C / C++ / MFC

2-Jan-06 22:15

geeta_patil wrote:
how to kep the right pane empty

Just have an emtpy view.

Jesus Loves You and Me Smile | :)

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Eytukan3-Jan-06 5:28

Eytukan

3-Jan-06 5:28

hey i'm noticing it now only. you have slimmed down like me!!~~[b]~~ now we both look similar with our color,weight and marquee!! cheers Beer | [beer]

"But your mind is very complex, very tricky. It makes simple things complicated. -- that's its work. And for centuries it has been trained for only one thing: to make things so complicated that your life becomes impossible."- Osho

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Re: OT

Owner drawn3-Jan-06 16:52

Custom drawn Tab controls

3-Jan-06 16:52

T-1000 wrote:
you have slimmed down like me

Yeap. You've got it buddy.

This one's cool.

Big Grin | :-D

Jesus Loves You and Me Smile | :)

MrNed2-Jan-06 20:00

MrNed

2-Jan-06 20:00

Ive seen lots of examples of completely rewritten tab controls, but has anyone done what should be a relatively simple override of CTabCtrl::DrawItem and called the XP theme functions? I just want an XP looking tab control where I can change the text color of certain tabs, but cant get the drawing to look right Frown | :(

Re: Custom drawn Tab controls

Owner drawn2-Jan-06 21:38

VC++ /updation problem in mfc

2-Jan-06 21:38

An option is...

HiglightItem(nTabNumber, TRUE); //To Turn on highlighting

HighlightItem(nTabNumber, FALSE); //To Turn off highlighting

Jesus Loves You and Me Smile | :)

harshandu2-Jan-06 19:38

harshandu

2-Jan-06 19:38

HI,

There are two classes A and B as follows

class A
{

public:

update_host(CString hostname);

}

class B
{

public:

get_hostname();
}

The get_hostname() gets the hosts name and then calls update_host as folows

A aobject;
aobject.update_host(CString hostname);

now this is what i do in update_host(CString hostname)

update_host(CString hostname)
{

m_hostname=hostname;
UpdateData(FALSE) //to update the value in the edit box.

}

now,when i execute it,i get the error saying

Debug assertion failed.
file:wincore.cpp
line:3095.

Please help in this regards.

Thank you.

HEllo

Re: VC++ /updation problem in mfc

ThatsAlok2-Jan-06 21:08

ThatsAlok

2-Jan-06 21:08

harshandu wrote:
UpdateData(FALSE) //to update the value in the edit box.

I am taking assumption that Class A is CDialog Drived Class, have you checked, that Dialog Box is Visible State at the time UpdateData() is called?

As if the dialog Box is not created before call of UpdateData, the dialog box application likly to crash.

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Does Win32 console application supports WinMain and Winproc functions

chandu362-Jan-06 19:25

chandu36

2-Jan-06 19:25

Does Win32 console based application supports WinMain and WinProc

phani

-- modified at 1:27 Tuesday 3rd January, 2006

Re: Does Win32 console application supports WinMain and Winproc functions

kakan2-Jan-06 19:44

kakan

2-Jan-06 19:44

AFAIK, No.

The presence of WinMain and WinProc is what differentiates a Win32 app from a Win32 console app. A Win32 console app has got the main()-func.

Kakan

Start->Run search path

Chintoo7232-Jan-06 19:17

Chintoo723

2-Jan-06 19:17

What directories are searched for executables when we run a program from Start->Run
dialog box?

It starts MS Word if I just give "winword" in the Run dialog, but my environment variable
PATH does not have the directory "C:\Program Files\Microsoft Office\OFFICE11" which
has winword.exe. Anyone knows how this works?

thanks!

Re: Start-&gt;Run search path

Owner drawn2-Jan-06 19:43

Re: Start-&gt;Run search path

2-Jan-06 19:43

I think it searches HKEY_CLASSES_ROOT\Applications. This is the registry key for all applications currently installed in the system.

These are the applications that are listed in the open with dialog box.

So this could be it.

Jesus Loves You and Me Smile | :)

Michael Dunn3-Jan-06 8:04

Michael Dunn

3-Jan-06 8:04

You can enter an executable name listed under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths

--Mike--
Visual C++ MVP Cool | :cool:

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DateTimePicker Issue

romuzu2-Jan-06 16:09

romuzu

2-Jan-06 16:09

Please help me with my problem.

When I add a MessageBox on OnChange Handler of DateTimePicker and click on the previous and next month scroll button during runtime, the DateTimePicker keeps on changing date. How can I fix this problem?

Detecting setup with hook

Castylx2-Jan-06 15:34

Castylx

2-Jan-06 15:34

Hey Everyone,

Can anyone give me some direction on the best way to detect if a program is starting a setup/installation process for a windows XP machine? I'm assuming that a hook is the best way to intercept the event, but what can I look for? Is there a specific message event or anything that I can look for, a function that always needs to get called when software is being installed?

Any help would be greatly appreciated.

-- Fernando

hardware security

happycpp2-Jan-06 15:31

happycpp

2-Jan-06 15:31

hello everyone...
i want to make a security project that gives the ability to control hardware parts...what i mean is that i want to click a button and the computer no longer sees the usb port and/or the device attached to it as if it's not even plugged(not disable or uninstall it's more like total invisibility)...this also contain not only usb, but ide , scsi , raid controllers etc...
this way no one can connect his "parasitic" drive or what ever you want to call it to my pc...
i think there's another aproach for this(beside the hiding) which is the "accesss denying" i don't know if this way can prevent the system from detecting these peripheral parts...
i tried to look for this kind of articles here in codeproject but i wasn't lucky...
i also tried to get something from my vs-msdn documentation and i found under "Platform SDK: Windows Management Instrumentation" Win32_IDEController and Win32_USBController but i found it really hard and confusing...if this is the right place for documentation please someone make a sample program so i can learn from it...
thanx a lot..

Can't open more than 16 documents in my application

brdavid2-Jan-06 15:04

Re: Can't open more than 16 documents in my application

2-Jan-06 15:04

I am having a rather odd problem with my VC++ application when it comes to opening a certain number of documents. Here's a little background. Each document window that opens is a rather complicated formview run by a rather large and complicated object. The serialization alone saves to a file where the size averages about 200k. when I open around 16 documents, in debug the application pretty much stops working, that is I cannot open anything. Clicking on a menu results in nothing. Clicking the toolbar buttons results in nothing. Navigation completely halts. When run in release the application crashes when i open the 16th document. Sometimes I can get 17.

Now I'm thinking this is a memory issue. Certainly sounds like it. My following questions which I hope someone here can answer are:

1) What do you think this is?
2) If it is memory any ideas on solving it?
3) I was thinking perhaps I could have only the object that is currently active in memory, that is, if a person clicks a document window, then activation that object and clear the rest. Problem here is I have no idea how to do this? Opening up a document takes a bit of time: around 3 to 5 seconds to open a document. If I cleared the object I would have to rebuild it which means a 3 to 5 delay each time we switch to a new document window.
4) Any other ideas?

Thanks for the help! I would include source code, but we are talking a HUGE project here. If you need access to the code I can certainly make that happen. Maybe we can narrow the search down to a few c++ files.

Thanks again!

-- modified at 21:05 Monday 2nd January, 2006

PJ Arends2-Jan-06 15:23

Re: Can't open more than 16 documents in my application

2-Jan-06 15:23

What OS are you using? How much RAM is installed and what is the size of your swap file?

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brdavid3-Jan-06 1:28

Re: Can't open more than 16 documents in my application

3-Jan-06 1:28

Windows XP: Professional, 3GB of RAM installed. Looks like my swap file is 2GB.

PJ Arends3-Jan-06 7:02

Re: Can't open more than 16 documents in my application

3-Jan-06 7:02

With that configuration I doubt very much that you are running out of memory. It could be a resources problem. Have you tried running task manager (taskmgr.exe) while your app is running? Keep an eye on CPU and memory usage, and also watch the number of handles, threads, user objects and GDI objects. If one or more of these get way overused that could be your problem.

brdavid5-Jan-06 4:43

Re: Can't open more than 16 documents in my application

5-Jan-06 4:43

Interesting.... when I reach the 14th or 15th document opened, the CPU usage goes right to 100%. Now it does this everytime a document opens however it goes down once the doc is fully opened. On the 15th doc it stays at 100% which makes sense why I can't run anything else.

I'll start checking a few things. Do you have any ideas yourself?

Thanks for the help thus far! Smile | :)

PJ Arends5-Jan-06 18:28

Re: Can't open more than 16 documents in my application

5-Jan-06 18:28

brdavid wrote:
On the 15th doc it stays at 100%

brdavid wrote:
Do you have any ideas yourself?

Infinite loop.

brdavid6-Jan-06 6:06

accessing non-static variables

6-Jan-06 6:06

okay... I think I'm on to something. Whenever I open a new document the cpu usage peaks, but then doesn't return back to a low number. In fact with each new doc the low value increases until I reach a 100%. Now apparently I can still open up documents but I have a feeling at some point I just hit the limit with whatever is eating up the CPU. I started eliminating logic from the main window, which are tabs with formviews until I got down to one tab. The application now opens up more documents than before and the CPU usage goes back down to under 5 and sometimes zero. So somewhere in my logic for the tabs I have in my main window is causing the problem. I'll give more information when I have it finally nailed.

Thanks for the help. Smile | :)

edit: I have isolated the issue, which makes this even more weird. It has to do with this call:

<br />
	pList->CreateEx(WS_EX_CLIENTEDGE, dwStyle, rect, this, IDC_ITEMLISTCONTROL);<br />

Here's the weird part. I set up the application so that I can control the number of times this value is called per document. If called once per document the cpu usage starts to increase the more documents I open until it peaks at 100%. This happens in a custom list ctrl. I have another control that uses the same CreateEx method that subclasses ListCtrl as well and I do not have this issue, so somewhere in this MyListCtrl is the issue which happens to be related to CreateEx().

Weird. Confused | :confused:

edit: update:

<br />
int CMyListCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)<br />
{<br />
	CListCtrl::OnCreate(lpCreateStruct);<br />
	//if (CListCtrl::OnCreate(lpCreateStruct) == -1)<br />
	//{<br />
	//	ASSERT(FALSE);<br />
		return -1;<br />
	//}<br />
<br />
	// When the CMyListCtrl object is created via a call to Create(), instead<br />
	// of via a dialog box template, we must subclass the header control<br />
	// window here because it does not exist when the PreSubclassWindow()<br />
	// function is called.<br />
<br />
	//SubclassHeaderControl();<br />
	//return 0;<br />
}<br />

in turning the OnCreate method into this the CPU usage stays low. When I return 0 like it should the CPU starts to increase upwards the more docs I add. This is becoming a rather difficult problem. Cry | :((

-- modified at 18:45 Friday 6th January, 2006

tonyro2-Jan-06 13:37

tonyro

2-Jan-06 13:37

I'm trying to access a variable (this->number) from a separate function in a different file. Is there an easy way to do this, like using a global variable or passing the value between functions as one would in C? When I try to access the variable with namespace::functionname::variable, I get the following error message: error C2597: illegal reference to non-static member 'namespace::functionname::variable'. Any help would be greatly appreciated!

Re: accessing non-static variables

PJ Arends2-Jan-06 15:09