How to detect that IE 4.0 Installed? - C / C++ / MFC Discussion Boards

Aoife7-May-02 0:31

7-May-02 0:31

Hi,

I have two Dialog boxes, Dialog1 and Dialog2.

I need to populate a Combo Box in Dialog2 from Dialog1.

When I use the following lines in Dialog1 it compiles without error.

CDialog2 ob;
ob.m_cComboBox.ResetContent();

However when I run it (and when it reaches the 2nd line above)I get a Debug Assertion Failure in File: afxwin2.inl at line 741 which is this line.

{ ASSERT(::IsWindow(m_hWnd)); ::SendMessage(m_hWnd, CB_RESETCONTENT, 0, 0); }

The Combo Box properties are, Type: Dropdown, Owner draw: Variable

Thanks in advance for any help,

Aoife

Re: Debug Assertion & Combo Box?

Ganesh Ramaswamy7-May-02 0:38

Ganesh Ramaswamy

7-May-02 0:38

chk whether both dialog boxes r created. looks like one dialog is not created and the other is trying to fill the combo box of that uncreated dialog

Re: Debug Assertion & Combo Box?

Nish Nishant7-May-02 0:49

Nish Nishant

7-May-02 0:49

Aoife wrote:
CDialog2 ob;
ob.m_cComboBox.ResetContent();

This will naturally cause problems. The MFC object has been created. But the window it wraps has not been created yet [in this case, it's the dialog window]

Do this instead. Use DoModal to bring up the dialog and put the combo box reset line in it's OnInitDialog function.

Regards
Nish

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Re: Debug Assertion & Combo Box?

Aoife7-May-02 1:16

Aoife

7-May-02 1:16

Thanks but that isn't going to be much good to me because later in Dialog1 I need to .AddString() to the ComboBox.

I guess what I'll have to do is write the items that need to be put into the ComboBox to a file in Dialog1 and then read them from the file when Dialog2 is opened and put them into the ComboBox. Unsure | :~

Thanks for your help anyway.
Aoife

Re: Debug Assertion & Combo Box?

Niklas L7-May-02 1:55

Niklas L

7-May-02 1:55

...or use a CStringArray member in Dialog2, which you fill from dlg1. In Dialog2::OnInitDialog, fill your combo from the array.

Device Drivers

Sameer Maggon7-May-02 0:24

Sameer Maggon

7-May-02 0:24

Hi,
I want to learn Device Drivers under Windows..
I know DDK is used.. Can neone tell me what should
i start with.. I mean the simplest driver of all.

Please provide some resources also.

Thanx
Sameer

Re: Device Drivers

Wolfram Steinke7-May-02 0:34

Wolfram Steinke

7-May-02 0:34

That is probably the RAW print driver.

Happy programming!!

How to detect that IE 4.0 Installed?

Alex Cramer6-May-02 23:53

Alex Cramer

6-May-02 23:53

I use WebBrowser ActiveX Control in simple dialog based application, and I want to ensure, that this control is installed on user's system. I tried to handle CDialog::DoModal return value (-1 if unable to create the dialog), but some strange thing happens... After failing dialog creating MessageBox() doesn't dispalyed (sorry, if my english is wrong). I can't understand the reason, may be there are some other simple methods to detect that IE ActiveX presents?

Re: How to detect that IE 4.0 Installed?

Christian Graus7-May-02 1:17

Christian Graus

7-May-02 1:17

Check the registry - IE stores it's version there, something like HKLM/software/Microsoft/IE/versions.

Christian

The tragedy of cyberspace - that so much can travel so far, and yet mean so little.

And you don't spend much time with the opposite sex working day and night, unless the pizza delivery person happens to be young, cute, single and female. I can assure you, I've consumed more than a programmer's allotment of pizza, and these conditions have never aligned. - Christopher Duncan - 18/04/2002

write to file

6-May-02 23:44

hi what would the code be for me to write text to a file and also being able to open the file by clicking on a button
thanks

Re: write to file

Maxwell Chen6-May-02 23:59

Maxwell Chen

6-May-02 23:59

To write something to file:

void CTest03Dlg::OnButton1() 
{
	CString	s("Hello test....\n\n");
	
	std::ofstream	f("MyText.txt", std::ios::app | std::ios::out);
	f.write(s.operator LPCTSTR(), s.GetLength());
	f.close();
}

To open the file:

void CTest03Dlg::OnButton2() 
{
	WinExec("Notepad MyText.txt", SW_SHOW);	
}

Maxwell Chen
People say "No news is good news". Then, no code is good code!?

Re: write to file

7-May-02 5:12

do i need to include anything else to this? as im getting lots of errors

Re: write to file

Maxwell Chen7-May-02 15:56

Maxwell Chen

7-May-02 15:56

Yes, class fstream is of C++ Standard Library, you have to include <fstream>.

Maxwell Chen
People say "No news is good news". Then, no code is good code!?

Get System Memory

Sameer Maggon6-May-02 23:38

Sameer Maggon

6-May-02 23:38

Hi,
How can i get the Used System Memory and
System Memory Free..

Thanx
Sameer

Re: Get System Memory

moliate6-May-02 23:57

moliate

6-May-02 23:57

If using PSAPI (Win NT/2k/XP) try GetProcessMemoryInfo

On the NT archetecture memory information is mapped to a memory object in the registry. Check "Performance Objects and Counters" in MSDN and WINPERF.H.

/moliate

Get the size of a specified folder

Cheickna6-May-02 23:34

Cheickna

6-May-02 23:34

Hi,

I want to get the size of a specified folder like this :

HANDLE hDir = CreateFile ("C:\\MyFolder",
GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_DELETE,
NULL,
OPEN_EXISTING,
FILE_FLAG_BACKUP_SEMANTICS,
NULL
);

Then i pass a directory handle to the GetFileSize function

DWORD isize = GetFileSize(hDir, NULL /*lpfilesize*/ );

This code don't work. I try this second function :

PLARGE_INTEGER lpFileSize;
GetFileSizeEx( hDir, lpFileSize );

It don't work

Can anybody help me.

Thanks in advance

Re: Get the size of a specified folder

l a u r e n7-May-02 1:23

l a u r e n

7-May-02 1:23

ummm a folder doesn't have a size as such ... its the sum of the sizes of all the files / folders in the folder

do a recursive filesize thing and add them all together

Suspicious | :suss:

"... and so i said to him ... if it can't dance and you can't eat it either f**k it or throw it away"
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Re: Get the size of a specified folder

Carlos Antollini7-May-02 3:21

Carlos Antollini

7-May-02 3:21

No, you need to get the size of each file in the folder...;)

Best Reagards...

Carlos Antollini.
www.wanakostudios.com
Sonork ID 100.10529 cantollini

How to Create new Class in MFC

6-May-02 23:32

please help me, I need to create one class have (button, static text, edit box..). How to write code???

Re: How to Create new Class in MFC

Eugene Pustovoyt7-May-02 0:22

Eugene Pustovoyt

7-May-02 0:22

Do you want create derived class from button, static etc...?

Eugene Pustovoyt

How do I add a menu to a dialog ?

yarp6-May-02 23:30

yarp

6-May-02 23:30

This is maybe a silly question. I thought it would as easy as adding an IDR_MAINFRAME menu to my dialog resource, but the miracle didn't occur Dead | X|

Should I create a CMenu and associate it to my dialog or is there a clever MFC mean ?
Thanks

Yarp

Re: How do I add a menu to a dialog ?

Ganesh Ramaswamy7-May-02 0:42

Ganesh Ramaswamy

7-May-02 0:42

right click on the dialog and open properties. look there, u will find a combo box for choosing the menu

Re: How do I add a menu to a dialog ?

yarp7-May-02 6:28

yarp

7-May-02 6:28

Hi Ganesh, this was obviously a silly question. I feel stupid but it doesn't matter I got it now. I spent 2 hours this morning trying to append my menu to the dialog. I thought many things but I could never figure it would be as simple.
Thanks a lot.

Yarp

Re: How do I add a menu to a dialog ?

Michael Martin7-May-02 3:24

Michael Martin

7-May-02 3:24

Yarp

I have sent you a direct email with a sample project containing a dialog with a menu. Haven't looked at it in a while so won't make any comments here on how to do from my feeble memory.

Michael Martin
Australia
mjm68@tpg.com.au

"He orginally got the Tweezers of Destruction through the scanners but then popped back outside for a smoke."
- Chris Maunder 26/03/2002

Re: How do I add a menu to a dialog ?

yarp7-May-02 6:38

yarp

7-May-02 6:38

Hi Michael, another way to create a menu. The way I was looking for and as there's also a status bar this is twice interesting for me. I compiled the project with VC6, it is still workable.
I'm doing an MFC dialog embedded in a dll with no MFC in the root program, so I emulate a CView behaving dialog from a CDialog class.
Thank a lot for the .zip file, CodeProject is really a cool C++ forum.

Yarp

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