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::GetModuleFileName(GetModuleHandle(NULL), ...);
...cmk
Save the whales - collect the whole set
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Even though MFC's DllMain() is calling your app's InitInstance() method, can you not use GetProcess() or GetProcessId()?
"One must learn from the bite of the fire to leave it alone." - Native American Proverb
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Hi
I am trying to learn MFC and Visual C++ while working on a project. I want to do a simple task in a function.
It is when the function is called I need to spawn a separate thread, pop up a message box in that thread and when the user presses OK or Cancel in that message Box, kill the spawned thread and pass control back to the main thread.
I am clueless how to do this. A simple code example will really help.
Thanks a Ton..
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I could mail you a simple examlpe.
It popups message dialogs after a specified time span. Abortion is also included...
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Here is a useful link: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_mfc_afxbeginthread.asp
Try something like this to get you started:
INT MyThread( LPVOID ptr );
int main( int argc, char** argv )
{
CWinThread* T;
DWORD dwWait;
T = AfxBeginThread( MyThread, NULL );
dwWait = WaitForSingleObject( T->m_hThread, INFINITE );
return 0;
}
/* main() */
INT MyThread( LPVOID ptr )
{
AfxMessageBox( "Hello, world!" );
return 0;
}
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create a worker thread..
UINT ClassName ::Thread1(LPVOID lp)
{
ClassName *cn = (ClassName*)lp;
cn->Thread1();
}
//// define the functionality inside the thread
void ClassName::Thread1()
{
while(1)
{
AfxMessageBox("In thread");
Sleep(millisec);
}
}
in the function,
Anyfun()
{
CWinThread *cwt;
cwt=AfxBeginThread(Thread1,this);
}
you can suspend the thread by cwt->SuspendThread();
resume by cwt->ResumeThread();
ExitInstance() will delete it
Regards,
V
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to have a better look on a Thread... click on [View Thread] Below!!
jus fr fun,
V............v
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Vivekuniq wrote:
click on [View Thread] Below!!
I have Clicked [View Thread] and................... I got nothing............:->
"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
cheers,
Alok Gupta
VC Forum Q&A :- I/ IV
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This[^] article may help. Specifically, the section titled "Responding to user input while performing a long task".
/ravi
My new year's resolution: 2048 x 1536
Home | Music | Articles | Freeware | Trips
ravib(at)ravib(dot)com
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Thanks for all the help. I could accomplish what I wanted to do with all your help.
Thank Again
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The function call in the bold line always returns 0.
Isn't StretchBlt() able to transfer data between two memory DCs ?
CDC* ZoomBitmap(CBitmap* pBitmap, CWnd* pWindow)
{
// get source size
CSize srcSize = doGetSize(pBitmap);
// get destination size (client rect)
CSize dstSize = doGetZoomedSize(pBitmap, pWindow);
// create memory device contexts
CDC* pDC = pWindow->GetDC();
CDC* mem1 = new CDC; mem1->CreateCompatibleDC(pDC);
CDC* mem2 = new CDC; mem2->CreateCompatibleDC(pDC);
pWindow->ReleaseDC(pDC);
// select bitmap in original size
CBitmap* old = mem1->SelectObject(pBitmap);
// stretch bitmap
mem2->SetStretchBltMode(HALFTONE);
mem2->StretchBlt(0, 0, dstSize.cx, dstSize.cy, mem1, 0, 0, srcSize.cx, srcSize.cy, SRCCOPY);
// reselect old bitmap
mem1->SelectObject(old);
// delete temporary device context
delete mem1;
// use for future BitBlt() operations
return mem2;
}
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Thank you Chris,
I added
CBitmap* test = new CBitmap;
test->CreateCompatibleBitmap(mem2, dstSize.cx, dstSize.cy);
mem2->SelectObject(test);
and it seems to work.
I still have to fix some color stuff but this is finally the starting point I've been searching for.
Thanks a lot.
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1.)I have a data source that is continously modified, i.e items added, deleted, changed. I used a static global mutex object to actually allow only one thread to modify it. Now I have a list ctrl that shows that data, the refreshing is done in a different thread. Now in that thread:
DeleteAllItems();
for(unsigned int i=0; i<m_aryCall.Count(); i++)
{
..................................................
}
No what if I have a list of 10 elements and I deleted some of them when this thread is running. As the compiler will store the value of m_aryCall.Count() in some temporary variable and when its asks for 10th element, which is not there.
2.)In Modify Data Block a create a thread by new and run it, now the threads are running and the ModifyData is called many times when the previous threads is running. This actually creates memory leak as the thread is not deleting itself.
http://www.priyank.in/
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I am not sure I understand 100% of what you are trying to do, but it seems to me that you have a mumber of threads modifying the data (and using a Global Mutex to make sure they do it one at a time) and a number of threads reading the data.
If that is the case just use the same Mutex for the reading threads also. That way your data is not being modified as another thread is tryting to read it.
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Priyank Bolia wrote:
I used a static global mutex object to actually allow only one thread to modify it
The problem is, you like to directly modify the control from different threads...
You should only modify controls from the main thread (or the thread which created the control)... When you like to directly modify it from an other thread, it comes to unexpected situations like memory leaks or a deadlock of the app...
You should only modify the controls from different threads with the usage of PostMessage...
Communicate from the worker thread(s) with the main thread only with PostMessage and custom defined user messages to provide an save ui access...
like: http://www.codeproject.com/threads/usingworkerthreads.asp
Best regards 
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whatz the use of creating static methods??
class x
{
public :
int x;
x()
{
x=10;
}
static void mthod1()
{
cout<<x;
}
="" static="" void="" mthod2()
="" {
="" cout<<x;
="" }
}
void="" main()
{
="" x="" obj;
obj.mthod1();;---="">10
obj.mthod2();---->10
}
both r same..
what'd be the difference?? why its declared ststic?
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Hi,
you don't need an object.
Call x::mthod1();
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that means no need to initiate an object which'd waste (reserve)memory for all other datamembers and functions.. right?
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Yes, it can be really useful in a certain cases. Like for example the CTime object, to retrieve the current time:
CTime t = CTime::GetCurrentTime();
It is also used in the singleton pattern (pattern in which the constructor is private and the only way to obtain your object is through a static method).
Another use of static method inside classes is for callback functions: the statci method don't have an implicit 'this' parameter so it can be used for callback (not like normal member functions).
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Right. But within a static member function you can only address other static class members...
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this take all its sense in languages such as java, where all procedures are necesarilly a part of a class...
so, what to do when you need to call a global function (global by its behavior, but static member of a class by definition) from your code ?
2 choices :
- make an instance of the class that contain the method, then call the method on it... you, this way, have a variable which is allocated but from which you don't need anything...
- have the method static and call it without any instance of the class, just by the class name. this is typically done to put functions together into a logical group name (a namespace or a class). take the exemple of the java class Math ; it contains all the mathematic functions you can would have called, and some constants such as pi, e... all these are static
TOXCCT >>> GEII power
[toxcct][VisualCalc]
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thanks guys .. nice teachers are here!! 
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