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Ravi Bhavnani wrote:
Tom, do you have a sample that (optionally) includes the mouse cursor in the capture? I expect this would be done by BitBlt'ing the image of the cursor at the appropriate location
Ravi, d you mind me asking why you want this - I'll explain why I'm asking after you respond 
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
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Oh I just thought it would be cool to see the source behind this. Most commercial screen snaggers offer this feature, but I haven't seen any source code examples.
/ravi
"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com
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The reason I ask is that I've recently discovered a major problem with other screen capture programs regarding screen figures in my book. In one of my mouse demos, the client area is divided into the number of areas representing the number of system-available mouse cursor shapes. When the user "mouses over" a given area, the cursor changes into that particular cursor and the text in the client area indicates the current cursor.
However, when I tried to take a screen shot of my application, the screen capture utilities always changes the current cursor to the default cursor! The problem with this is that on my figure, the client area text states one thing and the actual cursor is another. Therefore, as I'm writing this screen capture demo (for the GDI/bitmap chapter), I'm wondering if I'll be able to capture what the cursor truly is. I'm hoping that it's simply an oversight of many screen capture writers and that they just didn't, or care, about this anomoly.
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
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Aha!
Perhaps simple-minded screen capture apps bitblt the cursor obtained from LoadOEMCursor() instead of using GetCursorInfo(). Methinks the latter should return the right cursor, but I haven't tried it.
/ravi
"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com
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That's definitely what I'm hoping.
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
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Ravi Bhavnani wrote:
Btw, would it be possible to post your demo at CP? I'm sure a lot of folks (me included) would love to see it!
Sure. I didn't think too many people would care for it since it's so specific to a given usage of GDI. However, when I finish, I'll definitely post it.
Cheers,
Tom Archer
Author, Inside C#
Author, Visual C++.NET Bible
A total abstainer is one who abstains from everything but abstention, and especially from inactivity in the af
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Thanks!
/ravi
"There is always one more bug..."
http://www.ravib.com
ravib@ravib.com
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Thanks for the reply, but I don't think this solves my problem. After capturing the screen, I need access to the image data in order to do some processing, and GetDIBits is far too slow. I need to capture the screen into a buffer which I can access, and all this needs to be done as quickly as possible. Any other suggestions? Thanks!
By the way, blt'ing into a DC with a DIBSection is equally slow. I suspect it internally calls GetDIBits.
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Oops! I responded into the wrong thread. Sorry for any confusion caused.
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hello
i was wondering what was wrong with the following code:
lr = strlen(menu);
lr is an intiger,... the reason i want to use strlen is because:
my program accepts a letter for you to tell the computer what you want... when you put in more than one character into the cin << menu, the program breaks down and goes non-stop through the main loop.
thanks for your help!
~SilverShalkin
![Rose | [Rose]](https://www.codeproject.com/script/Forums/Images/rose.gif)
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The problem is you should be using C++ instead of C. Make menu a std::string and use menu.length() to find out how big it is.
Otherwise, if menu is a char array, try strlen(&menu[0]); It's probably something like that, but I'm not sure - I don't program much C.
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
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Christian Graus wrote:
The problem is you should be using C++ instead of C. Make menu a std::string and use menu.length() to find out how big it is.
Hmmm, not everyone want to use STD, I don't like it and try to avoid it when I can. And depending on what you are programming it's not always a good idea. I spend a lot of my time programming server applications where I need all the speed I can get, and a std::string is way slower than a char array 
- Anders
Money talks, but all mine ever says is "Goodbye!"
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Anders Molin wrote:
Hmmm, not everyone want to use STD, I don't like it and try to avoid it when I can.
Why don't you like it ?
Anders Molin wrote:
depending on what you are programming it's not always a good idea.
I have no doubt, but while that may be the case, overall, too many people use clunky C style strings and so on IMO. They are not safe, they are hard to use, but yes, they are faster in some instances. My main beef is that Universities do not teach C++, they teach C with classes.
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
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Christian Graus wrote:
Why don't you like it ?
Hmmm, I think most of STL makes things hard to use, yes, I really do...
The strings are slow, the documentation sucks, and I don't like the way you use it...
Christian Graus wrote:
I have no doubt, but while that may be the case, overall, too many people use clunky C style strings and so on IMO. They are not safe, they are hard to use, but yes, they are faster in some instances.
Well, C strings are not that hard to use, sure, there's a lot more that can go wrong, but there's also lot's of bennefits 
Christian Graus wrote:
My main beef is that Universities do not teach C++, they teach C with classes.
I don't know about what they teaches, but I'll agree with you on that one
- Anders
Money talks, but all mine ever says is "Goodbye!"
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Anders Molin wrote:
Hmmm, I think most of STL makes things hard to use, yes, I really do...
The strings are slow, the documentation sucks, and I don't like the way you use it...
I dunno about the string speed, I've never had to stress it. Beyond that, the docs in MSDN suck for a reason, but there are plenty of good books out there, and std::string is a long way from being a central feature. What do you use for containers then ?
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
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Christian Graus wrote:
What do you use for containers then ?
Well, a long time ago when I first tried templates I wrote a template-based list which I today use for almost everything. It's small fast and works for everything I need
- Anders
Money talks, but all mine ever says is "Goodbye!"
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Well, if you don't need a variety of containers or built in algorithms then I suppose you've duplicated the idea of the STL all by yourself
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
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- Anders
Money talks, but all mine ever says is "Goodbye!"
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I don´t really understand what are you trying to acomplish, but strlen counts the characters on the string until it finds a '\0', like "stan\0", so, if menu is declared as a char, there is no room for the ending mark (\0) and it keeps reading your program memory until it finds an invalid address or an address that has a 0 value!
hope this helps!
Gabriel
don´t worry drink happy
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Ok... i just jumped on to ask another question and saw the continuation of this question  first off... char is not a pointer. its a character.... "wait i think i just figuered out my problem with my program " anyways... they reason i want to do it is to make the user of the program not beable to enter more than one char... because if you do, then problems accure "thats the thing i just figuered out"
if i just make it for that the char is bigger like char[10] or somthing,... than would you run into problems entering more than one character? "most likly not." but the question remains.
ok cristian, im going with you on this one the problem is: how do you declare my char menu as a std::string?
Thanks everyone for your posts... "see you in the next question "
~SilverShalkin
![Rose | [Rose]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/rose.gif)
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hey folks...
sorta new to COM programming and i have a question. i've read in several places that it may be a bad thing to call CoInitialize\Ex in a .dll. currently, i have a dll which incorporates DirectShow to play files, navigate streams.. etc. i instantiate COM directly in this dll for the purposes of calling DirectShow interfaces. however, i do not do this in the dllmain function. the calling app, which includes this dll statically at link time, does not have it's own CoInitialize\Ex call. Lately, i've been experiencing strange, erratic behavior in the application, at times causing complete system failure. so i was wondering, is it generally a bad thing to call CoInitialize\Ex within a dll? or doesn't it matter..
thanks..
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Is it bad? Not inherently. But that isn't the whole story.
In an application controlled 100% by you, then you can place your CoI/CoU in an OCX if you want to. As long as you follow the proper rules nobody cares.
But, if you aren't in control of the main application, then it is a VERY VERY bad idea to call CoI/CoU from any thread NOT MANAGED by you. If you create a thread, then feel free to call CoI/CoU in that thread all you want.
Tim Smith
I know what you're thinking punk, you're thinking did he spell check this document? Well, to tell you the truth I kinda forgot myself in all this excitement. But being this here's CodeProject, the most powerful forums in the world and would blow your head clean off, you've got to ask yourself one question, Do I feel lucky? Well do ya punk?
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Again with the modeless....
I asked how to correct the layering of modeless windows and the "parent" CMainFrame application dialog. Thanks for answers, but...
NOW I have the question of multiple modeless dialogs and the same layering issues.
The focus changes ok between the modeless dialog and the CMainFrame dialog (the one with the menu/toolbars). The layering between (sub) modeless dialogs does not work as expected - the dialog with focus does not rise to top above other modeless dialogs
Help
Thanks.
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Are you sure that all your modeless dialogs use the desktop as their parent window?
Nish
Check out last week's Code Project posting stats presentation from :-
http://www.busterboy.org/codeproject/
Feel free to make your comments.
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