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Use std::vector instead of plain arrays, and at() instead of [].
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It's all nice of you to suggest using vector class instead, but how can I use it to pass a list of items from a VB application into a C++ DLL?
With an array of doubles it's possible and easy ...
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std::vector < double > vec;
..fill vec..
Now &vec[0] is a pointer to an array of vec.size() doubles, that you can pass into dlls, or hand over to VB or whatever. You just cant extend or shrink it on the fly. For this you need to use the vector-interface.
My opinions may have changed, but not the fact that I am right.
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What about the other way around: from VB to C++?
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I have no idea about VB.
But you said your caller gives a number of items and where they are stored, so that you can copy them into a C-Array.
So, simply use resize() to alloate enough space in your std::vector, and copy to the address &vec[0].
My opinions may have changed, but not the fact that I am right.
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in this case, you should probably use an actual vector, as in the STL. Then you'd have no problems at all.
Christian
No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002
C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002
It'd probably be fairly easy to make a bot that'd post random stupid VB questions, and nobody would probably ever notice - benjymous - 21-Jan-2003
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I´m working on a backup service for our customers. Som backup software has an open files option to backup file left opened when the office is left.
How to do that any idea !
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 I have rather wide experience, programming using MFC5 (MFC42.dll) with MS VC++ 6.0. Recently I obtained VS .NET. I've made MFC-application, link MFC as static library and run the app on Win98se. Here I was notified about absence of OLEACC.dll although I did not check to use Accessibility API in MFC app wizard. Then I have made a setup project for my app. It included OLEACC.dll and other required files. This time win98se said that it couldn’t run OLEACC.dll, and ask me to check for contents of this library.
Someone ever met such a problem. Is there any way to build my MFC projects with .Net and run them on Win9x/NT/XP? Or I should use VC6 as before?
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For some reason, VC7 apps seem to always link to oleacc.dll. The way around it is to delay loading it (have it load only if and when required).
First you have to link to delayimp.lib.
#pragma comment (lib, "delayimp.lib")
Then set your app settings
Project => Properties => Linker => Advanced => Delay loaded Dll => Support...
Project => Properties => Linker => Input => Delay loaded DLLs => "oleacc.dll"
Sonork 100.11743 Chicken Little
"You're obviously a superstar." - Christian Graus about me - 12 Feb '03
Within you lies the power for good - Use it!
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I've never had this problem and I've built many programs with VC++7 MFC using VS.NET. All have worked on 98/ME/NT/2000/XP with one exception: A CFileDialog box didn't work properly on a 98 machine.
Art
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Is there a quick and easy way to insert a new element into an existing CString Array? I'd like to know if there is a function to do this or if I just need to set up a FOR loop.
If I have to use a FOR loop, how do I trap on exceeding the size of the Array?
Thanks!
John Hagen
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Use the CStringArray instead, it provides some handy functions like InsertAt,Add,SetAt,etc..
regards
modified 12-Sep-18 21:01pm.
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Hi Gregor,
Thanks for the tip. That's what I needed and it works!
John
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When I have a modeless dialog window opened and I hit enter the dialog will dissapear. I don't want that to happen. If I am editing the data in a control and I hit enter I would like the focus to shift as if I pressed tab. I got the following code from this website but I don't understand it. I can't find WM_GETDLGCODE and on top of that I don't want to create a new class just to capture a message.
UINT SMUPPGrid::OnGetDlgCode()
{
UINT result = CListCtrl::OnGetDlgCode();
result = result | DLGC_WANTALLKEYS;
return result;
}
Can someone tell me how to capture 'enter' and shift the focus from one control to another.
none
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Try overriding OnOK.
Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo
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I don't have an IDC_OK handle to deal with. I have removed that button. How can I override the function when I don't have a handle for it?
none
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Just add a new function called OnOK() in your dialog-class. And be sure not to call CDialog::OnOK()
--
karl
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You can modify how the enter key works by overriding the virtual function PreTranslateMessage()
if (pMsg->message == WM_KEYDOWN && pMsg->wParam == VK_RETURN)
pMsg->wParam = VK_TAB;
this will cause all ENTER keys to be treated as TABs
Roger Allen
Sonork 100.10016
Were you different as a kid? Did you ever say "Ooohhh, shiny red" even once? - Paul Watson 11-February-2003
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I am pretty new at C++ but hello world is pretty far behind me...i can do a lot more than that. Not much, but more. What do i need to know and how much work and how long will it take me to make a good looking 3D shooter with all the DirectX 9 and Cg stuff in it?
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A couple of years, I reckon. The world is full of people who have figured out what a class is, and set out to write games. Check out the game dev sites, they are full of people 'starting the worlds best 3D engine'.
Take a sensible approach. Think about what a game needs, and create projects for yourself to learn those things. Be prepared to scrap 50% of what you learn of the current version of DX in order to use the new version that will come out while you are learning. Try to learn stuff that is more mundane, like data structures/STL/etc. first. Then write a 2D game. Write some 3D demos to experiment with 3D space and physics. Then you might be ready. Even then, remember that a commercial game takes a team of people a good year to write as a full time job.
Christian
No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002
C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002
It'd probably be fairly easy to make a bot that'd post random stupid VB questions, and nobody would probably ever notice - benjymous - 21-Jan-2003
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I learnt to program in C on my first game project way back (for me) in 1995, and whilst I haven't scraped the initial idea I have scrapped 100% of my code and started again almost every year since. This year I haven't scraped it though as it's coming along great, most likely because last year I took the time to lay down a fairly strict design document which I am following. 
I would caution against taking the much-hyped "start simple" approach. I just don't think it offers the level of motivation you will need to actually see a project like a game (where you probably wont have visibly runable code to show for your first few months work) through to completion when you are doing it in your spare time, not unless it is just a simple 3d pong or the like. You need to get used to it, not used to the opposite.
As to whether the original poster has what it takes, only he can tell himself that. I certainly didn't think I did when I started out, and I've been working as a developer for the past two years and am about to start a full time job in a week. It is not knowledge that gets you through these things, it is self-determination and the will - not the raw ability - to keep pushing. As some famous bloke said, even monkeys can write Shakespeare.
David Wulff
http://www.davidwulff.co.uk
I am only here to amuse myself. Anyone else is a bonus.h.a.s: 0.0.4
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David Wulff wrote:
I just don't think it offers the level of motivation you will need to actually see a project like a game
True, a lot of people who want to write games don't have what it takes to be programmers. But if he does, then that is the way to go. As you said with your own game, the alternative is to keep scrapping code as you realise what you needed to know in the first place.
David Wulff wrote:
As to whether the original poster has what it takes, only he can tell himself that.
True. I was trying to point out the pitfalls and hoping he'd respond with 'well, I know *I* can do it', the sort of determination he'll need to see it through.
David Wulff wrote:
It is not knowledge that gets you through these things, it is self-determination and the will - not the raw ability - to keep pushing.
Agreed. I still maintain that involves being willing to take baby steps before trying to take giant ones.
Christian
No offense, but I don't really want to encourage the creation of another VB developer.
- Larry Antram 22 Oct 2002
C# will attract all comers, where VB is for IT Journalists and managers - Michael
P Butler 05-12-2002
It'd probably be fairly easy to make a bot that'd post random stupid VB questions, and nobody would probably ever notice - benjymous - 21-Jan-2003
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carjackermike wrote:
how much work, how long will it take me to make a good looking 3D shooter with all the DirectX 9 and Cg stuff in it
It will take quite some time. I decided that I wanted to make a simple game, Tetris[^], while I was unemployed last year. I treated writing this game like my full-time job until I found a job, and I spent 3 months on it. Part of it was writing the frame work to handle the graphics and sound in directX, the other part was actually writing the game and adding the animations.
I didnt even have to do the artwork or music, my brother created that for me. So if you are on your own, you will need to spend even more time doing that.
A 3D game would be considerable more involved. One thing you can do to minimize the amount of time is to use a free 3D engine that someone else has developed.
carjackermike wrote:
What do i need to know
If you want to write the game engine from scratch, you should study your euclidian geometry, and trig. There are a lot of things that Direct X will do for you, but you still need to understand the basis of the math.
Besides that, it really helps to have a general understanding of all of the basic data types to help you properly organize the code in your game. The better you organize up front, the easier it will be for you to change your game in the end.
I would suggest to pick a somewhat simple game, and implement it, so that you get an idea of what is involved to make a more ambitious 3D game.
Good Luck
Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!
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Depends a lot on what you mean by "good looking".
Consider that it takes 5 to 10 average to excellent experienced game programmers 1 to 3 years to make a "good looking" commercial shooter. And don't forget about the army of artists that are needed too.
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This is the original poster speaking =) I am starting out studying C++ and as of yet i have no idea how to make a GUI program. I know some of the terminology. I have already formed a development team of some friends. We expect to have a finished product by the year 2006. So far there are 3 of us, I handle the hard part, the programming, another guy handles 3D modeling and animation and textures, and the other handles sounds, as he is a professional DJ, and the last guy handles physics. There is a new book coming out called "The Cg Tutorial: The definitive guide to programmable real time graphics, and I thought that that would help me. I do not even know HOW to start, or how to write an engine. Perhaps someone could help and answer all of my burning questions?
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