C / C++ / MFC Discussion Boards

Re: Subclass main Winamp window from plugin

u0m315-Jul-06 5:25

15-Jul-06 5:25

I started using this code for subclassing the main window: http://forums.winamp.com/showthread.php?s=&threadid=227006

Here's the relevant part:

int init()<br />
{<br />
  // This subclasses the main Winamp window, so we can receive all events it receives.<br />
  lpWndProcOld = (WNDPROC)SetWindowLong(plugin.hwndWinampParent,GWL_WNDPROC,(LONG)WndProc);<br />
<br />
  // This subclasses the Playlist Editor window, so we can receive all events it receives.<br />
  HWND pe = (HWND)SendMessage(plugin.hwndWinampParent,WM_WA_IPC,IPC_GETWND_PE,IPC_GETWND);<br />
  lpPEProcOld = (WNDPROC)SetWindowLong(pe, GWL_WNDPROC, (LONG)PlaylistEditorProc);<br />
<br />
  return 0;<br />
}

I used only the first part...

lpWndProcOld = (WNDPROC)SetWindowLong(plugin.hwndWinampParent,GWL_WNDPROC,(LONG)WndProc);

I got errors for plugin and (LONG)WndProc -> don't know how to get them... sorry... I'm a n00b.

Re: Subclass main Winamp window from plugin

u0m318-Jul-06 2:15

u0m3

18-Jul-06 2:15

hfry wrote:
lpWndProcOld = (WNDPROC)SetWindowLong(winampHWND, GWL_WNDPROC, (LONG) &MainWndProc);

What is MainWndProc? Or more importantly, how do I get it?

Re: Subclass main Winamp window from plugin

Justin Tay18-Jul-06 3:48

Justin Tay

18-Jul-06 3:48

It's your window procedure...

LRESULT CALLBACK MainWndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)

Can I still use DLLs ?

vcpp_cgr13-Jul-06 11:49

vcpp_cgr

13-Jul-06 11:49

I have a fairly large application (MFC App) developed in Visual C++ 6.0.
As it's growing constantly, it's getting bigger and bigger and I've started to modularize it by adding DLLs with Visual Studio 2003 and now Visual Studio 2005.

Is there a better method nowadays that I can use to add new modules to the app or is DLL still the classic method used ?
Thanks.

Re: Can I still use DLLs ?

Jun Du13-Jul-06 13:34

Jun Du

13-Jul-06 13:34

vcpp_cgr wrote:
is DLL still the classic method used

Pretty much the same, except that it's called assembly in the context of .NET Framework.

Best,
Jun

HBITMAP from clipboard

Luksky13-Jul-06 11:43

Luksky

13-Jul-06 11:43

How can I recieve HBITMAP from clipboard? Frown | :(

In both cases I;m getting empty bitmap:

1. HGLOBAL hMem = GetClipboardData( CF_BITMAP );
HBITMAP hBitmap = (HBITMAP) GlobalLock( hMem );

2. HBITMAP hBitmap = (HBITMAP) GetClipboardData( CF_BITMAP );

And second question:
how can I then create CBitmap object from HBITMAP?

Thanks for any help Smile | :)

~~~~

Re: HBITMAP from clipboard

C^hris L^osinger13-Jul-06 11:52

C^hris L^osinger

13-Jul-06 11:52

HBITMAP handle = (HBITMAP)GetClipboardData(CF_BITMAP);
CBitmap * bm = CBitmap::FromHandle(handle);

Do the chickens have large talons?

Re: HBITMAP from clipboard

Luksky14-Jul-06 0:18

Luksky

14-Jul-06 0:18

Then I need to draw this bitmap from clipboard. How can I select it for device context, to draw it on the screen?
This code isn't working:

	CDC dcTmp;<br />
	dcTmp.CreateCompatibleDC( pDC );<br />
<br />
	HBITMAP handle = (HBITMAP)GetClipboardData(CF_BITMAP);<br />
	CBitmap * bm = CBitmap::FromHandle(handle);<br />
	dcTmp.SelectObject( bm );<br />
<br />
pDC->BitBlt( 0,0,uWidth,uHeight, &dcTmp, 0,0,SRCCOPY );

~~~~

Re: HBITMAP from clipboard

Luksky15-Jul-06 5:21

Luksky

15-Jul-06 5:21

Please somebody help me Frown | :(

~~~~

Error: LNK2019: Unresolved external symbol...

jon-8013-Jul-06 10:42

jon-80

13-Jul-06 10:42

Code:
#include <iostream>
#include ".\PrimeGen.h"
using namespace std;

void main ()
{
CPrimeGen PrimeRange1(1,1000);

int iCountPrimes = 0;

for (int iCount = 1; iCount = 1000; iCount++)
{ if (PrimeRange1.PrimeNumber[iCount] == true)
{iCountPrimes ++;}
}
cout << iCountPrimes;
}
class CPrimeGen
{
public:
CPrimeGen(int iUpperBound);
CPrimeGen(int iUpperBound, int iInterval);
CPrimeGen(int iLowerBound, int iUpperBound, int iInterval);
virtual ~CPrimeGen();

bool isPrime (int iNumber);
bool *PrimeNumber; // array of PrimeNumbers

};

Jon

Re: Error: LNK2019: Unresolved external symbol...

C^hris L^osinger13-Jul-06 11:52

C^hris L^osinger

13-Jul-06 11:52

which symbol is unresolved ?

Do the chickens have large talons?

Re: Error: LNK2019: Unresolved external symbol...

jon-8014-Jul-06 6:15

jon-80

14-Jul-06 6:15

Test1 error LNK2019: unresolved external symbol __endthreadex referenced in function "void __stdcall AfxEndThread(unsigned int,int)" (?AfxEndThread@@YGXIH@Z)

Test1 error LNK2019: unresolved external symbol __beginthreadex referenced in function "public: int __thiscall CWinThread::CreateThread(unsigned long,unsigned int,struct _SECURITY_ATTRIBUTES *)" (?CreateThread@CWinThread@@QAEHKIPAU_SECURITY_ATTRIBUTES@@@Z)

Any ideas?

Jon

Re: Error: LNK2019: Unresolved external symbol...

Rilhas17-Jul-06 12:54

Rilhas

17-Jul-06 12:54

You are providing too little information. However, I would guess that you are missing a multithreading library. Make sure you are linking with multithread libraries.

Mutithreaded libraries are "LIBCMT.LIB" (release) and "LIBCMTD.LIB" (debug). However, I find it strange that the MFC is the one requesting the presence of "_beginthreadex" or "_endthreadex". This probably means you are not linking against MFC base libraries.

Anyway, try to link with the multothreaded libraries and see what you get. If it doesn't work then try to provide more information on the project settings (kind of project, compiler settings, linker settings, ...).

I hope this helps,
Rilhas

C++ Exception Programming

pgav13-Jul-06 9:50

pgav

13-Jul-06 9:50

Hello,

I'm trying to program a few exception classes for use in some software I'm working on. I'm more familliar with Java style of exception programming, and am having trouble finding some good API documentation on C++ exception classes. My plan was to inherit from exception, or runtime_error, however I can't find figure out what methods I'm inheriting without a good API. Does anone know of a good API page on the exeption classes?

Thanks.

Patrick

Re: C++ Exception Programming

led mike13-Jul-06 9:55

led mike

13-Jul-06 9:55

http://www.cplusplus.com/doc/tutorial/exceptions.html[^]

"Just about every question you've asked over the last 3-4 days has been "urgent". Perhaps a little planning would be helpful?"
Colin Angus Mackay in the C# forum

led mike

Re: C++ Exception Programming [modified]

pgav13-Jul-06 10:41

pgav

13-Jul-06 10:41

Thanks for the link, that puts me on the right trak; however, considering the following example:

<br />
// standard exceptions<br />
#include <iostream><br />
#include <exception><br />
using namespace std;<br />
<br />
class myexception: public exception<br />
{<br />
  virtual const char* what() const<br />
  {<br />
    return "My exception happened";<br />
  }<br />
} myex;<br />
<br />
int main () {<br />
  try<br />
  {<br />
    throw myex;<br />
  }<br />
  catch (exception& e)<br />
  {<br />
    cout << e.what() << endl;<br />
  }<br />
  return 0;<br />
}<br />

This example does part of what I'm looking for, however I'd like to have more options when using the exception class. I'd like to give the programmer the option of passing in their own error message to the exception class, or to just use the default. Anyone know where I can look fir this?

Thanks.

Patrick

-- modified at 16:47 Thursday 13th July, 2006

Re: C++ Exception Programming

led mike13-Jul-06 11:45

led mike

13-Jul-06 11:45

pgav wrote:
Anyone know where I can look fir this?

What Joe Woodbury said is correct. The C++ base exception class only defines what() so unless you want to use that you can just create your own base exception class to your own design requirements.

"Just about every question you've asked over the last 3-4 days has been "urgent". Perhaps a little planning would be helpful?"
Colin Angus Mackay in the C# forum

led mike

Re: C++ Exception Programming

Joe Woodbury13-Jul-06 11:12

Joe Woodbury

13-Jul-06 11:12

With C++ exceptions, you can throw any object, even an int if you feel like it. There is no base exception class. (STL has an exception class, but it's very limited.)

I STRONGLY suggest writing your own exception class and write it to fit your requirements.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

loading movie clip in openGl?

Noor Akhter13-Jul-06 9:49

Noor Akhter

13-Jul-06 9:49

hi,.....hhow can v load any movie clip in opengl?....`i have seen the tutorial in nehe..but it is not going wid the program i have developed..not showing the animation of the movie instead showing conflicts with already made tecxtures GL_TEXTURES_2D..how can v resolve dis?

Regards

NooR

Re: Plz Help newbie with AsyncSockets

Moak17-Jul-06 4:17

Moak

17-Jul-06 4:17

In the OnAccept() handler you need to accept the incoming socket.

How can i draw the curve shape of mountains in terrain of game?

Noor Akhter13-Jul-06 8:51

Noor Akhter

13-Jul-06 8:51