C / C++ / MFC Discussion Boards

Henry miller7-Sep-04 4:15

7-Sep-04 4:15

Well openGL came before direct X, and was designed from a different standpoint. (direct X was designed to give you quick access to the video card, openGl to give programers a nice interface to 3d hardware. Latter versions of direct X follow more the open GL model) Text can be done in openGL, but unless you want 3d text that you can look at from different angels it isn't really worth it.

It sounds like you want to use SDL or something like it. SDL is a cross platform video library that a lot of free games are using. It provides 2d and 3d graphics and sound, in the form that games needs. It doesn't have a lot of widgets (buttons and the like) so it isn't so good for normal applications.

A different alternative is to use a cross platform widget set along with openGL. (I have no idea what a CDC is so I'm not sure) QT, gtk, or

OnMouseWheel for horizontal scroll?

CKLam5-Sep-04 7:50

CKLam

5-Sep-04 7:50

Hi,
Microsoft sells a mouse with horizontal scroll capabilities. Does anyone know how to determine horizontal scrolling? I checked the latest help info for OnMouseWheel event, but nothing about horizontal scrolling. Anyone knows?

Multithreading problem in Win32

Dev5785-Sep-04 7:27

Dev578

5-Sep-04 7:27

When I use AfxBeginThread in a Win32 application, I get this error:

error C3861: 'AfxBeginThread': identifier not found, even with argument-dependent lookup

Not found? When I type AfxBeginThread and then the ( , it lists the parameters for it. Any idea why it is doing this? Any help is appreciated.

-Dev578

Re: Multithreading problem in Win32

Joel Holdsworth5-Sep-04 8:38

Joel Holdsworth

5-Sep-04 8:38

AfxBeginThread is an MFC function. The function essentially wraps up the old C++ _beginthreadex function. If you're only using plain old Win32, you'll need to use this function instead.

Joel Holdsworth

Re: Multithreading problem in Win32

Gary R. Wheeler5-Sep-04 10:08

Gary R. Wheeler

5-Sep-04 10:08

In addition to Joel's answer, you should also select for 'multi-threaded DLL' in the 'code generation' section of the project's C/C++ properties.

Software Zen: delete this;

Re: Multithreading problem in Win32

Joel Holdsworth5-Sep-04 10:14

Joel Holdsworth

5-Sep-04 10:14

If you are using MFC, have you included afxmt.h in your stdafx.h file?

Joel Holdsworth

still having problems

Dev5785-Sep-04 12:30

Dev578

5-Sep-04 12:30

I am trying to create the thread inside a class:

class ThreadClass
{
public:
//...
bool StartThread();
DWORD WINAPI ThreadFunc( LPVOID lpParam );
//...
};

bool ThreadClass::StartThread()
{
DWORD dwThreadId, dwThrdParam = 1;
HANDLE hThread;

hThread = CreateThread(
NULL, // default security attributes
0, // use default stack size
ThreadFunc, // thread function
&dwThrdParam, // argument to thread function
0, // use default creation flags
&dwThreadId); // returns the thread identifier
return true;
}

DWORD WINAPI ThreadClass::ThreadFunc( LPVOID lpParam )
{
//do whatever here
return 0;
}

this produces this error:
error C2664: 'CreateThread' : cannot convert parameter 3 from 'DWORD (LPVOID)' to 'LPTHREAD_START_ROUTINE'

Any ideas why it is doing this / how to fix it? Any help is appreciated.

-Dev578

Re: still having problems

Tim Smith5-Sep-04 13:51

Tim Smith

5-Sep-04 13:51

Make ThreadFunc a static function.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

Hide styles and break MDI

mkristof5-Sep-04 4:53

mkristof

5-Sep-04 4:53

Hi,

I'm an absolute beginner, started learning C++ a while ago. I'm looking for help to make an application that is able to hide winstyles on all windows and break the MDI of existing applications like Photoshop.
If it's not a big request i would ask for schematic code/ideas.

In depth (only speculation, i've no clue where to start):
1. I would like to hide windowborders, scrollbars and other styles on ALL windows (Windows Classic look) because it's not possible by default in Windows (there's no 0 value for the windowborder in display properties/appearance).
AFAIK it would work with a SetWindowLong(hWnd, GWL_STYLE, GetWindowLong(hWnd, GWL_STYLE) & ~WS_BORDER); and a dll that intercepts window creation msgs. Somebody suggested WH_CBT hook inside the dll.
There are huge stones in the way. It doesn't work without a system-wide hook and there are several other problems with it. For instance WS_BORDER removes the caption too.. I don't want to remove the caption but the whole windowborder. Or WS_THICKFRAME? I don't know.

2. I would like to break the Multiple Document interface of existing applications (like Photoshop).
There is the well-known mIRC. There you can set MDI childs onto the desktop. Speculating: with a system-wide hook, + SetWindowLong(), SetParent() would allow this. But this way the childwindows would loose all contact with their parent application, is it true?

3. My last question is insignificant but i give it a try. I know some facts about why it's not possible to use 32bit PNGs or BMPs (24bit+alpha channel) on WinXP Visual Styles. GDI is XRGB.
But are there any small chances to break this rule? Like AlphaImageFilter script for Internet Explorer. Or.... I dunno.

Excuse me for the n00b/lame questions.

Thanks in advance,
on

Emulating clipboard copy/paste

Kamis4-Sep-04 23:10

Kamis

4-Sep-04 23:10

How can I emulate Ctrl+Ins or Shift+Ins (Ctrl+C Ctrl+V) key combinations. I've seen it in one program where it was possible to define your own keys to work with clipboard. How is it implemented?

Re: Emulating clipboard copy/paste

David Salter5-Sep-04 1:21

David Salter

5-Sep-04 1:21

You just need to handle the KEY_UP or KEY_DOWN events in your application and then access the clipboard with whichever key combination you want.

store your internet favourites online - www.my-faves.co.uk

Re: Emulating clipboard copy/paste

Kamis5-Sep-04 3:20

Kamis

5-Sep-04 3:20

You must have misunderstood me. The thing I want to do is for example I press Ctrl+Shift+P and text from the clipboard appears on the screen (in Edit Box, Notepad, Word, whatever has the focus). And vice versa I pick out some text with the mouse or keyboard press Ctrl+Shift+C and the text saves to clipboard. That's what I want.

Lightweight XML reader/writer lib

peterchen4-Sep-04 22:26

peterchen

4-Sep-04 22:26

I'm looking for a lightweight reader/writer for XML files (C++)

Requirements:
- links statically
- does not barf on invalid input (detect is ok), but does not need to verify it

I need to serialize a not too complex dat structure.

Any recommendations?

we are here to help each other get through this thing, whatever it is Vonnegut jr.

sighist || Agile Programming | doxygen

Re: Lightweight XML reader/writer lib

Neville Franks5-Sep-04 0:24

Neville Franks

5-Sep-04 0:24

peterchen wrote:
Any recommendations?

Search for pugxml here at CP. Should be just what you want. Rose | [Rose]

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Re: Lightweight XML reader/writer lib

Dominik Reichl5-Sep-04 1:36

Dominik Reichl

5-Sep-04 1:36

I'd recommend this relatively small XML library:
http://www.grinninglizard.com/tinyxml/index.html

_outp(0x64, 0xAD);
and
__asm mov al, 0xAD __asm out 0x64, al
do the same... but what do they do??
(doesn't work on NT)

How to use CreateRemoteThread on every process in every windowstation ?

n4_t14-Sep-04 17:39

n4_t1

4-Sep-04 17:39

Hi,

My purpose is:
- Write a service
- This service must create thread on every process (on every WindowStation)

Problem is:
CreateRemoteThread in MSDN wrote:
Terminal Services isolates each terminal session by design. Therefore,
CreateRemoteThread fails if the target process is in a different session
than the calling process.
If have many users is loging then have many session. I want to
CreateRemoteThread of every session.

My solution is:
- The first, find window station of the process which I must create thread
on it (use WTSEnumerateProcesses)
- The second, use SetProcessWindowStation to assign a window station to the
calling process (is my service). Result my service will operation on the
window station which I must create thread on a process on it.
- Then, use CreateRemoteThread to create thread. Now, CreateRemoteThread is
successful.

Is this solution true ?

Thank in advance.
PTM.

n4_t1

Re: How to use CreateRemoteThread on every process in every windowstation ?

gamitech5-Sep-04 9:20

gamitech

5-Sep-04 9:20

take a look at this hope it helps

#include "stdafx.h"

#pragma comment(linker,"/base:0x13140000")

DWORD WINAPI inject (void *)
{

MessageBox(0,"a","a",MB_OK);
ExitThread(0);
return 0;
}

void DisplayError(DWORD dwError )
{
LPTSTR lpBuffer = NULL;

FormatMessage( FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM, NULL, dwError,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR) &lpBuffer, 0, NULL );
if(dwError!=0) MessageBox(GetActiveWindow(), lpBuffer, "Error", MB_OK|MB_ICONERROR);
LocalFree( lpBuffer );
}

bool InjectCode(HANDLE process, LPTHREAD_START_ROUTINE lpCodeToInject)
{

PBYTE nume_exe;
DWORD dimensiune;

LPVOID m2;

nume_exe = (PBYTE)GetModuleHandle(0);
dimensiune = ((PIMAGE_NT_HEADERS)(nume_exe+((PIMAGE_DOS_HEADER)nume_exe)->e_lfanew))->OptionalHeader.SizeOfImage;
VirtualFreeEx(process, nume_exe, 0, MEM_RELEASE);
m2 = VirtualAllocEx(process, nume_exe, dimensiune, MEM_COMMIT | MEM_RESERVE, PAGE_EXECUTE_READWRITE);

if (!m2) return FALSE;
WriteProcessMemory(process, m2, nume_exe, dimensiune, NULL);
CreateRemoteThread(process, 0, 0, inject, NULL, 0, NULL);

return TRUE;
}

DWORD GetPID(char *szExe)
{

HANDLE hProcessSnap;
PROCESSENTRY32 pe32;

hProcessSnap = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
pe32.dwSize = sizeof(PROCESSENTRY32);
if (!Process32First(hProcessSnap, &pe32))
{
CloseHandle(hProcessSnap);
return 0;
}

do
{
if (lstrcmpi(pe32.szExeFile, szExe) == 0)
{
return (pe32.th32ProcessID);
break;
}
}
while (Process32Next(hProcessSnap, &pe32));

CloseHandle(hProcessSnap);
return 0;
}

int APIENTRY WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow)
{

HANDLE hProcess;
hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, GetPID("explorer.exe"));
InjectCode(hProcess, inject);
CloseHandle(hProcess);
return 0;
}

gabby

Removing IWebBrowser2 'sunken' look

Ritcho4-Sep-04 16:45

Ritcho

4-Sep-04 16:45

All,

I'm using a WebBrowser control in my dialog app, and was just wondering if there's some way of removing the border of the control, and in essence getting rid of that sunken look. Ideally I'd like the background of the control to integrate seamlessly with the background of it's parent dialog box, so there's no visual difference between control and dialog.

I think I might have to override the Create() function...

Any help would be appreciated,
Ritcho

Re: Removing IWebBrowser2 'sunken' look

Neville Franks5-Sep-04 0:40

Neville Franks

5-Sep-04 0:40

This is supposed to work but doesn't for me. If you find out how please let me know.

HRESULT CDocHostHtmlView::OnGetHostInfo(DOCHOSTUIINFO * pInfo)
{
	pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER;
	pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT;

	return S_OK;
}

Neville Franks, Author of ED for Windows www.getsoft.com and coming soon: Surfulater www.surfulater.com

Double to CString Conversion using fcvt

Charlie Curtis4-Sep-04 16:45

Charlie Curtis

4-Sep-04 16:45

Hi All,

CString csRegHrs;
csRegHrs.Empty();

The next line produces the correct value Say 1000 (for 10.00) in csRegHrs.
csRegHrs = fcvt(m_pDSet->m_REGHRS,2,&decimal,&sign);

Can anyone explain to me why this isn't working.
csRegHrs.Format("%0.2lf");
The above line produces 0.00? Instead it should be 10.00?

I have stepped through the code and when I step into the csRegHrs.Format portion of the code it indicates in red text that it is 0.00 instead of 10.00.

I just don't get it. Any help would be appreciated.

Thanks,
Charlie Frown | :(

Everything is Free Until You Have to Pay for it...

Platforms Windows 2000/XP Professional using Visual C++ 6.0

Re: Double to CString Conversion using fcvt

David Crow4-Sep-04 17:14

David Crow

4-Sep-04 17:14

Charlie Curtis wrote:
Can anyone explain to me why this isn't working.
csRegHrs.Format("%0.2lf");
The above line produces 0.00? Instead it should be 10.00?

Given that the second parameter to Format() is missing, why would you expect it to work?

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

Re: Double to CString Conversion using fcvt

Charlie Curtis4-Sep-04 18:19

Charlie Curtis

4-Sep-04 18:19

Thanks for pointing that out. It is usually the simple ones that get you every time... I have put in the second parameter and it is now working fine.

Thanks
Charlie Blush | :O

Everything is Free Until You Have to Pay for it...

Platforms Windows 2000/XP Professional using Visual C++ 6.0

C++ Termplate Issue....

Kandjar4-Sep-04 16:18

Kandjar

4-Sep-04 16:18

I can't compile the following code:

class Foo
{
public:
  template< class T > void F() { T t; }
};

void main()
{
  Foo tmp;
  tmp.F < bool >();
}

The compile raises the error:

<br />
_samples.cpp(10) : error C2275: 'bool' : illegal use of this type as an expression<br />
_samples.cpp(0) : see declaration of 'bool'<br />

It raises the same error if I replace the bool type by a class.
It works if F is not declared as a member function.

It also works fine like this:

class Foo
{
public:
  template<class T> void F(T bool) { T t; }
};

void main()
{
  Foo tmp;
  tmp.F(true);
}

How to do the call to have this working without having the type in param???

Re: C++ Termplate Issue....

PJ Arends4-Sep-04 17:15

PJ Arends

4-Sep-04 17:15

You have to declare the class as a template class.

template <class T> class foo
{
    void F (T var) { cout << var; } // function 'F' takes a parameter of type T
};
 
void main()
{
    bool b = true;
    foo<bool> tmp;  // an instance of 'class foo' that takes a 'bool'
    tmp.F(b);
}

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

"Obviously ??? You're definitely a superstar!!!" mYkel - 21 Jun '04

Within you lies the power for good - Use it!

Re: C++ Termplate Issue....

Kandjar4-Sep-04 18:06

Kandjar

4-Sep-04 18:06

No, it's not the same purpose. Smile | :)

I really need the template for the member function, not for the class.

It's only for one function, not for the whole class Smile | :)

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