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I have C++ libraries which i want to use in C application.
Please help.
Lata Agrawal
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hi,
I have a set of avi files how I can I read one avi and write the video and audio assoiated with that avi to another new avi(to be created).
and also let me know how to join to avi,s in c++(vc++/borland c++)
regards
shaan
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DirectShow has a number of APIs desined specifically for this purpose.
You'll find that it's not really a simple, intuitive process, though.
If you can locate the SDK tools that come with the DirectX SDK, there should be one known as: GraphEdit.exe
Using DirectShow[^]
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How does one go about playing an audio file in C++? Is there any way to use mp3's?
Candz
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http://www.codeproject.com/audio/mp3player.asp
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what about more advanced features? e.g. how do you continuously play a file? I found mciSendCommand(), but cannot work out the device id (i am not a multimedia programmer thus not familiar with these stuff  )
with wav file functions, you can ask the system to play the sound in a loop...
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If you just want to play a simple wav file, try ::PlaySound(...). very simple
include file:
<mmsystem.h>
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I was just playing around with the VC++ Express, mixing up template code and managed classes. I wasn't able to figure out how to write a template class (managed or unmanaged) that can work with both managed and unmanaged classes. Is it even possible?
There are obvious syntactic differences, for eg, it's T * for unmanaged and T ^ for managed classes.. I tried specializing the template for managed classes, but then couldn't figure out how.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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managed C++ probably uses the .NET framework for templates. and they can't be specialised.
Christian Graus - Microsoft MVP - C++
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But aren't templates compile time thingies? I guess they only need to be supported by the compiler and no runtime support is required. Generics, yes, but templates, I don't think so.
What I wanted to do is to write a template class that can take both managed and unmanaged types as type parameters. Is there any other way it can be done?
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Sorry - I guess I misunderstood you.
Christian Graus - Microsoft MVP - C++
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You'll need partial template specialization for this to work. Ie:
#include <vcclr.h>
using namespace System;
template <typename T> class TestClass
{
T member;
public:
TestClass (T mem) : member (mem){}
};
template <typename T> class TestClass<T^>
{
gcroot<T^> member;
public:
TestClass (T^ mem) : member (mem){}
};
int main(array<System::String ^> ^args)
{
TestClass<String^> tc(gcnew System::String(L"something")); //managed
TestClass<int> tn(1); //native
return 0;
}
<hr>
<a href = http://www.codeproject.com/script/profile/whos_who.asp?id=14112#Blog> My programming blahblahblah blog</a>. If you ever find anything useful here, please let me know to remove it.
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Oooh ok. I did try partial specialization, but I didn't get the syntax for specializing for managed classes (T^). I guess the syntax is the same as for specializing for T*.
Thanks a lot.
Regards
Senthil
_____________________________
My Blog | My Articles | WinMacro
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Dear fellow CPians,
I am perplexed as to what's the fuss about a trivial phrase like 'Initialisation is Resource Acquisition'. I would be grateful if some kind enlightened soul could shed some light on it. What does it signify?
SDX-{5A853460-2944-42f8-84B8-2432DE3657EF}
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Guys thanks a lot for the pointers. Its not a big deal after all, only the obvious restated as jargon.
SDX-{5A853460-2944-42f8-84B8-2432DE3657EF}
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I'm using visual C++ .NET, and I'd like to make an ActiveX control for on a website, but I fail to find how to do it.. Sure you have many sites on how to us vb.NET and C# into a control for a website (such as, say; windows update), but I can't find a *manual* that says how to do it in vc++ .NET.
I know it's something with making an assembly, but.. that's all i have now.. an empry assembly..
Any help is much appreciated,
Michael
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It's actually alot easier than you would suspect.
There is a utility that is included with the .NET Framework SDK, called:
AxImp.exe
This converts your ActiveX control into a .NET assembly.
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Sounds pretty simple, you just need a nested loop.
Christian Graus - Microsoft MVP - C++
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If both arrays are same size, then you can just put them into a
for(i=0;i<length;i++)
snprintf(newarray, maxlen, "%s/%s", oldarray[0][i], oldarray[1][i]);
Otherwise, as Christian says, a nested loop.
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Hi all,
I've got an application where a window (parent) opens a child window. How do I ensure that only one of these windows (child) can be open at any time????
Thanks all
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The problem now is that I need to check whether the form is open and if so bring it to the front when required. I can do this ok but when I've closed the from it won't reopen until an application restart.
Any ideas anyone???
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I've got some C++ classes doing some math and I want to use them in windows forms app.
I add for example file.cpp and file.h to project
////////////////////////////////////////////////////////////////////////
file.h
class Test1
{
public:
Test1();
~Test1();
...etc
};
file.cpp
Test1::Test1()
{
etc...
}
...etc...
////////////////////////////////////////////////////////////////////////
then add some button to windows form for instance:
private: System::Void button1_Click(System::Object * sender, System::EventArgs * e)
{
Test1 *pp;
pp = new Test1; //err no default constructor
pp->func();
}
and then comes a lot of errors for this Test1 class allocation?
9ine
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