ATL / WTL / STL

Re: How To Add a Dll TO MFC Application in visual Studio

18-Oct-17 1:18

But are you sure that the value you are sending to the function is correct?

Jochen Arndt18-Oct-17 1:40

Jochen Arndt

18-Oct-17 1:40

Have you used the Dependency Walker or dumpbin meanwhile?

The exported names may be mangled (see Name mangling - Wikipedia[^] ). Then you have to pass the mangled name to GetProcAddress.

Re: How To Add a Dll TO MFC Application in visual Studio

Michael Haephrati22-Oct-17 2:22

Michael Haephrati

22-Oct-17 2:22

This article explains it. Basically you use LoadLibrary with the DLL's path given to it. The rest is mapping the functions you will need to call.

- Michael Haephrati מיכאל האפרתי

using /clr switch for ATL application raises an exception when the application is terminating.

Vijjuuu.23-Aug-17 0:00

Vijjuuu.

23-Aug-17 0:00

Hi,

i have created a sample ATL application in VS2010, added ATL Simple object.

it has only one method

int getVal()
{
return 10;
}

i have enabled /clr switch in the project properties and build in release mode. (i have added /clr because i want to consume some objects build in C#.net)

after registering the dll, i have consumed the COM object in vbscript. (the code below)

dim obj
set obj = createobject("MySample.COMSample")
msgbox obj.getVal()
set obj = nothing

this is very simple COM object. if i run the above script, it will show message box "10".
once i press ok, there is an popup with an exception message below.

---------------------------
WScript.exe - Application Error
---------------------------
The exception unknown software exception (0xc0020001) occurred in the application at location 0x7c812aeb.

Click on OK to terminate the program
---------------------------
OK
---------------------------

if i remove /clr switch and build it run the Vbscirpt. i don't see the popup error.

any suggestion why there an exception when /clr switch is used ?

Thanks in advance.

modified 23-Aug-17 6:26am.

GetUsbDrive letter error

Member 101933363-Aug-17 0:27

Member 10193336

3-Aug-17 0:27

I m using VC++ VS2008 compact edition. I hv problem that
when I m using

GetUsbDriveLetter(CString)

at compiled time error occurred not defined because it is in

Quote:
winbase.h

sdk function. And CE7 hv different sdk therefore it occurred. please suggest me how to get USB letter in CE7

YogeshJadhav

Richard MacCutchan3-Aug-17 1:18

3-Aug-17 1:18

I cannot find that function in the latest version of winbase.h, and MSDN does not seem to have heard of it. What version of the SDK do you have that includes it?

Member 101933363-Aug-17 2:26

Member 10193336

3-Aug-17 2:26

actual error is

Error	294	error C3861: 'GetLogicalDriveStrings': identifier not found

and using Toradex_CE700 platform using VC++

Microsoft Visual Studio 2008
Version 9.0.30729.1 SP
Microsoft .NET Framework
Version 3.5 SP1

Installed Edition: Professional

Microsoft Visual C++ 2008   91605-130-0752752-60490
Microsoft Visual C++ 2008

Crystal Reports    AAJ60-G0MSA4K-68000CF
Crystal Reports Basic for Visual Studio 2008


Hotfix for Microsoft Visual Studio 2008 Professional Edition - ENU (KB2483802)   KB2483802
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Richard MacCutchan3-Aug-17 2:28

3-Aug-17 2:28

No mention of Windows CE in GetLogicalDriveStrings function (Windows)[^].

Member 101933363-Aug-17 2:36

Member 10193336

3-Aug-17 2:36

yes, then any function to get usb drive letter in Windows CE 700 api

Richard MacCutchan3-Aug-17 2:37

3-Aug-17 2:37

See my other reply below; it seems that Windows CE does not use drive letters.

Richard MacCutchan3-Aug-17 2:32

Use ATL COM DLL in VB Script which written in C++

3-Aug-17 2:32

See File Systems (Windows CE 5.0)[^]

GTAVLover11-Jul-17 15:03

GTAVLover

11-Jul-17 15:03

Hello, I am newbie to C++ and therefore I found the following example and working with it.

A Beginner Tutorial for Writing Simple COM/ATL DLL For VS2012

I like to know how to use this example COM object in VB Script, I like to do it using CreateObject Method.

If it currently doesn't support VB Script, how can I add VB Script support to this DLL?

Thanks for your help. Thumbs Up | :thumbsup:

Re: Use ATL COM DLL in VB Script which written in C++

Richard MacCutchan11-Jul-17 21:35

Re: Use ATL COM DLL in VB Script which written in C++

11-Jul-17 21:35

See Using COM Objects in Windows Script Host (COM)[^].

GTAVLover11-Jul-17 22:02

GTAVLover

11-Jul-17 22:02

Thanks, I did it but I got "Could not locate automation class..." in VB Script, but using C# this works fine.

I used it like

Dim Test: Set Test = WScript.CreateObject("SimpleATLComLib.SimpleCom")

Test.TotalMarks = 50

because I don't know how to get automation class name to be used in VB Script from that DLL.

Why this error occurs?

Re: Use ATL COM DLL in VB Script which written in C++

Richard MacCutchan11-Jul-17 22:06

Get struct-members' names in Visual Studio console application?

11-Jul-17 22:06

Sorry, no idea, I have not used VBScript in this way.

arnold_w25-Mar-17 0:11

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 0:11

I need to debug an embedded C-application that contains a lot of the following structs:

MyStruct.MySubStruct.MyEnum

I have ported the code into a Visual Studio 2005 console application and I would like to dump all the struct-members (several hundred in total) to a text-file like this:

MyStruct.MySubStruct.MyEnum = MyEnumValue

I know this isn't possible in pure Visual Studio c programming language, but aren't you allowed to include C++ files as well in a Visual Studio console project? If so, is C++ capable of converting struct members and enums into text strings?

Richard MacCutchan25-Mar-17 0:35

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 0:35

arnold_w wrote:
pure Visual Studio c programming language

There is no such thing.

And your code above does not make clear what the problem is in sending the struct contents to a text file. Generally speaking you need to write the code to dump each element of the struct. Or you could just run the program in the Visual Studio debugger and examine the fields that way.

arnold_w25-Mar-17 0:58

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 0:58

Just like

__FILE__

generates a string with file name and

__LINE__

generates a string with the line number, I would like to have some way of generating strings with the structs' and members' names.

Richard MacCutchan25-Mar-17 1:01

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 1:01

Those are compiler defined values, and have nothing to do with your question.

arnold_w25-Mar-17 1:33

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 1:33

I guess I could use the Visual Studio debugger and use OCR (optical character recognition) on the watch window. Can anybody recommend a good, free OCR application?

Richard MacCutchan25-Mar-17 1:42

Re: Get struct-members' names in Visual Studio console application?

25-Mar-17 1:42

arnold_w wrote:
OCR (optical character recognition) on the watch window

I'd like to see that work.

Richard Andrew x6425-Mar-17 1:01

Richard Andrew x64

25-Mar-17 1:01

The C and C++ runtime environments do not maintain metadata on the types in your program the way a .NET executable does.

Therefore, I don't see how you would dump the type names, unless you develop a program to process your source code and extract the information that way.

If I'm wrong about this, I invite correction.

The difficult we do right away...
...the impossible takes slightly longer.

Re: Get struct-members' names in Visual Studio console application?

Randor 21-Apr-17 17:40

Randor

21-Apr-17 17:40

Hi,

Yes, I had to do this many years ago.

However you are not really giving me enough information. You need to be very specific when you ask for help. Do you need to do this on a Release build or Debug build? Do you need to do this at run-time or compile-time?

1.) Preprocessor abuse[^] that stores the variable name in an extra char field in the struct. Here is a partial example[^].
2.) If you are using C++ there are several boost libs[^] that allow you to implement some reflection.
3.) The Debug Interface Access SDK[^] can be used to get all of the structs and member variable names. If you go this route... you will need to generate a PDB.

Best Wishes,
-David Delaune

Re: Get struct-members' names in Visual Studio console application?

arnold_w21-Apr-17 22:55