Discussions - microsoft.public.vc.language

	RegOpenKeyEx failure
	Hi Experts: I'm writing a console app which accesses and changes some values under Windows registry: HKLM\System\CurrentControlSet\ Enum and I'm the admin on the machine (XP). I have done the following steps but failed at step #4 with access denied error. 1. Get the process handle with PROCESS_ALL_ACCESS; success.... more » By Polaris - Nov 22 - 4 new of 4 messages

	will global variable for class type be initialized at declaration?
	hi, if i have a local variable as A a; in a class. I declare it in header and define/intialize it in the cpp file, normally. If I declare it as a global variable in my project, will that be initialized at the point of declaraion? thanks By Chris - Nov 20 - 10 new of 10 messages

How to detect active Ethernet link

Hi, I am using embedded Visual C++ on WinCE with Winsock API calls and want to detect if my Ethernet card is connected to a switch or not without actually making a connection to another socket. A bit like how your computer 'knows' when connected to a switch, without actually requiring DHCP, etc. (just plug in an RJ45 and the on-board link light... more »

By mgOn10To100 - Nov 19 - 2 new of 2 messages

	Does the compiler generate better code for references than pointers?
	Subject says it all Using VS2005 Does the compiler generate better code for references than pointers? I half think so (because it does not have to worry about NULL) but would interested in any links confirming this. Thanks Stephen Howe By Stephen Howe - Nov 19 - 3 new of 3 messages

	Using GUID as the key for std::map
	I've a map which uses GUID as the key. ...void main() { std::map<GUID, std::string> map; GUID d1; std::string szName = "test"; map[d1] = szName; ...But when compiling this code in VS2008 shows following errors c:\program files\microsoft visual studio 9.0\vc\include\functional (143) : error C2784: 'bool std::operator <(const... more » By Faisal - Nov 19 - 7 new of 7 messages

	Not finding help for standard C functions
	This may not be the appropriate place to ask this but I'll give it a try. I have Visual Studio 2008 installed and when I try to look up a standard C function I do not find help for this. It seems to me that on earlier versions of Visual Studio I was able to find such help. Does anyone have a clue as to what my problem is?... more » By Chris Saunders - Nov 19 - 6 new of 6 messages

	inlining of functions returning an unwindable object -- rationale?
	Greetings. The Visual Studio compiler will never inline a funtion that returns an unwindable object (e.g. std::string, CString, etc.) (See documentation of the inline and __forceinline keyword and the doc for C4714: [link] , [link]... more » By Martin B. - Nov 19 - 3 new of 3 messages

	How to debug a dll?
	...This suggests strongly that the code in fact never gets run. Debug it to figure out why. By Igor Tandetnik - Nov 18 - 10 new of 10 messages

	Generic String Conversion Question
	Hi vc gurus, template<typename ValueType> std::string ConvertToString(ValueType value) { std::stringstream ss; ss << value; return ss.str(); ...With the above code snippet, I am able to use str = ConvertToString<DWORD>(temp1); to obtain a decent string for DWORD numbers. But it did not succeed with floats... more » By Jack - Nov 18 - 7 new of 7 messages

	C++ Exception and Copy Constructor requirement
	Hi, I know the C++ standard demands that when one throws an exception by value a temporary copy of the exception object is being made and this temporary object is passed to the catch site. The copy is made by the static type's copy constructor. I am fine with that. However, the following experiments with VC2003, VC2005 and VC2008 produces... more » By Leon - Nov 17 - 6 new of 6 messages