Managed C++/CLI

Convert String to LPSTR ?

9-Oct-05 21:36

You can use an array of characer variables to store the large number.

Phernando6-Oct-05 6:53

Phernando

6-Oct-05 6:53

I'm trying to interface a DLL parameter with .Net String variable.
How do I convert the .net String type to LPSTR used on DLL parameter ?

Like this:
LPSTR sUser = this->edtUser->ToString();

but this cause the following error :
error C2440: 'initializing' : cannot convert from 'System::String __gc *' to 'LPSTR'

Mad | :mad:

Fernando Oliveira

Re: Convert String to LPSTR ?

Sheng Jiang 蒋晟7-Oct-05 12:56

Sheng Jiang 蒋晟

7-Oct-05 12:56

http://msdn2.microsoft.com/library/22e4dash(en-us,vs.80).aspx[^]

http://blog.joycode.com/jiangsheng
http://blog.csdn.net/jiangsheng
Command what is yours
Conquer what is not
---Kane

Windows Message disappearing

mav.northwind5-Oct-05 22:28

mav.northwind

5-Oct-05 22:28

Hi Folks!

For an interface to another application I had to develop a C++ dll implementing a given interface. For testing purposes I had a VB6 emulator to try out my dll.
Everything worked well, but now that the dll is loaded into the real program, a windows message I send to fire an event from a different thread gets lost (i.e. is not received by the window I send it to).

The dll is a mixed mode dll. I'm registering a managed event handler for an event of a managed remoting server and this event handler is called without problems.
In order to signal the event back to the host program I have to transfer it to the original thread the dll was loaded in.
In order to achieve this I create an MFC window in the original thread and send a registered windows message to this window from the event handler.

This does work flawlessly in the test program, but when the dll is loaded into the real host application, the window doesn't receive the message.

Has anyone experienced something similar or can give me any hints on why this could be?

Thanks in advance,

mav

Re: Windows Message disappearing

mav.northwind6-Oct-05 5:26

mav.northwind

6-Oct-05 5:26

Update:
I was told my dll seems to work when the host application is not being run in the debugger.
I've read Surviving the Release Version[^] and think it could be related to mixing debug and release MFC (since I've delivered my dll as release build), but I'm not sure.

Nevertheless, any help would be greatly appreciated...

mav

Windows Services

Laji594-Oct-05 18:02

Laji59

4-Oct-05 18:02

Hi everybody

How can an application interact to a Windows Services or transact with it?

Tanks for your help

sunit58-Oct-05 2:15

sunit5

8-Oct-05 2:15

elaborate ur problem

Laji598-Oct-05 20:57

Laji59

8-Oct-05 20:57

Hi...

Excuse me!

What is your mean?

sunit58-Oct-05 2:16

sunit5

8-Oct-05 2:16

:->elaborate ur problem

Nemanja Trifunovic8-Oct-05 5:04

Nemanja Trifunovic

8-Oct-05 5:04

Generally, through some form of inter-process communication, although for some simple interactions (start, stop, pause, resume a service) SCP is more than enough.

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

Laji598-Oct-05 21:47

Laji59

8-Oct-05 21:47

Hi!
Thanks for your help

But What is the "SCP" ?
Please explain more obviously!

Anyway to force vs.net to compile uncalled header files?

Nemanja Trifunovic9-Oct-05 3:46

Nemanja Trifunovic

9-Oct-05 3:46

Mojtaba_WindowsServices wrote:
But What is the "SCP" ?

Service Control Program[^]

My programming blahblahblah blog. If you ever find anything useful here, please let me know to remove it.

FocusedWolf4-Oct-05 16:58

FocusedWolf

4-Oct-05 16:58

I'm basically playing with static libraries, with header files that don't have any cpp files...i.e. all code for all header files in static library is inlined, and vs.net won't compile unless i include a cpp file that calls the header files.

Is this a normal practice with other compilers, or just for vs.net...and if just for vs.net, is their an option to disable that?

Re: Anyway to force vs.net to compile uncalled header files?

Anonymous6-Oct-05 21:31

Reading all lines of a file

6-Oct-05 21:31

Right Click your header file ander soluton explorer and chose properties and under general chose don't use precomiled headers.

ps: I know this will work, but i am not 100% exactly where to find this setting, because i use public pc

Alex Cutovoi4-Oct-05 8:05

Alex Cutovoi

4-Oct-05 8:05

hi for all

This is a simple question but I have no idea how I can do this:
How can I read all lines from a file and insert a new line in a specific local?

thanks a lot for all

Alex Cutovoi

Re: Reading all lines of a file

gecool5-Oct-05 21:13

gecool

5-Oct-05 21:13

<br />
#include <fstream><br />
       std::ifstream   ifs("path/to_file");//u may "tweak" here: binary or //text<br />
        if (!ifs.is_open())<br />
                {//do some error checking here}<br />
 <br />
        std::string all_file,line;<br />
        while( !ifs.eof() )<br />
        {<br />
                getline(ifs, line);<br />
                all_file += line;<br />
                if (line.empty()) //you may do all_file +='\n'; here to<br />
//include empty lines too<br />
                        continue;<br />
}<br />

after this while exists, you have in all_file, well, all file Wink | ;-)

...

then you can insert your stuff in string all_file, close the original file open it with "w" or so (make sure the write poinetr is at the beginning of the file), and then write the modified content, that is all_file. Cool | :cool:

-- modified at 3:16 Thursday 6th October, 2005

Re: Reading all lines of a file

Anonymous6-Oct-05 21:28

Re: Reading all lines of a file

6-Oct-05 21:28

This is managed c++ forum, so it would be better to post managed code

Anonymous9-Oct-05 20:08

Client/server .... please HELP

9-Oct-05 20:08

to anonymous:

yo dude, according to my knowledges this forum is also related to plain C++ !!!. And beside that, reading all lines from a file, should merely follow the same idea, even in managed C (that is C#, not C++ Wink | ;-)

), right ?

Regards,
gecool

Member 23297074-Oct-05 7:21

Member 2329707

4-Oct-05 7:21

Hi all

Article "A light-weighted client/server socket class in C++" explains how to make a client/server application, but i am a beginner and want to know if there are tutorials out there that are simple to use and that explains, step by step, how to create the server application and the client application.
The apps should use sockets and be as simple as possible (basically just be able to wait for a request (server) and then send an acknowledgement to the client (just a basic text message). it should really only illustrate the basic phases: 1) idle(server waiting for a connection), (2)connection establishment, (3)data transfer, (4)termination.

I know that you need the ip address as well as well as a port for communication - but that is basically all i know

if there is anyone who can help by writing a basic program (or tutorial), or even refering me to websites (one for beginners, as all the websites i find are a bit advanced and confusing for the novice C++ network programmer), I would most certainly appreciate it.

thank you.

Re: Client/server .... please HELP

Member 19471947-Oct-05 10:53

Member 1947194

7-Oct-05 10:53

check out http://www.hal-pc.org/~johnnie2/winsock.html

C++ Problems...

AndrewVos3-Oct-05 16:33

AndrewVos

3-Oct-05 16:33

Hey...

Im trying to use a small bit of c++ code but have never done a line of it in my life.
I am looking for some help porting it into something readable. Doesn't have to be another language, I just need an explanation on whats going on.

I would learn some cpp myself but honestly I really don't have the time.

Any help would be greatly appreciated.
Thanks

Judah Gabriel Himango4-Oct-05 11:35

Judah Gabriel Himango

4-Oct-05 11:35

Ok...perhaps you could post the code here? Otherwise we cannot offer an explanation of it.

Tech, life, family, faith: Give me a visit.
I'm currently blogging about: Cops & Robbers
Judah Himango

AndrewVos5-Oct-05 18:24

AndrewVos

5-Oct-05 18:24

Cool, didnt get an email notifying me of a response.. sorry it took so long.

Heres the code. Its from a Microsoft sample app for creating a voice font, for SAPI.

/******************************************************************************
* mkvoice.cpp *
*-------------*
* This application assembles a simple voice font for the sample TTS engine.
*Copyright (c) Microsoft Corporation. All rights reserved.
*
******************************************************************************/
#include "stdafx.h"
#include <ttseng_i.c>
#include <direct.h>

int wmain(int argc, WCHAR* argv[])
{
USES_CONVERSION;
static const DWORD dwVersion = { 1 };
ULONG ulNumWords = 0;
HRESULT hr = S_OK;

//--- Check args
if( argc != 4 )
{
printf( "%s", "Usage: > mkvoice [[in]word list file] [[out]voice file] [voice name]\n" );
hr = E_INVALIDARG;
}
else
{
::CoInitialize( NULL );

//--- Open word list file and create output voice file
//--- _wfopen is not supported on Win9x, so use fopen.
FILE* hWordList = fopen( W2A(argv[1]), "r" );
FILE* hVoiceFile = fopen( W2A(argv[2]), "wb" );

if( hWordList && hVoiceFile )
{
//--- Write file version and leave space for word count
if( !fwrite( &dwVersion, sizeof(dwVersion), 1, hVoiceFile ) ||
fseek( hVoiceFile, 4, SEEK_CUR ) )
{
hr = E_FAIL;
}

//--- Get each entry
WCHAR WordFileName[MAX_PATH];
while( SUCCEEDED( hr ) && fgetws( WordFileName, MAX_PATH, hWordList ) )
{
ULONG ulTextLen = wcslen( WordFileName );
if( WordFileName[ulTextLen-1] == '\n' )
{
WordFileName[--ulTextLen] = NULL;
}
//--- Include NULL character when writing to the file
ulTextLen = (ulTextLen+1) * sizeof(WCHAR);

if( fwrite( &ulTextLen, sizeof(ulTextLen), 1, hVoiceFile ) &&
fwrite( WordFileName, ulTextLen, 1, hVoiceFile ) )
{
++ulNumWords;
//--- Open the wav data
ISpStream* pStream;
wcscat( WordFileName, L".wav" );
hr = SPBindToFile( WordFileName, SPFM_OPEN_READONLY, &pStream );
if( SUCCEEDED( hr ) )
{
CSpStreamFormat Fmt;
Fmt.AssignFormat(pStream);
if( Fmt.ComputeFormatEnum() == SPSF_11kHz16BitMono )
{
STATSTG Stat;
hr = pStream->Stat( &Stat, STATFLAG_NONAME );
ULONG ulNumBytes = Stat.cbSize.LowPart;

//--- Write the number of audio bytes
if( SUCCEEDED( hr ) &&
fwrite( &ulNumBytes, sizeof(ulNumBytes), 1, hVoiceFile ) )
{
BYTE* Buff = (BYTE*)alloca( ulNumBytes );
if( SUCCEEDED( hr = pStream->Read( Buff, ulNumBytes, NULL ) ) )
{
//--- Write the audio samples
if( !fwrite( Buff, 1, ulNumBytes, hVoiceFile ) )
{
hr = E_FAIL;
}
}
}
else
{
hr = E_FAIL;
}
}
else
{
printf( "Input file: %s has wrong wav format.", WordFileName );
}
pStream->Release();
}
}
else
{
hr = E_FAIL;
}
}
}
else
{
hr = E_FAIL;
}

//--- Write word count
if( SUCCEEDED( hr ) )
{
if( fseek( hVoiceFile, sizeof(dwVersion), SEEK_SET ) ||
!fwrite( &ulNumWords, sizeof(ulNumWords), 1, hVoiceFile ) )
{
hr = E_FAIL;
}
}

//--- Register the new voice file
// The section below shows how to programatically create a token for
// the new voice and set its attributes.
if( SUCCEEDED( hr ) )
{
CComPtr<ispobjecttoken> cpToken;
CComPtr<ispdatakey> cpDataKeyAttribs;
hr = SpCreateNewTokenEx(
SPCAT_VOICES,
argv[3],
&CLSID_SampleTTSEngine,
L"Sample TTS Voice",
0x409,
L"Sample TTS Voice",
&cpToken,
&cpDataKeyAttribs);

//--- Set additional attributes for searching and the path to the
// voice data file we just created.
if (SUCCEEDED(hr))
{
hr = cpDataKeyAttribs->SetStringValue(L"Gender", L"Male");
if (SUCCEEDED(hr))
{
hr = cpDataKeyAttribs->SetStringValue(L"Name", L"SampleTTSVoice");
}
if (SUCCEEDED(hr))
{
hr = cpDataKeyAttribs->SetStringValue(L"Language", L"409");
}
if (SUCCEEDED(hr))
{
hr = cpDataKeyAttribs->SetStringValue(L"Age", L"Adult");
}
if (SUCCEEDED(hr))
{
hr = cpDataKeyAttribs->SetStringValue(L"Vendor", L"Microsoft");
}

//--- _wfullpath is not supported on Win9x, so use _fullpath.
CHAR szFullPath[MAX_PATH * 2];
if (SUCCEEDED(hr) && _fullpath(szFullPath, W2A(argv[2]), sizeof(szFullPath)/sizeof(szFullPath[0])) == NULL)
{
hr = SPERR_NOT_FOUND;
}

if (SUCCEEDED(hr))
{
USES_CONVERSION;
hr = cpToken->SetStringValue(L"VoiceData", A2W(szFullPath));
}
}
}

//--- Cleanup
if( hWordList )
{
fclose( hWordList );
}
if( hVoiceFile )
{
fclose( hVoiceFile );
}
::CoUninitialize();
}
return FAILED( hr );
}

toxcct5-Oct-05 23:31

toxcct

5-Oct-05 23:31

if you want to learn C++, don't use this example !!!!

start with the basics, then start learnin at some libraries (Win32, MFC, ATL, ...), and only then, you could read some advanced examples like that.

TOXCCT >>> GEII power
[toxcct][VisualCalc]