SafeArrays (newbie) - ATL / WTL / STL Discussion Boards

krnathan31-May-04 3:06

31-May-04 3:06

Hi,

I was developing an ActiveX control that is to be embedded in IE. While trying to implement, I ran into this problem: I thought capturing the WM_DROPFILES message should be sufficient for providing drag and drop support of files (from file explorer) to the ActiveX control. While this works if the control is embedded in a thick client (say a VB form), it doesn't work when the control is embedded inside IE. IE's default handling of dropped files kicks in and it tries to open the file!

I tried to look for help from the usual sources (MSDN, google etc) but most of them deal with MFC drag and drop support while I am using ATL and can't use any of those. Any help here would be greatly appreciated!

Thanks,
KR Nathan

Re: Drag and drop of files in ATL

f6431-May-04 8:36

f64

31-May-04 8:36

Hi To have drop capabilities, a control must implement IDropTarget interface and regiter itself as a drop target using the RegisterDragDrop function.

Fabian

Re: Drag and drop of files in ATL

krnathan2-Jun-04 23:32

krnathan

2-Jun-04 23:32

Thanks for this info. However, looking at the IDropTarget, it looks like much more sophisticated than what I require. When files are dragged from explorer and dropped, I just need to know the filenames of the dropped files so that I can show them in a list inside my control. WM_DROPFILES does exactly same but doesn't seem to be working when the control is placed inside IE.

Thanks for your help.

Adding a component to a MFCEXE!

alireza_shokoie30-May-04 4:10

alireza_shokoie

30-May-04 4:10

Hi,

I have created a ATL component in a MFC application with Add Class wizard. Now i will instantiate an object from this component in a thread, and i have included component header file in that thread's .cpp file however the compiler generate error for unknown IID and i do not know which file must be included that solve my problem?

Alireza

about ATL

mf1429-May-04 20:21

mf14

29-May-04 20:21

Hi
I am a beginer VC++ programmer. I have a question:
What is ATL and how can use its.

Are you know the meaning of "MARZOGH"?
If YES,Please send for me.

installscript

raysuman28-May-04 3:32

raysuman

28-May-04 3:32

i am in need of a good tutorial on installscript,working with scripts,extensibility, custom dialogs for working on
dev studio 9 on a installshield project.

But on web it seems no good tutorials are available.everything points to books from installshield.com

Advise.

Thanks

Suman ray

autentification

JuanCri28-May-04 3:31

JuanCri

28-May-04 3:31

I need to be autentificated by a server before I can download a file from this site. I dont know how.

The server adress that auentificate me is like this:
http://www.xxxx.com/user=xx&psw=xx
when my browser gets to this url is redirected to other page that give me the links to the files I want to downlaod.

Im trying to use the method URLDownloadToFile to get this files, but I need to autentificate my self first and I dont know how, can some body help me plz tks.

Hmmm | :|

SafeArrays (newbie)

De Nardis Andrea27-May-04 5:45

De Nardis Andrea

27-May-04 5:45

Hi all,
I have to pass a safearray to my DLL COM server. the method must size the array, and then fill with data. After that the client must use the data the server has inserted. I suspect my passed array is a copy of the one sent by the VB client, so my VB client does not access the data. how I have to modify my MIDL lines in order to have the safearray shared?
I am using:

[id(1), helpstring("method GetPosition")] HRESULT GetPosition(VARIANT arrayPosition);

arrayPosition is a vector of double like this:

Dim arrayPosition as Double (0 to 9)
Dim a As New RunTimeAx
a.GetPosition arrayPosition
Debug.Print arrayPosition (0)
Debug.Print arrayPosition (1)
Debug.Print arrayPosition (2)
Debug.Print arrayPosition (3)

Could you pls help me?
Thanx in advance

Re: SafeArrays (newbie)

Mike Dimmick28-May-04 9:50

Mike Dimmick

28-May-04 9:50

You probably want

HRESULT GetPosition([in, out] VARIANT* pArrayPosition);

or even, if the caller won't ever pass anything interesting in:

HRESULT GetPosition([out, retval] VARIANT* pArrayPosition);

In the second case, you would transform your VB code to

Dim arrayPosition As Variant
Dim a As New RunTimeAx
arrayPosition = a.GetPosition
Debug.Print arrayPosition (0)
' etc

(You might need to use Set, I haven't used VB for a while).

Stability. What an interesting concept. -- Chris Maunder

Re: SafeArrays (newbie)

De Nardis Andrea29-May-04 1:29

De Nardis Andrea

29-May-04 1:29

Thanx a lot Mike,
when you come in Italy I'll offer you a beer.
Thanx again. Wink | ;)

C# to VC++

Prakash Nadar27-May-04 5:13

Prakash Nadar

27-May-04 5:13

Consider the following code.

Consider the following code

byte[] message = new byte[40];
message[4] = (byte)'S';
message[5] = (byte)'S';
message[6] = (byte)'T';
message[7] = (byte)'A';
message[8] = (byte)'R';
message[9] = (byte)'T';
message[10] = (byte)'C';
message[11] = (byte)'S';
int retval = myStream1.Write(message);

This code is a C# code myStream1 is an object of a COM component, What would be equivalent code in VC++,
Byte seems like cannot be a bstr datatype in VC++.

I'll write a suicide note on a hundred dollar bill - Dire Straits

Re: C# to VC++

Jörgen Sigvardsson27-May-04 20:30

Jörgen Sigvardsson

27-May-04 20:30

int retval;<br />
HRESULT hr = myStream->Write(CComBSTR(L"SSTARTCS"), &retval);

or
hr = myStream->Write(_bstr_t(L"SSTARTCS"), &retval); depending on if you are using ATL or MFC prior to VS.NET/ATL7 (CComBSTR was an exclusive ATL thing in ATL3).

Mr.Prakash wrote:
Byte seems like cannot be a bstr datatype in VC++.

I'm not a .NET rocket scientist, but you are doing to that poor COM object seems to be dangerous. A BSTR string is a length descriptor followed by a sequence of characters. I thought .NET marshalled .NET strings as BSTR strings automatically between .NET and COM...? Why not just stuff an ordinary string into Write()?

--
Booohoo!

Re: C# to VC++

Prakash Nadar27-May-04 23:24

Prakash Nadar

27-May-04 23:24

Click[^]

I figured out that byte[] array from C# is not a BSTR in COM.

No i am not even a Car scientist of C#

Link error ???? (neophite)

De Nardis Andrea26-May-04 23:48

De Nardis Andrea

26-May-04 23:48

Hi all,
I made my first ATL w/ Visual C++ 6.0 project and it (almost) perfectly works in Debug Config, when I try to compile in Release MinDependecy I get the following link error:
inking...
Creating library ReleaseMinDependency/cnitfc.lib and object ReleaseMinDependency/cnitfc.exp
LIBCMT.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
ReleaseMinDependency/cnitfc.dll : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

What's goin'on?
Please help me.
thanx a lot.
Regards,
Andrea Smile | :)

Re: Link error ???? (neophite)

Stuart Dootson27-May-04 3:19

Stuart Dootson

27-May-04 3:19

Remove '_ATL_MIN_CRT' from the list of pre-processor defines. You've used part of the C run-time library that pulls in the initialisation part of the library. This looks for _main, which isn't defined if _ATL_MIN_CRT is defined.

HTH

Stuart Dootson

'Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p'

Re: Link error ???? (neophite)

De Nardis Andrea27-May-04 4:09

De Nardis Andrea

27-May-04 4:09

Thanx a lot. Really.

Feature of STL map

ra_sasi26-May-04 9:33

ra_sasi

26-May-04 9:33

Hi,
In IBM open class library,we have a class called IKeySet which has to be replaced by map in STL as per IBM migration guide.But in eh IKeySet we have a provision to add an elelemnt with key as well as an element.(this feature it inherited from ICollection class which is equivalent to list or deque in STL). I am trying in vain to have this type with map also but dint succeed.

Can you guys give some idea as how to implement this.That would pull me out of this soup..

Thanks
Sasi

Re: Feature of STL map

valikac26-May-04 13:23

valikac

26-May-04 13:23

Explain what you meant by "add an elelemnt with key as well as an element."

Kuphryn

Re: Feature of STL map

rsasi26-May-04 17:07

rsasi

26-May-04 17:07

Infact IKeyset inherited the feautures of ICollection( which is like list) and IAKeySet(its like map).SO we can add the elements of both with key (like in map)as well as just the element(liek in list). Hope this will suffice.Please look at the code below

#include <iostream>
#include
#include <deque>
#include <utility>
#include <string>
using namespace std;

typedef const string& CIR;
typedef enum { IEArgString, IEArgNumber, IEArgSpecial } IEArgType;

class IEArg {

public:
//* Element name and value and embedded datatype.
string name;
string value;
IEArgType dataType;

//* Default constructor given name and value.
IEArg(CIR n, CIR v) : name(n), value(v) { dataType = IEArgString; }
IEArg(CIR n, CIR v, IEArgType t) : name(n), value(v), dataType(t) { }
friend bool operator<(const IEArg& lhs, const IEArg& rhs);
};

inline bool operator<(const IEArg& lhs, const IEArg& rhs)
{
if (lhs.name == rhs.name && lhs.value == rhs.value)
return FALSE;
else
return TRUE;
}

typedef map<string,iearg> IEArgList;
inline CIR key(const IEArg& iea) { return iea.name; }

typedef deque < IEArg > IEOArgList;

typedef deque < IEOArgList > SUMMARY;

main()
{
int days=10;
IEArgList al;
string where;
string nam="1235";
string val="12";

// Maps and multimaps deal with pairs
typedef pair<string,iearg> entry;

entry p0("Time",IEArg("1100","A"));
entry p1("Time",IEArg("1234","A"));

entry p2("Transaction",IEArg("4567","D"));
entry p4("xransaction",IEArg("2345","B"));

entry p3("ResultCode",IEArg("5678","C"));

al.insert(p0);
al.insert(p1);
al.insert(p2);
al.insert(p4);
al.insert(p3);

/********
I want add just IEArgList just liek a collection with out key

********/

IEArgList::iterator iter;

for (iter = al.begin(); iter != al.end(); iter++) {
cout<<"values are:"<<(*iter).first<<":"<<(*iter).second.value<<":"<<(*iter).second.name<

Re: Feature of STL map

valikac27-May-04 5:09

valikac

27-May-04 5:09

Essentially, you want to store an into sorted container, correct? In your example, you are storing it inside a map and requires key/value. One solution is a set.

Kuphryn

Re: Feature of STL map

Paul Ranson27-May-04 12:48

Paul Ranson

27-May-04 12:48

I can't understand what your code is supposed to be doing. Why not describe your basic data structures and what this collection is supposed to be used for? You obviously cannot make a map or a set of a type and then store things that are not actually instances of that type in the map or set.

FWIW when you reply with code if you check the little box after the text box it will display the template definitions directly and not require us to 'view source' and generally mess about.

Paul

ListView 2000 - XP CPU Usage

Dan Hill26-May-04 6:11

Dan Hill

26-May-04 6:11

CPU usage increases for list view for same app under XP
-------------------------------------------------------

I've been working on an application for several years which uses MS ListView controls to display large grids of data (perhaps 50 lines by 100 columns).

background: The application displays market data, amongst other things, from electronic exchanges.

The application updates individual cells relatively rapidly.

I handled the CustomDraw events to provide formatting such as colors.

The list view is in virtual mode.

All was well on Win2000. CPU usage was reasonable. However, when I open the same window under XP, the CPU usage seems to increase dramatically.

I used the ATLControls.h list view wrapper as a thin wrapper around the control, and compiled under VC6, SP5.

Does anyone have any clues?

Thanks in advance
Dan Hill

Re: ListView 2000 - XP CPU Usage

Dan Hill26-May-04 6:12

Dan Hill

26-May-04 6:12

PS Am also using WTL MDI wrappers

error C2872: 'ATL' : ambiguous symbol in conversion from wtl7.0 to 7.1

bryces25-May-04 1:20

bryces

25-May-04 1:20

Hi All,

I have been going through one of my older projects and updating it from WTL 7.0 to 7.1 and am getting error which I have no idea how to fix.

I have search through the forum and have found no-one else has had this problem... or the problem is so easy that I cannot see the solution.

All I have done is changed the path to my wtl 7.0 include to now point to the 7.1 includes. I then rebuild my app and get the following error

C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(396) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(397) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(595) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(599) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(600) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(603) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlapp.h(844) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(39) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(39) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(57) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(82) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(205) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atluser.h(490) : see reference to class template instantiation 'WTL::CMenuT<t_bmanaged>' being compiled
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlgdi.h(78) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlgdi.h(86) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlgdi.h(88) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlgdi.h(528) : error C2872: 'ATL' : ambiguous symbol
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlgdi.h(682) : see reference to class template instantiation 'WTL::CBitmapT<t_bmanaged>' being compiled
C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\VC98\WTL71\INCLUDE\atlframe.h(380) : error C2872: 'ATL' : ambiguous symbol

.... and it keeps on going

I am using visual c++ 6.0

ANy ideas on why this is happening?

cheers
Bryce

When ShowUI Function is called?

Abhi Lahare24-May-04 19:25

Abhi Lahare

24-May-04 19:25

Hi all

I have implemented IDochostUIHandler for my HTML control hosting. The container for the HTML control is IE. now i want to handle events from top level menu such as FILE/Edit. what interfaces i need to add to acheive the same.

BTW i looked into msdn for the same, it says
////MSDN////
IDocHostUIHandler::ShowUI Method
Called by MSHTML to enable the host to replace MSHTML menus and toolbars
/////

My question is When these function is called and who calls it?

thanks in Advance
Abhishake

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