Re: i want to create my own takbar... - C / C++ / MFC Discussion Boards

Re: Weird pointer behavior

Maximilien14-Feb-05 8:38

Maximilien

14-Feb-05 8:38

it's not a copy, he passing approach by reference.

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: Weird pointer behavior

TFrancis14-Feb-05 8:52

TFrancis

14-Feb-05 8:52

If, GetAddressOfApproachSomePlaceElse() calls new, then yes, this would be a memory leak. If in your function you want to change what object a pointer points to (not the object itself, but what object it points to), then one technique is to pass it a pointer to a pointer.

CApproach* pApproach = NULL;
GetNextApproach(&pApproach)

void GetNextApproach(CApproach** ppApproach)
{
*ppApproach = GetAddressOfApproachSomePlaceElse();
}

If you simply pass it a pointer, then it makes a copy of the pointer (not a copy of the object, but a copy of the pointer to the object). Any changes you make to the pointer (not the object, but the pointer to the object) will not be kept when the function returns, they are thrown away with the copy of the pointer.

Hope this helps,

Tim

Re: Weird pointer behavior

Christian Graus14-Feb-05 15:02

Christian Graus

14-Feb-05 15:02

The correct approach would be:

CApproach* approach = GetNextApproach();

The other responses solve the problem ( not passing by reference ), but they ignore the fact that you're passing null in, all you want is for the value to be returned.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Splitting with the existance of COutlook2Ctrl

Mohammad Tarik14-Feb-05 6:10

Mohammad Tarik

14-Feb-05 6:10

I want to include the Outlook2Ctrl in a program, but I also want to split the right side area ( which is the remaining part ) horizontally into two panes.
I used a class derived from CSplitterWnd (by Daniel Zuppinger) and it's on this site. But I couldn't do it.
I tried to split, first vertically [CView || NULL]
then using the NULL pane I splitted the right vertically. But couldn't include the Outlook2Ctrl in the CView place.

Please help me...even by a hint...even not using the upper-mentioned splitter class. Cry | :((

Thanks

Re: Splitting with the existance of COutlook2Ctrl

rocky_pulley14-Feb-05 7:35

rocky_pulley

14-Feb-05 7:35

It sounds like you need to create your own class that inherits directly from CView, then add the Outlook2Ctrl control to that window. When the window is resized, call MoveWindow on the outlook control to make it the same size as the view.

-- Rocky Dean Pulley

Re: Splitting with the existance of COutlook2Ctrl

Mohammad Tarik14-Feb-05 12:18

Mohammad Tarik

14-Feb-05 12:18

The author of the Outlook2Ctrl had written "the outbar docks normally on the left side of the main frame", and in his demo, he included the Control in the MainFrame directly. So I am not sure, probably this control was meant to use some properties of the CFrameWnd class.

I didn't sail into the class itself (Outlook2Ctrl) yet, because of the lack of time. And I thought that probably someone has done what I am looking for now.

Anyway, thanks "Rocky Dean Pulley" for taking the time to reply to me. Probably I should do what you've said but with modifying COutlook2Ctrl itself also( or only).
If there is any further suggestions from anyone here, I would really appreciate it.

////////////After sometime//////////////
when I read what I have written above I noticed that I had some of the answer(it docks on the left side). So I remembered that I first tried to include the control and split the remaining to two parts horizontally....it didn't work at that time for a reason not related to it directly, I fixed that thing and continued working and trying other approaches forgetting the fact that it wasn't the real reason.
So I fooled myself at that point. Sorry for bothering. Sigh | :sigh:

i want to create my own takbar...

14-Feb-05 5:33

Hi,

I have a requirement to hide the existing taskbar and place my own taskbar there. How can i do it? The existing taskbar's class is "Shell_TrayWnd", which is not available in mfc. Should i use "Toolbars" or "rebars". I would be of great help if someone could provide me code samples. Is there anyway by which i can change the existing taskbar apperance, like changing the font, color, font size, etc...

regards,
Jayashree

Re: i want to create my own takbar...

rocky_pulley14-Feb-05 7:36

rocky_pulley

14-Feb-05 7:36

You may want to look for some articles on replacing explorer as the shell. Is this really what you want to do? If you want to replace the task bar you will probably want to replace the shell itself as well.

-- Rocky Dean Pulley

Re: i want to create my own taskbar...

jaisri_g15-Feb-05 4:05

jaisri_g

15-Feb-05 4:05

hi,

Thanks for your reply. Actually i don't want to replace explorer. I just want to restrict the user from using the normal taskbar. I can hide the existing taskbar by getting the windowhandle. Now i want to replce it with my own taskbar with restricted features. I need this because i my app runs on a TV which is of a less resolution. So i have to increase the font size, colors or may be use bitmaps. If it is possible to alter the appearance of the existing taskbar too, then i want to try that also.

regards,
Jayashree

Setting up multiple-port TCP/IP printers with TCPMON Xcv Commands

TweakIt14-Feb-05 5:31

TweakIt

14-Feb-05 5:31

The available MSDN documentation is quite clear on the proper methods for setting up a TCP/IP printer connection using the TCPMON Xcv Commands, and I have had reasonable success in this area.

I came up dry when I started looking for information on specifying the IP Port (rather than the "Printer Port") that will be used to send data to a given TCP/IP printer. Certain TCP/IP printers (like HP JetDirect) expose multiple IP ports and one IP address.

Advanced Google searches have returned thousands of false hits on other uses of the word "port" that I am not interested in. Combining the word "port" with the names of printer-setup APIs does not provide any more clarity. Perhaps I need to use another language in which the same word is not used to describe these completely unrelated objects.

How can I get ride of the 'X' that closes an application.

mcgahanfl14-Feb-05 4:45

mcgahanfl

14-Feb-05 4:45

I would like my SDI/CFormView application to be either minimized or maximized but not zoomed. That much I have done.

But how can I get rid of the 'X' on the menu bar that closes the application?

cs.style = WS_VISIBLE | WS_SYSMENU | WS_MINIMIZEBOX ;

Re: How can I get ride of the 'X' that closes an application.

John M. Drescher14-Feb-05 5:33

John M. Drescher

14-Feb-05 5:33

I am not sure you can get rid of it if you have a minimize box. What I do in an app is gray out the box and handle the OnQueryEndSession() message.

BOOL CCommonApp::DisableClose(BOOL bDisable)<br />
{<br />
	BOOL retVal = (m_pMainWnd != NULL);<br />
	if ( retVal ) {<br />
		CMenu* pMenu = m_pMainWnd->GetSystemMenu(FALSE);<br />
		if ( pMenu ) {<br />
			CMainFrame* pMainFrame = DYNAMIC_DOWNCAST(CMainFrame,m_pMainWnd);<br />
		<br />
			pMenu->EnableMenuItem(SC_CLOSE,MF_BYCOMMAND | bDisable ? MF_GRAYED : MF_ENABLED);  <br />
<br />
		}<br />
	}<br />
	return retVal;<br />
}

John

Re: How can I get ride of the 'X' that closes an application.

Kippesoep14-Feb-05 6:36

Kippesoep

14-Feb-05 6:36

Simply get rid of WS_SYSMENU.

Resource DLL

Franz Klein14-Feb-05 4:13

Franz Klein

14-Feb-05 4:13

How does one create a resource dll containing only bitmaps? Is it just a normal DLL with only bitmaps in it?
Blush | :O

My brain is a bit fuzzy at the moment.
Frown | :(

I am the handsome one in the crowd.

Re: Resource DLL

rocky_pulley14-Feb-05 4:21

rocky_pulley

14-Feb-05 4:21

yes, just create a normal win32 DLL, then add a resource file to it. Now add all the bitmaps you want, just like you would with an application.

-- Rocky Dean Pulley

Re: Resource DLL

Franz Klein14-Feb-05 4:31

Franz Klein

14-Feb-05 4:31

Thanks.

Winter and what the cold does to the brain!!!!

D'Oh! | :doh:

I am the handsome one in the crowd.

Re: Resource DLL

Shog⁹14-Feb-05 7:57

Shog⁹

14-Feb-05 7:57

You might also wish to alter your build settings such that debug information isn't linked in, and there is no entry point generated (/NOENTRY linker option). May as well make it as light as possible... Smile | :)

Shog⁹

I'm not the Jack of Diamonds... I'm not the six of spades.
I don't know what you thought; I'm not your astronaut...

App doesn't shut down propperly

IGeorgeI14-Feb-05 2:45

IGeorgeI

14-Feb-05 2:45

Hey guys

My app has a mem leak which results from ExitInstance() not being called when I terminate the program.

I have traced into MFC and descovered that in the THRDCORE.cpp file, the following code is causing ExitInstance() to NOT be called.

==============================================================
// phase2: pump messages while available
do
{
// pump message, but quit on WM_QUIT
if (!PumpMessage())
return ExitInstance();

==============================================================

Does anybody know what some of causes of pumpMessage() to return true??

Thanks George

George W

Software Developer
www.zsystems.ca

Re: App doesn't shut down propperly

Blake Miller14-Feb-05 5:29

Blake Miller

14-Feb-05 5:29

If your message pump processes a WM_QUIT, then the GetMessage returns false.
Per MSDN ---
"What Is WM_QUIT?
Normal message-processing loops in an application's WinMain routine usually exit when the GetMessage function returns a FALSE value. Internally, if GetMessage is about to return a WM_QUIT message, it returns FALSE instead of TRUE even though the message returned in the MSG structure (a WM_QUIT message) is valid. The only time GetMessage will ever return a FALSE value is when it is returning a WM_QUIT message. Conversely, PeekMessage returns WM_QUIT messages as it would any other message. Applications that use PeekMessage in their main message-processing loop must explicitly look for the WM_QUIT message.

The PostQuitMessage function does not actually post a WM_QUIT message to the application's task queue. Instead, it sets a flag that is tested inside GetMessage and PeekMessage. WM_QUIT is returned when GetMessage or PeekMessage detects that this flag is set and no other messages or events are pending for the application."

Re: App doesn't shut down propperly

IGeorgeI14-Feb-05 6:14

IGeorgeI

14-Feb-05 6:14

That is pure GOLD!

Thank you....I have been struggling with this problem for a while.

I knew exactly where to look as soon as I read that.

Problem fixed!

Thanks again

IGeorgeI

George W

Software Developer
www.zsystems.ca

Setup project

viliam14-Feb-05 2:34

viliam

14-Feb-05 2:34

I tried build Setup project in Visual Studio
Everything works ok, but I am not able to find
how to do some features.

I need to Setup ask user for system reboot after install
...it should be there, but where? Frown | :-(

And I am not sure if it is there but i need Uninstall part
delete whole folder
(program during its lifetime create files and after uninstal
these files are not deleted)

Does anyone know how to solve this?
Thank you

viliam

Hitting F5 ALWAYS asks if I want to build

dabs14-Feb-05 2:18

dabs

14-Feb-05 2:18

Hi,

I have a really annoying problem. When I build my application (which is quite large), the build succeeds and I press F5 to start debugging it, Visual Studio .NET 2003 always gives me this MessageBox:

    These project configuration(s) are out of date:

        ApplicationName - Debug Win32

    Would you like to build them?

If I select Yes, the resources are rebuilt but nothing else. There are multiple resource files in this project BTW. Has this happened to anyone and are there any solutions?

Best regards,
Daniel

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Re: Hitting F5 ALWAYS asks if I want to build

Michael Dunn14-Feb-05 3:07

Michael Dunn

14-Feb-05 3:07

Check the modified dates of your .rc files and any external graphics (.bmp, .ico, etc.). One of those files probably has a date that's in the future.

--Mike--
LINKS~! Ericahist updated! | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ
Strange things are afoot at the U+004B U+20DD

Re: Hitting F5 ALWAYS asks if I want to build

dabs14-Feb-05 3:33

dabs

14-Feb-05 3:33

Thanks for the suggestion Mike, however I can't find any resource file with modified date in the future. Any other ideas?

Best regards,
Daniel

Wenn ist das Nunstück git und Slotermeyer? Ja! Beierhund das oder die Flipperwaldt gersput!

Re: Hitting F5 ALWAYS asks if I want to build

Ted Ferenc14-Feb-05 4:59

Ted Ferenc

14-Feb-05 4:59

Try using 'touch' i.e. http://www.codeproject.com/file/timestamp.asp to change the time stamp to now of all the files, including any that may be in directories other than the project directory.

If that fails do you have a macro running during compilation that changes a file?

i had a similar problem during Windows 3.1 days when the files existed on a server, I never figured it out!

Good luck.

"An expert is a person who has made all the mistakes that can be made in a very narrow field." - Neils Bohr

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