C / C++ / MFC

Re: How to convert Variant to AnsiString

20-Oct-09 0:25

just try API VariantChangeType [^]

Величие не Бога может быть недооценена.

manomimi20-Oct-09 0:54

manomimi

20-Oct-09 0:54

thanks
but when i use VariantChangeTypeit doesn't compile([BCC32 Error] test.cpp(7076): E2034 Impossible to convert 'const Variant *' to 'tagVARIANT *'
why?
OnEvent(const Variant &toto)
{
//I want to put the contained of toto in my string titi
VariantChangeType(&toto, &toto, VARIANT_NOUSEROVERRIDE, VT_BSTR);
AnsiString titi((wchar_t*)toto.bstrVal);
}

TerminateThread returns with ERROR_ALREADY_EXISTS!!

karthiksharmasg20-Oct-09 0:12

karthiksharmasg

20-Oct-09 0:12

hi all,
I came across an peculiar scenario and had to use TerminateThread inevitably (i hate TerminateThread and ExitThread). but when i call TerminateThread on my thread handle it returns error code 183 (ERROR_ALREADY_EXISTS) what is this means?

Re: TerminateThread returns with ERROR_ALREADY_EXISTS!!

Adam Roderick J20-Oct-09 0:18

Re: TerminateThread returns with ERROR_ALREADY_EXISTS!!

20-Oct-09 0:18

Whether you started the thread with AfxBeginThread?

Величие не Бога может быть недооценена.

karthiksharmasg20-Oct-09 0:39

karthiksharmasg

20-Oct-09 0:39

Nope, CreateThread.

Re: TerminateThread returns with ERROR_ALREADY_EXISTS!!

Cedric Moonen20-Oct-09 0:48

Cedric Moonen

20-Oct-09 0:48

karthiksharmasg wrote:
I came across an peculiar scenario and had to use TerminateThread inevitably

Could you please elaborate on that ? What was the reason why you were forced to use TerminateThread ?

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: TerminateThread returns with ERROR_ALREADY_EXISTS!!

karthiksharmasg20-Oct-09 1:09

karthiksharmasg

20-Oct-09 1:09

I have a application which will send data over a network, it is an blocking UDP socket, if sendto blocks in the thread their is no way for me to end that thread, so i am using TerminateThread, and i cant use Non-blocking socket due to design.

static library resource dialogs not working in linking applications

KASR119-Oct-09 22:47

Re: static library resource dialogs not working in linking applications

19-Oct-09 22:47

I have created a static library(Test.lib) and it has some resource dialogs and some classes say CMyDialog etc., .

Created a sample application(Test.exe) which links with static library(Test.lib).

Now I am creating a instance in my application and calling DoModal() did not work why?

CMyDialog mydlg;
mydlg.DoModal(); //No dialog shown

Adam Roderick J20-Oct-09 0:15

Re: static library resource dialogs not working in linking applications

20-Oct-09 0:15

I think your CDialog resource may not available to the client text.exe.
Since static library cannot contain the resource files, either you have add the resource file of the dialog in test.exe with the help of IDE
or create the dialog dynamically in the static library, whichever you like.

Величие не Бога может быть недооценена.

KASR120-Oct-09 0:49

Re: static library resource dialogs not working in linking applications

20-Oct-09 0:49

Actually the DoModal() call done inside the static library itself.
The test.exe calls a method written inside static lib which creates the dialog dynamically.

cmk20-Oct-09 5:47

cmk

20-Oct-09 5:47

You need to include the .rc from the static library in your .exe list of resource includes.

e.g.
Test.lib has TestLib.rc with all resources for static lib i.e. dialog template.

Test.exe:
- in VC++ goto resource view for project
- right-click on TestExe.rc
- select Resource Includes ...
- add #include "TestLib.rc" to Compile-time directives

Test.exe will now pull-in resources from Test.lib when built.

...cmk

The idea that I can be presented with a problem, set out to logically solve it with the tools at hand, and wind up with a program that could not be legally used because someone else followed the same logical steps some years ago and filed for a patent on it is horrifying.
- John Carmack

Re: static library resource dialogs not working in linking applications

KASR120-Oct-09 17:53

Re: static library resource dialogs not working in linking applications

20-Oct-09 17:53

Since the lib is used in many applications using .rc file in the static library is not correct way.

Adam Roderick J20-Oct-09 17:56

Re: static library resource dialogs not working in linking applications

20-Oct-09 17:56

Well you cannot include .rc in static lib. cmk too said to include in exe.
It is not possible
so as we suggested you can either create the dialog dynamically or include .rc file in exe.
These are the only options in front of you. Smile | :)

Величие не Бога может быть недооценена.

KASR120-Oct-09 18:09

Re: static library resource dialogs not working in linking applications

20-Oct-09 18:09

That fine.
Its not easy to create dialog dynamically as we have lots of dialogs(with so many controls in it) in the .rc file.

Adam Roderick J20-Oct-09 18:46

Eye detection using openCV in microsoft visual C++

20-Oct-09 18:46

Then you have include your .rc file to test.exe workspace.
Unfortunately you cannot add .rc in static lib, it wont work Roll eyes | :rolleyes:

Величие не Бога может быть недооценена.

fahira19-Oct-09 22:29

fahira

19-Oct-09 22:29

My project is to detect the eye from the face image.the project is similar with your project. Open cv is a new software for me.. Can I get a coding to detect the eye from the face image and show it in a form of square shape.I hope you can help me. I had loaded the face image.. and then I must detect the eye but i don't have the accurate coding to detect the eye. Can you help me to solve this problem??

Re: Eye detection using openCV in microsoft visual C++

Adam Roderick J19-Oct-09 23:54

Need help for CStdioFile.Read

19-Oct-09 23:54

Just refer Eye Detection[^]

Величие не Бога может быть недооценена.

Nicholas Amh19-Oct-09 21:13

Nicholas Amh

19-Oct-09 21:13

Hi all, can comeone help me with this? I am having error with it. Thanks alot

CStdioFile fp2(_T("C:/abc"), CFile::modeRead | CFile::shareExclusive);
CString fp2_rdtxt;
while (fp2.Read(fp2_rdtxt, fp2_rdtxt.GetLength()) != EOF)
{
fp2_rdtxt.Format("%lf %lf %lf\n", &a, &b, &c);
.........
.........
}
fp2.Close();

Richard MacCutchan19-Oct-09 21:59

Richard MacCutchan

19-Oct-09 21:59

Nicholas Amh wrote:
Hi all, can comeone help me with this? I am having error with it. Thanks alot

Well you don't explain what your error is and I'm not an expert in MFC, but I can guess from the code above that you are fairly new to this. The line

while (fp2.Read(fp2_rdtxt, fp2_rdtxt.GetLength()) != EOF)

uses the GetLength() method on fp2_rdtxt, but you have not initialised the variable so it has no length. Hence you will not be able to read data into it. The statement

fp2_rdtxt.Format("%lf %lf %lf\n", &a, &b, &c);

will also not work in my view.
I suggest you spend some more time with the documentation and learn the fundamentals of these classes and their methods.

Nicholas Amh19-Oct-09 22:21

Nicholas Amh

19-Oct-09 22:21

I am having error that shown below

Unhandled exception at 0x7c812afb in GUI2.exe: Microsoft C++ exception: CFileException at memory location 0x015ff79c..

fp2.Read(text, text.Getlength()) can't work

Richard MacCutchan19-Oct-09 22:52

Richard MacCutchan

19-Oct-09 22:52

Nicholas Amh wrote:
fp2.Read(text, text.Getlength()) can't work

That's what I previously explained to you. Please read the documentation and learn how to use variables, classes, their properties and methods.

theCPkid19-Oct-09 22:28

theCPkid

19-Oct-09 22:28

CStdioFile ipFile;

if(ipFile.Open(_T("C:\\abc.txt"), CFile::modeRead | CFile::shareExclusive | CFile::typeText) == 0)
{
    cout<<"unable to open file.";
    return 0;
}

CString str;

while( ipFile.ReadString(str) != NULL)
{
    cout<<str<<endl;
}

ipFile.Close();

This code works inside your project? no?