Drag and drop of files in ATL - ATL / WTL / STL Discussion Boards

roel_1-Jun-04 5:01

1-Jun-04 5:01

Hi,

I'm writing my first ATL control that will be used inside an HTML page. I used the project wizard to create a simple control, I build it and tested it in the ActiveX test container. Now I want to start making my own changes and stepping through the code a bit to see how it works. How can I test a control and set breakpoints in the Visual Studio debugger so that it stops at that point, just like a 'normal' program? Thanks.

Re: Debugging ATL control

roel_1-Jun-04 5:15

roel_

1-Jun-04 5:15

Never mind, I found it (found an article on how to debug a service, it's the same for an activex control): Tools->Debug processes, attach to tstcon32 process.

Re: Debugging ATL control

Jörgen Sigvardsson1-Jun-04 8:49

Jörgen Sigvardsson

1-Jun-04 8:49

You can also for a break point using __asm int 3. That'll halt the program and show you the "program has crashed dialog, do you wish to debug?"-dialog. From there you can attach to the program which embeds your control.

--
Booohoo!

Re: Debugging ATL control

roel_2-Jun-04 4:26

roel_

2-Jun-04 4:26

Aha, I didn't know I could do that from an ActiveX control as well. Thanks!

Re: Debugging ATL control

_Magnus_2-Jun-04 2:05

_Magnus_

2-Jun-04 2:05

Or set the tstcon32 as the executable for the debugsession.

/Magnus

- I don't necessarily agree with everything I say

Re: Debugging ATL control

roel_2-Jun-04 4:27

roel_

2-Jun-04 4:27

It keeps getting better Wink | ;)

Thanks!

ATL Executable doesn't allow MFC support, why ?

ohadp1-Jun-04 1:21

ohadp

1-Jun-04 1:21

I have an MFC Extension-DLL which includse various controls I'd like to use in various places.

When I use it in MFC applications it works.
When I use it in ATL-Dlls it works, the wizard replaces several core methods in the Dll (DllCanUnload, etc) create a CWinApp object and all is well.

It seems like I can't use my beloved MFC-Extension-DLL in an ATL Executable project.

Excerpt:
Executable (EXE)
Select to create a local out-of-process server. This option does not allow support for MFC or COM+ 1.0. It does not allow for the merging of proxy/stub code.

Why is this ?
Is there a way to get pass this limitation ?

Drag and drop of files in ATL

krnathan31-May-04 3:06

krnathan

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

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