stops running, child processes stop running as well!

Why I'm starting a child process in my screensaver is another story(it's not a virus or anything).

If I start the screensaver myself by double clicking on it, when it stops running its child process remains running.

Any ideas? I'm guessing it's a security feature, but I'd like to get around it if possible.

Thanks!
Todd

Creating a dialog from a COM dll

Matt Gates12-Nov-03 14:31

Matt Gates

12-Nov-03 14:31

I am trying to display a CDialog derived class froma dll using COM. The COM stuff is working. It seems that my dialog is failing to create its own m_hWnd:

void __stdcall CMattDlgCmpnt::HtmlMsgBox( HWND wndParent, BSTR strmsg )<br />
{<br />
CWnd* pWnd = new CWnd();<br />
pWnd = CWnd::FromHandle(wndParent);<br />
<br />
CNormalDlg *wndNormalDlg = new CNormalDlg( pWnd );<br />
wndNormalDlg->DoModal();<br />
}

Debugging yields the following:

{CNormalDlg hWnd=0x00000000}

I tried doing this as well:

CNormalDlg *wndNormalDlg = new CNormalDlg( pWnd );<br />
wndNormalDlg->Create(IDD_DIALOG1);<br />
wndNormalDlg->ShowWindow(SW_SHOW);

But then I get an nasty ASSERT here:

#ifdef _DEBUG<br />
	if (!_AfxCheckDialogTemplate(lpszTemplateName, FALSE))<br />
	{<br />
		ASSERT(FALSE);          // invalid dialog template name<br />
		PostNcDestroy();        // cleanup if Create fails too soon<br />
		return FALSE;<br />
	}

Any ideas. Thanks.

Matt (Padawan Learner)

Re: Creating a dialog from a COM dll

Prakash Nadar13-Nov-03 0:19

Prakash Nadar

13-Nov-03 0:19

Hahahaha, i pity you man, coz you just dont know where the problem is Big Grin | :-D

.
dont worry i have been there too.
just add this line at the start of the CMattDlgCmpnt::HtmlMsgBox method.

AFX_MANAGE_STATE(AfxGetStaticModuleState())

if this doesnt solve ur problem, ur then on ur own.
basically MFC dialogs and COM are not a good mix. u should try to use WTL or win32 way of poping a dialog.

The world is becoming small and so are the people.

How can I convert the JPEG files to thumbnails?

ElizabethC12-Nov-03 12:57

ElizabethC

12-Nov-03 12:57

I want to write an application to convert the jpeg files to thumbnails. Can you tell me where to start?

Elizabeth

Re: How can I convert the JPEG files to thumbnails?

Andrew Walker12-Nov-03 18:40

Andrew Walker

12-Nov-03 18:40

Try libjpeg. It's fairly low level so you should be able to do pretty much anything you need to do with jpegs.

Lib JPEG[^]

If you can keep you head when all about you
Are losing theirs and blaming it on you;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts you aim;
Yours is the Earth and everything that's in it.

Rudyard Kipling

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