NTK - Main Forum  »   SubclassWindow problem

Hi all:

Well, I´m new to this forum, so I have my first question...
I come from the C4W environment, where I was used to subclass my windows.
Now, I started converting my app into NTK, and I ran into the following problem:

I try to subclass the main window, and the app aborts without any warning at all...
So far I can see, this source should work without any problems; if I remove the subclass, everything works fine.

Here´s what I do:
For simplicity, I used as basis the HELLO.EXE source, where already exists a registered window (the main window).
So I reduced the source to the following:

IF !NTK_RegisterClass( CS_HREDRAW + CS_VREDRAW,; // CS_OWNDC + CS_VREDRAW + CS_HREDRAW + CS_DBLCLKS,;
hInst,;
hIcon,;
hCurs,;
hBrush,;
"NTKFEN",;
{ |hWnd, message, nwParam, nlParam|;
HELLOWNDPROC(hWnd, message, nwParam, nlParam) })
ENDIF
hWndDemo = NTK_CreateWindowEX(WS_EX_WINDOWEDGE, "NTKFEN", cWinTitle,F_MIN+F_MAX+WS_SYSMENU,0,0,640,480)
NTK_ShowWindow( hWndDemo, SW_SHOW )
NTK_UpdateWindow( hWndDemo )

nproc := NTK_SubClassWindow( hWndDemo, ;
{|hWnd,nMsg,nwParam,nlParam| ;
MyProcJan(nproc,hWnd,nMsg,nwParam,nlParam)},-1)

DO WHILE NTK_GetMessage( NTK_aMSG, 0 )
NTK_TranslateMessage( NTK_aMSG )
NTK_DispatchMessage( NTK_aMSG )
ENDDO

NTK_DeleteObject( hDemoFont1 )
NTK_SelectWindow( hWndDemo )
NTK_DestroyWindow( hWndDemo )
NTK_UnregisterClass( "NTKFEN", hInst )

And here are my Subclass Wndproc's:

FUNCTION HELLOWNDPROC( hWnd, message, nwParam, nlParam)
RETURN( NTK_DEFWNDPROC(hWnd, message, nwParam, nlParam) )

FUNCTION MyProcJan(nProc, hWnd, nMsg, nWparam, nLparam)
RETURN (NTK_CallWindowProc(nProc, hWnd, nMsg, nWparam, nLparam))

TIA, Jan

Hi Ab:

Tx for your answer!
Well, I hope to contribute in the future with some knowledge in this forum.

I´ve used subclassing for many, many things back in C4W, and as I´m trying to port a very big app (about 2.000.000 lines source), I really need this working... Will ask JN if he is able to shed some light on this...

If you don´t mind, I have just another question:
I need to incorporate the CREATEDIALOGINDIRECT API. Is this contained in the Pro version of NTK? Haven´t d
Just for the background: For all dialogs (which are contained in a .RES), I first read from memory the Template, convert this template to an understandable array for the CREATEDIALOGINDIRECT, and then I create a modeless dialog with it. We use this to translate at runtime dialogs, and to combine dialogs into a new one...
I have the source of all this, and it compiles fine with MSVC, but not in BCC :-((

Thanks in advance, Jan.

Hmmm, well, got FINDRESOURCE and so on working..
Now I´m stuck with BIN2A...
Will do some more research, before posting :-)))

BR, Jan

Jan,

FINDRESOURCE
LOADRESOURCE
LOCKRESOURCE
FREERESOURCE
Are they included in the PRO NTK version?

As far as I know, YES.

Regarding BIN2A and A2BIN, when I asked JN (long time ago) about this topic, he adviced me to rather use xharbour modern way of managing C structure. So far, I did like that.
Anyway you should be able to find source code of both function, and easily adapt it to NTK. It's just a matter of #include...

Cheers,
Ab

Jan,

**Related to the CREATEDIALOGINDIRECT, well, the NTK syntax is quite different from MSDN.

Indeed, but 100% similar to C4W CreateDialog() function. So, very easy to translate!

**But anyway, it is question of writing the HB_FUNC.
Ok, but using NTK_CreateDialog(), no need to deal with the LPCDLGTEMPLATE structure nor handle the callback procedure using a lpDialogFunc pointer... Personally I'm not a C guru.

Cheers,
Ab