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Re: Disabling USB ports

softwaremonkey30-Mar-12 8:07

softwaremonkey

30-Mar-12 8:07

Thanks Michael, that was very useful. I found that if I set this to 4 (it was set to 3) it ignores usb memory sticks.

However, Windows still tries to install drivers when other USB devices are plugged in. Do you know if I can stop this happeining?

Thumbs Up | :thumbsup:

Re: Disabling USB ports

David Crow30-Mar-12 9:24

David Crow

30-Mar-12 9:24

softwaremonkey wrote:
Do you know if I can stop this happeining?

No. I can only point you to these:

http://support.microsoft.com/default.aspx?scid=kb;en-us;823732[^]

http://blogs.technet.com/b/danstolts/archive/2009/01/21/disable-adding-usb-drive-and-memory-sticks-via-group-policy-and-group-policy-preferences.aspx[^]

http://diaryproducts.net/about/operating_systems/windows/disable_usb_sticks[^]

http://www.interworks.com/blogs/arichardson/2010/01/13/disable-usb-memory-devices-not-usb-ports[^]

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Show me a community that obeys the Ten Commandments and I'll show you a less crowded prison system." - Anonymous

Passing std:: or boost::shared_ptr as a reference to a function

AlexZakharenko29-Mar-12 23:58

AlexZakharenko

29-Mar-12 23:58

I was suggested to replace in few places passing const shared_ptr by value to passing by reference (e.g. change const std::shared_ptr<t> param to const std::shared_ptr<t>& param) when I was checking my project with PVS-Studio, the static code analysis tool.

I understand that for performance hot-spots it might be a good optimization as creating a temporary copy of shared_ptr requires updating reference counter which is a interlocked operation.

So the question is - how safe is this optimization? Are there any cases when it could not be used?

Any thoughts on this would be appreciated.

Hermite Curve

002comp29-Mar-12 20:25

002comp

29-Mar-12 20:25

Hello Friends

I want to draw a hermite curve. I am having set of 2D points[x,y].

I googled also but didnt get the clear idea how can i draw a curve.
As Idea is about using two tangents and two points. But How do we can get tangents. And then can draw a curve.

If anybody use that,Please share with me any idea to explore it more.
I will be very thankful to you.

Regards
Yogesh

Re: Hermite Curve

Richard MacCutchan29-Mar-12 22:25

Richard MacCutchan

29-Mar-12 22:25

See here[^] for full details of the functions you need.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Hermite Curve

002comp29-Mar-12 22:37

002comp

29-Mar-12 22:37

Hello Sir
Thanks for the link but it doesnt provide any ifo about Hermite Curves.

Thanks
Yogesh

Re: Hermite Curve

Richard MacCutchan29-Mar-12 23:16

Richard MacCutchan

29-Mar-12 23:16

Drawing curves in Windows is the same whatever type of curve it is; it's just a matter of plotting the different points correctly. I leave the mathematics up to you.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: Hermite Curve

002comp30-Mar-12 1:28

002comp

30-Mar-12 1:28

Ok,Thanks.
I will go through it again.

Yogesh

DirectShow restart SetOneShot(true)

Stefan_L_0129-Mar-12 9:21

Stefan_L_01

29-Mar-12 9:21

HI
When i use SetOneShot(TRUE) and Run() in DS to capture one frame, i need to call StopWhenReady ()before i can capture again one image SetOneShot and Run.

Does anybody knows how i can keep one capturing one frame with SetOneShot without stopping the graph (just pausing) ? because restarting the stream is slow.

thx
Stefan

Chart Background

dryleh8729-Mar-12 4:02

dryleh87

29-Mar-12 4:02

Hello friends,

I'm trying to do an MDI application with the capability of draw math charts on the client screen. The problem is when i try to put a background in the screen, i mean, the axis for the graph. Is there a way to draw the axis and the chart in "differents" layers?

Thanks in advance.

Re: Chart Background

_Flaviu29-Mar-12 5:11

_Flaviu

29-Mar-12 5:11

Yes, is there a way to draw different layers on your view, but that is not quite simple .. why don't you inspire from here[^]

if you insist, I search for you a sample project with layers drawing ... just tell me ...

Re: Chart Background

dryleh8729-Mar-12 21:30

dryleh87

29-Mar-12 21:30

Thank you Flaviu2, I'll really appreciate if you can find an easy example, whereas I'm going to search in the links that you gave me.

Greetings.

Re: Chart Background

_Flaviu30-Mar-12 6:14

_Flaviu

30-Mar-12 6:14

See here[^] ... the demo application draw elements on view that have a layer structure ( one upside another ).

C++ insert error

_Flaviu29-Mar-12 2:48

_Flaviu

29-Mar-12 2:48

I usualy work with VC6 (MFC), and I have a good virtual tree code sample from here[^] but when I compiled with VC6 I get follow error on follow line :

C++

class CTVItemDataMMap
    :public std::multimap<LONG, CTVItemData>
    ,public CLockableCS
{
public:
	CTVItemDataMMap(){}

CTVItemDataMMap(CTVItemDataMMap& rhs)
{
	insert(rhs.begin(), rhs.end()); // <-- Here I got error
}

~CTVItemDataMMap(){}

};

typedef std::multimap<LONG, CTVItemData>& TVITEMDATA_MMAP_REF;

and compilator response is :

C++

TVItemDataMgr.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
TVItemDataMgrFolders.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
TVItemDataMgrPublic.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
TVItemDataMgrThreads.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
TVItemDataMgrTree.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
VirtualTree.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous
VirtualTreeDlg.cpp
d:\vc++\dlgbased\virtualtree\tvitemdata.h(105) : error C2664: 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,s
truct std::less<long>,class std::allocator<class CTVItemData> >::iterator __thiscall std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::insert(class std::_Tree<long,struct std::pair<long const ,cla
ss CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,class std::allocator<class CTVItemData> >::iterator,const struct std::pair<long const ,class CT
VItemData> &)' : cannot convert parameter 2 from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::le
ss<long>,class std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData> &'
        Reason: cannot convert from 'class std::_Tree<long,struct std::pair<long const ,class CTVItemData>,struct std::multimap<long,class CTVItemData,struct std::less<long>,class std::allocator<class CTVItemData> >::_Kfn,struct std::less<long>,clas
s std::allocator<class CTVItemData> >::iterator' to 'const struct std::pair<long const ,class CTVItemData>'
        No constructor could take the source type, or constructor overload resolution was ambiguous

maybe is small thing to do, can you help me ? I really need to this control, and I don't know how to solved ...
Should put here more information ?

Re: C++ insert error

Chris Meech29-Mar-12 6:22

Chris Meech

29-Mar-12 6:22

Is it possible that there is an insert method for the CLockableCS class that the compiler is resolving the call to?

Another thing is that VC6 wasn't exactly known for it's stellar support of the std:: classes. This could also be a versioning issue in that it's multimap class didn't support that particular set of parameters of an insert method call. You'd have to check the headers you are using to verify that. Smile | :)

Chris Meech
I am Canadian. [heard in a local bar]

In theory there is no difference between theory and practice. In practice there is. [Yogi Berra]

posting about Crystal Reports here is like discussing gay marriage on a catholic church’s website.[Nishant Sivakumar]

Re: C++ insert error

_Flaviu30-Mar-12 6:19

_Flaviu

30-Mar-12 6:19

I think that is header problem, because CLockableCS don't have insert method

C++

class CLockableCS
{
// Methods
public:
	// Ctor / Dtor
	inline CLockableCS() throw()	{ InitializeCriticalSection( &m_CS ); }
	inline ~CLockableCS() throw()	{ DeleteCriticalSection( &m_CS ); }

	// Lock / Unlock
	inline void Lock() throw()		{ EnterCriticalSection( &m_CS ); }
	inline void Unlock() throw()	{ LeaveCriticalSection( &m_CS ); }

// Attributes
private:
	CRITICAL_SECTION m_CS;		// Internal Critical Section
};

... instead, CTVItemDataMgr have insert method :

C++

HRESULT CTVItemDataMgr::InsertItem( LPCTSTR szName, const LONG lParentID, LONG& lNewID )
{   
   HRESULT hr = S_OK;

   try
   {
      CAutoLockT<CTVItemDataMMap> lock(&m_TVItemDataMMap);

      lNewID = GetNextID();
      m_TVItemDataMMap.insert(
			CTVItemDataMMap::value_type(lParentID, 
				CTVItemData(szName, lNewID, lParentID)));
   }
   catch(std::bad_alloc)
   {
      hr = E_OUTOFMEMORY;
   }

   return hr;
}

I mention that I have 2003 SDK installed ...

Re: C++ insert error

Chris Meech30-Mar-12 12:44

Chris Meech

30-Mar-12 12:44

Now you have me confused. Confused | :confused:

Is the error with

C++

insert()

or with

C++

insertitem()

Also where does the class CTVItemDataMgr fit into this problem. Your original post doesn't mention that.

Date / Time Class

Mike Certini28-Mar-12 17:29

Mike Certini

28-Mar-12 17:29

I need to find the best time class to use with a program that works with a date/time number in the following format: yyyy.mm.dd hh:mm:ss.ms. Essentially, I am reading values from a flat file (CSV) into a variable and then working with the variable. Does anyone out there know the best class to use? I have researched CFileTime and CTime classes. I do not know if functions within are the best for manipulating time. CTime has been ruled out because it does not accomodate milliseconds. Are there other classes I am not aware of? Lastly is there any references (links) showing how the functions are used.

The overall application involves exporting the applicable function through a DLL into an MQL4 script.

Re: Date / Time Class

Chandrasekharan P28-Mar-12 19:30

Chandrasekharan P

28-Mar-12 19:30

You need to make your own class for ms calculation. There is no ready made classes available for that.

Every new day is another chance to change your life.

Re: Date / Time Class

«_Superman_»28-Mar-12 19:40

«_Superman_»

28-Mar-12 19:40

The COleDateTime Class[^] should work for you.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Re: Date / Time Class

Code-o-mat28-Mar-12 21:42

Code-o-mat

28-Mar-12 21:42

Don't know if it is available to you or not or that if it can do what you need or not but check out boost::date_time[^], maybe it can help.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Re: Date / Time Class

jschell29-Mar-12 8:01

jschell

29-Mar-12 8:01

Mike Certini wrote:
need to find the best time class to use with a program that works with a
date/time number in the following format: yyyy.mm.dd hh:mm:ss.ms.

As a note...

That is a timestamp. Timestamps always have a timezone either implicitly or explicitly.

So one should always figure out what the timezone is and how it is defined.

Re: Date / Time Class

loveheronly29-Mar-12 16:53

loveheronly

29-Mar-12 16:53

time_t curr_time = time(NULL);
struct tm *pt = NULL;
pt = localtime(&curr_time);
char cTime[256],cTime1;
sprintf(cTime,"%04d.%02d.%02d%02d:%02d:%02d",pt->tm_year+1900, pt->tm_mon+1, pt->tm_mday,pt->tm_hour,pt->tm_min,pt->tm_sec);

Re: Date / Time Class

Mike Certini30-Mar-12 6:36

Mike Certini

30-Mar-12 6:36

loveheronly,

Excellent, thank you for your reply. Does the time_t container accomodate milliseconds?

Re: Date / Time Class

Mike Certini30-Mar-12 18:31

Mike Certini

30-Mar-12 18:31

After considerable research I have come up with the following solution which is 95% complete. I though cannot figure out how to report the milliseconds.

C++

#include <windows.h>

#using <mscorlib.dll>
using namespace System;
using namespace System::Globalization;
using System::String;

int main() 
	{
	// Assume the current culture is en-US.
	// The date is Feburary 16, 1992, 12 hours, 15 minutes and 12 seconds and 253 milliseconds.

	String* myDateTimeValue = S"02/16/1992 12:15:12.253";
	String* expectedFormats[] = {S"MM/dd/yyyy hh:mm:ss.FFF"};
	IFormatProvider* culture = new CultureInfo(S"en-US", true);
	DateTime myDateTime = DateTime::ParseExact(myDateTimeValue, expectedFormats, culture, DateTimeStyles::AssumeLocal);
	Console::WriteLine(S"1) myDateTime       = {0}", __box(myDateTime));

	system("pause");
	}

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