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Can anyone advise on this problem on Visual Studio 2005 MFC application?
When I add any new variables; e.g. say a structured array of some 256 elements my program crashes with an exception where the code was OK in all previous versions.
I am assuming that I have reached some limits on heap or stacks etc. and think that addresses/pointers are being overwritten.
Can some suggest and options to set to increase the programs resources.
Note the program reads in some large files and uses the CStringArray for lots o string processing.
Many thanks,
Graham.
grahamfff
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What precisely was the exception? Any relevant code that you can show us?
“Follow your bliss.” – Joseph Campbell
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I just tried to invoke the crash and the code section it occured in, but the problem has gone away. I did a work around when I encountered this crash and just wanted to try and sort it out now.
I just wondered if I used a #define items inside the structure I has defining.
Anyway should I worry about the data segment of the program as I am processing very large text files as already I needed to upgrade counters from short to int.
Regards,
Graham.
grahamfff
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My guess is that by adding an extra entry then you changed the alignment of memory, and exposed an old bug where it accessed invalid memory.
Usually these bugs are hidden again by modifying the application again so the alignemtn of memory changes again.
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Hello
When a TextBox is disabled the contents of that will all become greyish.
How to avoid that, and keep the contents in black even when
the TextBox is in disabled state?
Thanks in advance
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You should really stick to the standards, otherwise your UI will be a hell to use. Maybe you don't want to disable the edit box but set it read-only[^] ?
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Handle the WM_CTLCOLORSTATIC[^] message.
This message is sent when a read-only or disables text box needs to be painted.
The wParam parameter is the handle to the device context of the text box.
You can select a black pen into this device context using SelectObject[^] which will make the text black.
If you're using MFC override the OnCtlColor[^] function.
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Superman,
Do you have any sample code that explains how to do this?
Thanks
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Does Google not work in your neighborhood? He gave you the functions/messages to use, so how hard can it be to find samples of them?
"One man's wage rise is another man's price increase." - Harold Wilson
"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons
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Superman,
I am using an Edit Control.
I tried using the WM_CTLCOLORSTATIC message and added the,
SetBkCOlor and SetTextColor function.
But this is not working
Is it due to the fact that am using Edit Control?
I also tried using SelectObject and passed a BLACK brush, but that also doesn't seem to work
As soon as the Edit Control is disabled, the text in Edit Control becomes grayish.
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You have to use SelectObject and pass in a BLACK pen, not a brush.
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Inside WM_CTLCOLORSTATIC, i check whether lParam is equal to Edit Control handle, if thats TRUE
then i CreatePen by passing RGB(0, 0, 0), the resultant PEN is
then passed to SelectObject(HDC, PEN);
But this is not working. Any idea why it's not?
Do i need to "return" something for the WM_CTLCOLORSTATIC ?
Like, GetStockObject or something?
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If your pen that you created is going out of scope when WM_CTLCOLORSTATIC returns then it will be destroyed and the control will be greyed. Watch your object lifetimes.
If this does not help, then post some code.
You may be right
I may be crazy
-- Billy Joel --
Within you lies the power for good - Use it!
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Instead of disabling the text box, just set it to read only (hine - ModifyStyle) - the text will stay black.
Hope that helps.
Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193
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Problem with setting to read only, is that it will let the user select the text using
the mouse.
Where as in disabled mode, it will not let any mouse selections.
I tried using WM_CTLCOLORSTATIC but not able to make just the text BLACK
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So what's wrong with letting the user select the text - they can't change it, and they may want to copy it and paste it in the clipboard or another app. (You can also disable the tab stop so they can't tab to the control but would have to use the mouse to select the text.
Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193
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Hi,
I hope i posted in the right message board.
Here's the thing.
I recently bought a PCI Tv Tuner with a remote control (AverMedia Hybrid 007) and i want to use that remote control to control my PC (maybe create a basic media center application using media players that support slave mode, something like mplayer).
The way i see it i have two options:
1. Using the existing driver that came with the card
2. Writing a new driver that will interface only with the card's ir sensor
And now my questions / troubles:
Using method 1:
Is the driver "generic" enough so i can use it in another application, or is it binded to the application that came with the pci card. I know this question is kind of stupid but i don't know how else to put it?
How can i access the card's driver in Visual C++. I have read that getting a device driver handle is done by using the CreateFile() function, but i can't find the device name (something resembling "\\\\.\\Driver"). Do you know a way to find it out. I don't really need code, but some pointers to existing documentation. Anything will be helpfull.
Using method 2:
To be able to write a driver for the device, do i need to know the hardware specifications of it? If yes, can i use some sort of probing to access it's features?
I come from a web development background, but i have had some experience with C/C++ and i'm a quick learner.
I don't need existing application to resolve my problem because i want to learn how to do it myself; and yes i have searched google but all i got was documentation regarding pci drivers in linux and some vague tutorials regarding pci drivers in windows.
Any kind of help will be appreciated.
Thanks in advance,
Vlad Balmos
modified on Wednesday, December 9, 2009 7:38 AM
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You can use CreateFile to communicate with the driver only if the driver exposes a symbolic link just like COM1 is a symbolic link to the actual serial port. You're card driver's documentation should have this. You can also check using the Winobj[^] tool from Sysinternals.
If you're card has IR, you can communicate using Windows sockets.
Windows sockets supports TCP, UDP, IR and bluetooth.
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I couldn't find the symbolic link for the driver, and i don't think the ir supports socket access. I scanned for ports and didn't find anything related to ir.
But i found another way of doing things:
It seems that the application that came with the pci card, registers the remote as HID, and emulates a basic mouse using a few buttons on the remote. I could use this method or try and hook into the service that listens for remote events and hijack the service calls to the existing media application (i'm not sure if this could be done).
Anyway, thanks for the help _Superman_.
Best of luck!
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I did CreateProcess and then FindWindow to get PowerPoint viewer window handle. How can i resize slide show to specific location & size on my Window? Also any way to prevent powerpoint viewer from starting the slideshow in fullscreen soon after the process is started?
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I don't know of any C++ way of doing this, which makes this forum less useful to you.
My thought was that you could supply powerpoint viewer with a command parameter via CreateProcess that would do what you want.
I found this page:
http://office.microsoft.com/en-us/powerpoint/HA101538891033.aspx[^]
But there's no "start at this rect(100,100,400,200)" parameter, or an equivalent.
The nearest I can find on that list is /M macro which lets you run a specified macro. Maybe you could have a powerpoint macro that does this task for you?
Failing that, maybe the full version of powerpoint will have better command line options - in which case you can solve your problem by spending money.
My thinking is that you'll fail - a presentation is meant to fill up a given screen, in which case why spend the resources needed to make a partial screen view? It's a very edge case use.
I wish you success however!
Iain.
I have now moved to Sweden for love (awwww).
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This is not "a very edge case use". This is a very common use. If you totaled all the time PowerPoint files are open on all PCs, I believe you will find many more hours were with people viewing the PPT on their computer (just as they would read a PDF or Word document) and much less time as part of presentations where full screen usually makes sense. I almost NEVER want to view a PPT on my PC in full screen. 1st on a large monitor it is often too big to view comfortably, and I usually want to switch between the PPT and other applications, often leaving the PPT visible to a page while working in a different window.
Making the PowerPoint Viewer 2007 only display in fullscreen is another anti-consumer action by Microsoft to annoy people enough to buy Office 2007. What is needed is the PPT viewer equivalent to the Foxit PDF Reader, for those who want to view but don't need to create PPT files. I don't know of any free alternative viewers that support PPT 2007 format, except maybe OpenOffice and that is pretty heavyweight is all you want is a PPT viewer. It would be great if it were possible to launch the PPT Viewer 2007 from C++ or C# so that it was not fullscreen, but as you mention it does not appear possible from the documentation.
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Wow, you have been looking a long way back in this forum! 8th december...
I have to agree that it would be nice if you could open ppt viewer at a specific location.
But what's in it for microsoft? Partly I'm cynical, and partly I sympathise as I program for a living - but I'm pleasantly surprised there's a free viewer at all. I consider it's very reasonable to expect anyone who wants to do more that just view slide shows to pay money to the authors of the software.
It's not anti-consumer of ford to expect you to give them money if you want to ride in a car.
Someone who makes the presentation is quite capable of printing it to (eg) pdf for other viewing. Or export to flash (allegedly).
Yours a-professional-software-writer,
Iain.
ps... if you want a full screen app in a window... Virtual Machine.
I have now moved to Sweden for love (awwww).
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I used to use the form designer back in visual C++ 2005 express, and there was some ~200 odd controls in the toolbox that I could place in my forms.
Now in visual studio 2008, I get something like 30 controls to choose from, with many useful ones missing. If I right click on the toolbox and select show all, it brings up a much larger list of controls, but 95% of them are greyed out. I can confirm that this doesn't have anything to do with a faulty installation of visual studio, as I use visual studio at university as well, where they are also missing 95% of the controls. I can't even insert a hyperlink control!
image of my toolbox
Anyone got some ideas as to why I can't access the controls, and how to make it so I can? Honestly I think they're trying to push .NET forward as much as possible and in order to persuade developers, they're cutting everything but the most basic stuff from the C++ form designer. Yep. Better put on your tinfoil hats.
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