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It depends on how much control you want over the running process. You could use
WinExec
ShellExecute
CreateProcess
Next, you can use one of the 16 available _spawn() variations, or one of the 16 available _exec() variations.
My advice is to buy a book about the Windows API and one about the C runtime library, and research your requirements.
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Hi I began a course in visual c++ a little while ago and just started actual coding about 2 weeks ago. I have to make a simple dialog based program that calculates a paycheck total. Sounds easy but I havn't been given any calculation examplesfor dialog based therefore I'm stumped as to how to accomplish this task.
what i need is to get the entered text from 2 edit box's, multiply them together and display the total in a third edit box.
I'm embarrased to ask for help on something that seems so simple but i'm stumped. Thnx if anyone can help me out on this one.
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GREETINGS Kron.
So you have 3 textboxes and 3 members- m_1, m_2, m_3(use MFC ClassWizard to create them). All members are int.
void CT1Dlg::OnOK()
{
UpdateData(true);
m_3=m_1*m_2;
UpdateData(false);
}
That's all.
Good Luck!
LOVE & PEACE to everyone
LOVE & PEACE to everyone
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In a programe ,I want to display Windows Metafile ,but I'm failed to do it. So I want to get some help from here!
How can I display WINDOWS METAFILE
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I'm trying to learn ATL and my project is a series of GDI+ graphics filters ( invert, colour, gamma, brightness, emboss, you get the idea ), so I want to create methods like this:
[id(1), helpstring("method DoInvert")] HRESULT DoInvert([in, out] Bitmap * i)
How can I do this ? How can I use COM to pass a Bitmap* into my method ? Is there a way of doing this so that I can still make it an ActiveX control to be used in VB ? Should I care ( i.e. can they access GDI+ anyhow ) ?
Thanks to all who respond....
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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VB can't deal with a Bitmap* object. You mgiht try
[id(1), helpstring("method DoInvert")] HRESULT DoInvert([in, out] HANDLE hBitmap)
VB has certain data type restrictions. If you want your ActiveX to be compatible with VB then you have to use the proper data types in your interface. Look in the docs for a list.
VB can not access GDI+.
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If you need your component to be accessible from VB, you are restricted to using types from the VARTYPE enum - long, IDispatch*, etc. See wtypes.h or MSDN for the full list.
--Mike--
http://home.inreach.com/mdunn/
Sometimes, arming yourself with a big pointy stake just won't do you any good.
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That's pretty much what I thought. So if I discard the idea of VB support, what do I need to do to pass a Bitmap * ? Did I just forgert a #include, or is the problem deeper ?
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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I'll have to defer to someone else on that question - I've done little IDL hacking myself; I've always been able to get by with VARIANTs.
--Mike--
http://home.inreach.com/mdunn/
Sometimes, arming yourself with a big pointy stake just won't do you any good.
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Thanks - I managed to do it with VT_PTR, although passing a void * doesn't thrill me. If anyone knows of an alternative, I'd be pleased to hear it, but my project is away, two filters implimented and working nicely. I have a whole swag written as classes, I just need to turn them in to ATL interfaces. I'm so glad I finally am writing ATL code, I've intended to for 18 months.
Lots of ATL questions coming up.... 
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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As was suggested before pass a HANDLE, but twist it. Since HANDLE is typedef'd as LONG use that.
[id(1), helpstring("method DoInvert")] HRESULT DoInvert([in, out] LONG* hBitmap)
Notice it is also a pointer since it both in and out. I believe you can get the HBITMAP from VB to pass into the method.
What about using IPicture?
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I think that passing in an IPicture is the 'proper' COM approach.
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The thing is, I don't want to pass a CBitmap * or a HBITMAP, but a Bitmap object from GDI+, because that is what I am working with, and I want to use BitmapData* to traverse the bitmap. I suppose I could create a DIBSection, but it would take time and generally be an ugly approach when I have a perfectly good formated object to start with ?
It looks like the VARIANT is going to win... Thanks to everyone for their suggestions.
Christian
#include "std_disclaimer.h"
People who love sausage and respect the law should never watch either one being made.
The things that come to those who wait are usually the things left by those who got there first.
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OK....
So, can you pass pointers to classes through ATL? For now let's assume C++ to C++ only. For instance, could you pass CArchive?
I live in hope...
> Andrew.
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You can pass the pointer as a long, as pointed out earlier. Whether that pointer has any meaning on the other side...
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i need to know how i can delete a cookie or all temporary internet files at once.
Thanks
Kun
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How to retain the child windows' title when moving around different child windows.
I used SetWindowsText but it disappears when other child window is activated.
Gracias
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i need to store the path (only the path) where my .exe file is run from in a string.
 groovy, hehe
oops yea, i also need to know how i can delete a cookie in the temporary internet files folder because they dont seem to act as files
Thanx!
Kun
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I pulled this from my library of routines
Good luck with the cookies
Brad
CString GetLaunchedDir()
{
TCHAR szFullPath[MAX_PATH];
TCHAR szDir[_MAX_DIR];
TCHAR szDrive[_MAX_DRIVE];
CString strLaunched;
::GetModuleFileName(NULL, szFullPath, MAX_PATH);
_splitpath(szFullPath, szDrive, szDir, NULL, NULL);
strLaunched.Format(_T("%s%s"), szDrive, szDir);
return strLaunched;
}
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Hai,
I made a program to input .txt into MS Access.The text file is an output of a math program.Fine.
Now another program retrieves the data and displays it in the list control.Not fine.
The problem is the numbers displayed in the list contains an additional point other than the one already present.
When I checked in the database,it was correct ie same as that in the text file but the point gets added in the list control.Why?Whats the point?
The database fields are strings.
This problem occurs only to certain numbers in random.
I am confused.I need to use this in further calculations but it will harm my other calculations.
Help me.
And this,both the programs DONOT work simultaneously.The first was just a tool to help inputting thousands of numbers from text.
Thanx.
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Hi all,
What is Project->Setting->C/C++->Optimazation ?
I can see Maximize Speed ...
Is that for speed in executing my EXE file ?
I mean, if i choose that, my EXE file will running faster ?
So, this option is for my EXE speed ?
My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html
Hadi Rezaie
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yes, it's the speed of your exe...
A compiler man make different optimizations of your code. It can make your program run faster, make a smaller executable, and other stuff.
- Anders
Money talks, but all mine ever says is "Goodbye!"
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I am trying to make a program that will stream MP3s over a TCP/IP LAN, what would be the best way to set something like this up.
Thanks
-Matt Newman
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I am having a rather anoying problem with my CString's. Consider the following code:
CString strTest = _T("hello world");
ASSERT(strTest.Replace(_T("world"), _T("universe")) > 0)
ASSERT(strTest.Find(_T("world")) == -1)
Now, that the last ASSERT will always fail (indicating that "world" is present in the string). This can be verified by sticking an AfxMessageBox call in there too.
Why (or rather how) can this happen when the replace call always succeeds with one replacement. 
Cheers,
James Millson
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I think the culprit is your last ASSERT statement, CString's Find member returns -1, if the sub string was not found.
It should be:
ASSERT ( strTest.Find ( _T ( "world" ) ) != -1 )
-Ben
---------
On the topic of code with no error handling -- It's not poor coding, it's "optimistic" 
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