如何将窗口句柄放入字节并在 FASM 中使用 winmm 播放视频？

问题描述

我一直在尝试使用 winmm 在我的应用程序中播放视频；我找到了一个 VB 示例并将其翻译成 FASM，但我不知道如何将窗口的句柄放入我尝试发送的字节中；

v1 db 'open 123.avi alias vid1 parent (the handle has to be here) style child',0
v2 db 'put vid1 window at 0 0 100 100',0 
v3 db 'Play vid1 notify',0
invoke mciSendString,v1,nullstring,v2,v3,0

我尝试使用 wprintf 但无济于事；有人可以给我一个在应用程序窗口中播放视频的例子吗？

解决方法

终于明白 wsprintf 的工作原理了！下面是一个视频播放器的工作示例：

    format PE GUI 4.0

include 'win32a.inc'
section '.text' code readable executable
start:
    invoke  GetModuleHandle,0
    mov [wc.hInstance],eax
    invoke  LoadIcon,IDI_APPLICATION
    mov [wc.hIcon],eax
    invoke  LoadCursor,IDC_ARROW
    mov [wc.hCursor],eax
    invoke CreateSolidBrush,0x000000
    mov [wc.hbrBackground],eax
    invoke  RegisterClass,wc
    test    eax,eax
    jz  error
    invoke  CreateWindowEx,_class,_title,WS_VISIBLE+WS_DLGFRAME+WS_SYSMENU,128,640,480,NULL,[wc.hInstance],NULL
    mov [hwnd],eax
    test    eax,eax
    jz  error



    invoke  wsprintf,str_buffer,str_format,[hwnd]
    invoke  mciSendString,0
    invoke  mciSendString,str_put,str_play,0


msg_loop:
    invoke  GetMessage,msg,0
    cmp eax,1
    jb  end_loop
    jne msg_loop
    invoke  TranslateMessage,msg
    invoke  DispatchMessage,msg
    jmp msg_loop

error:
    invoke  MessageBox,_error,MB_ICONERROR+MB_OK

end_loop:
    invoke  ExitProcess,[msg.wParam]


proc WindowProc uses ebx esi edi ecx,hwnd,wmsg,wparam,lparam
    cmp [wmsg],WM_DESTROY
    je  .wmdestroy

.defwndproc:
    invoke  DefWindowProc,[hwnd],[wmsg],[wparam],[lparam]
    jmp .finish

.wmdestroy:
    invoke  PostQuitMessage,0
    xor eax,eax
    jmp .finish

.finish:
    ret
endp


section '.data' data readable writeable


str_format  db  "open intro.wmv alias video parent %d style child",0
str_buffer  db  256 dup (0)
str_play db "play video notify",0
str_put db 'put video window at 0 0 0 0',0
hwnd dd ?

_class TCHAR 'FASMWIN32',0
_title TCHAR 'Video',0
_error TCHAR 'Error',0

msg MSG

wc WNDCLASS 0,WindowProc,COLOR_BACKGROUND,_class
  import  winmm,\
         mciSendString,'mciSendStringA'


   section '.idata' import data readable writeable

     library kernel32,'KERNEL32.DLL',\
             user32,'USER32.DLL',\
             gdi32,'GDI32.DLL',\
             advapi32,'ADVAPI32.DLL',\
             comctl32,'COMCTL32.DLL',\
             winmm,'WINMM.DLL',\
             comdlg32,'COMDLG32.DLL',\
             shell32,'SHELL32.DLL',\
             wsock32,'WSOCK32.DLL'

     include 'api/kernel32.inc'
include 'api/user32.inc'
include 'api/gdi32.inc'
include 'api/advapi32.inc'
include 'api/comctl32.inc'
include 'api/comdlg32.inc'
include 'api/shell32.inc'
include 'api/wsock32.inc'