In OpenGL need create window two times.

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Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 21 Jan 2018, 11:40

For OpenGL need create window two times.
First i create window(window have procWin) and check suport formats.
Then i destroyed first window.

And create second window(window have the same procWin) but PeekMessage(for only second window) send me postquete !
And my program shut down.

My question if i create two windows , did i must registerclassex two times ?
And how correct destroy first window ?

I try two times registerclassex for win1(now procWin1Empty) and win2(proc Win2).
I destroy Win1 (eax=1) but peekmessage get info from Win1(procWin1Empty ) !
But proc Win2 not sending eny message ! And not see MessageBox,0,'Win2', 'Win 2' !
If i pressed Alf+F4 i see messageBox Close(from procWin1Empty)

Code:

proc procWin1Empty  hWnd2, msg2, wParam2, lParam2
              local ps:PAINTSTRUCT
              .if [msg2] = WM_CLOSE
             Msg 'Close'
            ; invoke  PostQuitMessage, 0
             return
             .endif

     .if [msg2] = WM_DESTROY
             Msg 'Destr'
           ;  invoke  PostQuitMessage, 0
             return
     .endif
             invoke  DefWindowProc, [hWnd2], [msg2], [wParam2], [lParam2]
              return
endp

Code:

proc Win2  hWnd, msg, wParam, lParam
              local ps:PAINTSTRUCT
pusha
     invoke MessageBox,0,'Win2', 'Win 2',0
     popa  
invoke  DefWindowProc, [hWnd], [msg], [wParam], [lParam]
return

Get message:

Code:

mov     [msg.message], 1
MaiLoopRender_m:
               cmp [msg.message],WM_QUIT
               jz  ExitWin
               invoke  PeekMessage, addr msg, NULL, 0, 0, PM_REMOVE
               test eax,eax
               jz l1
               invoke  TranslateMessage, addr msg
               invoke  DispatchMessage, addr msg
            l1:

Last edited by Roman on 21 Jan 2018, 13:00; edited 4 times in total

21 Jan 2018, 11:40

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 21 Jan 2018, 11:46

I use CreateWindowEx for create two windows. And two windows have:
wc WNDCLASSEX struct.
And wc2 WNDCLASSEX struct.
I read msdn CreateWindow function in user32 but not see in fasm user32.inc CreateWindowA.
And UnRegisterClassEx.

21 Jan 2018, 11:46

donn

Joined: 05 Mar 2010
Posts: 321

donn 21 Jan 2018, 16:11

Did the wndClassEx strucs have unique values? Did registering succeed?

I haven't used 2 Windows, but the following is a slightly annotated Window of mine. It's somewhat hackey, but I was referencing MSDN and just needed something running, so it's not that clean. May spark some ideas:

Code:

        ;struct tagWNDCLASSEX {
        ;  UINT      cbSize;                    ;UINT size 4
        ;  UINT      style;
        ;  WNDPROC   lpfnWndProc;               ;WNDPROC size 8
        ;  int       cbClsExtra;
        ;  int       cbWndExtra;
        ;  HINSTANCE hInstance;                 ;HINSTANCE size 8
        ;  HICON     hIcon;                     ;HICON  size 8
        ;  HCURSOR   hCursor;                   ;HCURSOR  size 8
        ;  HBRUSH    hbrBackground;             ;HBRUSH size 8
        ;  LPCTSTR   lpszMenuName;              ;LPCTSTR  size 8
        ;  LPCTSTR   lpszClassName;
        ;  HICON     hIconSm;                   ;HICON size 8

        mov rdx, 32512                          ; pass IDC_ARROW, MAKEINTRESOURCE(32512)
        mov rcx, 0
        sub rsp, 8*4
        call [LoadCursorA]
        add rsp, 8*4
        mov r12, rax
                

        mov rax, [newWindow.wndClassEx]
        mov qword [rax+0], 50h                          ;cbSize
        mov qword [rax+4], 0                            ;style
        lea r11, [windowMsgs]
        mov qword [rax+8], r11                          ;lpfnWndProc
        mov qword [rax+16], 0                           ;cbClsExtra
        mov qword [rax+20], 0                           ;cbWndExtra
        mov r10, [newWindow.moduleHandle]
        mov qword [rax+24], r10                         ;hInstance
        mov qword [rax+32], 0;r9                                ;hIcon
        mov qword [rax+40], r12                         ;hCursor
        mov qword [rax+48], 0                           ;hbrBackground
        mov qword [rax+56], 0                           ;lpszMenuName
        mov r10, appTitle
        mov qword [rax+64], r10                         ;lpszClassName
        mov qword [rax+72],0;r9                         ;hIconSm

        mov rcx, [newWindow.wndClassEx]
        sub rsp, 8*4
        call [RegisterClassExA]
        add rsp, 8*4

        sub rsp, 8*12
        mov qword [rsp+11*8], 0                         ;lpParam
        mov rcx, [newWindow.moduleHandle]
        mov qword [rsp+10*8],rcx                        ;hInstance
        mov qword [rsp+9*8], 0                          ;hMenu
        mov qword [rsp+8*8], 0                          ;hWndParent
        mov qword [rsp+7*8], 250                        ;nHeight
        mov qword [rsp+6*8], 300                        ;nWidth
        mov qword [rsp+5*8], 200                        ;y
        mov qword [rsp+4*8], 200                        ;x
        mov r9, 13565952                                ;dwStyle        ;0CF0000h
        mov r8, appTitle                                ;lpWindowName
        mov rdx, appTitle                               ;lpClassName
        mov rcx, 0                                      ;dwExStyle
        call [CreateWindowExA]
        add rsp, 8*12
        mov [newWindow.windowHandle], rax

Good luck.

https://stackoverflow.com/questions/18835592/win32-two-windows-using-the-same-wndproc-why

21 Jan 2018, 16:11

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 21 Jan 2018, 16:18

Two RegisterClassEx-s work fine.
And two CreateWindowEx-s Win1 and Win2 not get error.
And i see Win1 and Win2
But peekmessage get info from Win1(from procWin1Empty)
Because i press Alt+F4 and see MessageBox 'Close' ! But window Win1 not closed and steel work.
I do four times Alt+F4 and see MessageBox 'Close' always !

21 Jan 2018, 16:18

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 21 Jan 2018, 16:19

I create first Win1 then do Destroy,[hWnd2] (destroy Win1)
Then registre and create Win2 !

21 Jan 2018, 16:19

Roman

Joined: 21 Apr 2012
Posts: 1853

Roman 21 Jan 2018, 18:44

I found !
I create two windows with one name !
Two windows have name "OpenGL" !
And PeekMessage for this reason not correct get message from Win2 !
Now work fine !

21 Jan 2018, 18:44

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