or	eax,MF_BYCOMMAND
	invoke	CheckMenuItem,[wparam],IDM_REVIVEDEADKEYS,eax
	cmp	[help_path],0
	sete	bl
	neg	bl
	and	ebx,MF_GRAYED
	or	ebx,MF_BYCOMMAND
	invoke	EnableMenuItem,[wparam],IDM_CONTENTS,ebx
	invoke	EnableMenuItem,[wparam],IDM_KEYWORD,ebx
	jmp	finish
  wmcommand:
	mov	eax,[wparam]
	mov	ebx,[lparam]
	or	ebx,ebx
	jz	menu_command
	cmp	ebx,[hwnd_asmedit]
	jne	finish
	shr	eax,16
	cmp	eax,AEN_SETFOCUS
	je	update_status_bar
	cmp	eax,AEN_TEXTCHANGE
	je	update_status_bar
	cmp	eax,AEN_POSCHANGE
	je	update_status_bar
	cmp	eax,AEN_OUTOFMEMORY
	je	not_enough_mem
	jmp	finish
      update_status_bar:
	invoke	SendMessage,[hwnd_asmedit],AEM_GETPOS,aepos,0
	cinvoke wsprintf,string_buffer,_row_column,[aepos.caretLine],[aepos.caretPosition]
	invoke	SendMessage,[hwnd_status],SB_SETTEXT,0,string_buffer
	mov	esi,_null
	invoke	SendMessage,[hwnd_asmedit],EM_CANUNDO,0,0
	or	eax,eax
	jz	modified_status_ok
	mov	esi,_modified_status
      modified_status_ok:
	invoke	SendMessage,[hwnd_status],SB_SETTEXT,1,esi
	jmp	finish
      not_enough_mem:
	invoke	SendMessage,[hwnd_asmedit],AEM_FINDFIRST,0,0
	invoke	MessageBox,[hwnd],_memory_error,_caption,MB_ICONERROR+MB_OK
	jmp	finish
  menu_command:
	and	eax,0FFFFh
	mov	ebx,[hwnd_asmedit]
	cmp	eax,IDM_NEW
	je	new_file
	cmp	eax,IDM_OPEN
	je	open_file
	cmp	eax,IDM_SAVE
	je	save_file
	cmp	eax,IDM_SAVEAS
	je	save_file_as
	cmp	eax,IDM_NEXT
	je	next_file
	cmp	eax,IDM_PREVIOUS
	je	previous_file
	cmp	eax,IDM_OPENFOLDER
	je	open_folder
	cmp	eax,IDM_CLOSE
	je	close_file
	cmp	eax,IDM_DISCARD
	je	discard_file
	cmp	eax,IDM_EXIT
	je	exit
	cmp	eax,IDM_UNDO
	je	undo
	cmp	eax,IDM_CUT
	je	cut
	cmp	eax,IDM_COPY
	je	copy
	cmp	eax,IDM_PASTE
	je	paste
	cmp	eax,IDM_DELETE
	je	delete
	cmp	eax,IDM_SELECTALL
	je	select_all
	cmp	eax,IDM_VERTICAL
	je	vertical
	cmp	eax,IDM_POSITION
	je	position
	cmp	eax,IDM_FIND
	je	find
	cmp	eax,IDM_FINDNEXT
	je	findnext
	cmp	eax,IDM_REPLACE
	je	replace
	cmp	eax,IDM_RUN
	je	run
	cmp	eax,IDM_COMPILE
	je	compile
	cmp	eax,IDM_ASSIGN
	je	assign
	cmp	eax,IDM_APPEARANCE
	je	appearance
	cmp	eax,IDM_COMPILERSETUP
	je	compiler_setup
	cmp	eax,IDM_SECURESEL
	je	option_securesel
	cmp	eax,IDM_AUTOBRACKETS
	je	option_autobrackets
	cmp	eax,IDM_AUTOINDENT
	je	option_autoindent
	cmp	eax,IDM_SMARTTABS
	je	option_smarttabs
	cmp	eax,IDM_OPTIMALFILL
	je	option_optimalfill
	cmp	eax,IDM_REVIVEDEADKEYS
	je	option_revivedeadkeys
	cmp	eax,IDM_CONTENTS
	je	contents
	cmp	eax,IDM_KEYWORD
	je	keyword
	cmp	eax,IDM_PICKHELP
	je	pick_help
	cmp	eax,IDM_ABOUT
	je	about
	jmp	finish
  new_file:
	invoke	SendMessage,[hwnd],FM_NEW,_untitled,0
	jmp	finish
  open_file:
	mov	[ofn.lpstrFile],path_buffer
	mov	[path_buffer],0
	mov	[ofn.lpstrFilter],asm_filter
	mov	[ofn.Flags],OFN_EXPLORER+OFN_ALLOWMULTISELECT+OFN_FILEMUSTEXIST+OFN_HIDEREADONLY
	mov	[ofn.lpstrFileTitle],name_buffer
	mov	[ofn.lpstrTitle],NULL
	invoke	GetOpenFileName,ofn
	or	eax,eax
	jz	finish
	test	[ofn.Flags],OFN_ALLOWMULTISELECT
	jz	open_single_file
	mov	esi,path_buffer
	movzx	eax,[ofn.nFileOffset]
	add	esi,eax
	mov	byte [esi-1],'\'
	mov	edi,esi
      open_chosen_files:
	cmp	byte [esi],0
	je	finish
	push	edi
      move_file_name:
	lodsb
	stosb
	or	al,al
	jnz	move_file_name
	pop	edi
	invoke	GetFileTitle,path_buffer,name_buffer,100h
	invoke	SendMessage,[hwnd],FM_OPEN,name_buffer,path_buffer
	cmp	eax,-1
	jne	open_chosen_files
	invoke	wvsprintf,string_buffer,_loading_error,ofn.lpstrFile
	invoke	MessageBox,[hwnd],string_buffer,_caption,MB_ICONERROR+MB_OK
	jmp	open_chosen_files
      open_single_file:
	invoke	SendMessage,[hwnd],FM_OPEN,name_buffer,path_buffer
	cmp	eax,-1
	jne	finish
	invoke	wvsprintf,string_buffer,_loading_error,ofn.lpstrFile
	invoke	MessageBox,[hwnd],string_buffer,_caption,MB_ICONERROR+MB_OK
	jmp	finish
  save_file:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	invoke	SendMessage,[hwnd],FM_SAVE,eax,0
	or	eax,eax
	jnz	save_file_as
	jmp	finish
  save_file_as:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	mov	ebx,eax
	mov	[ei.header.mask],TCIF_PARAM
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEM,ebx,ei
	mov	eax,[ei.pszpath]
	or	eax,eax
	jnz	alloc_ok
	invoke	VirtualAlloc,0,1000h,MEM_COMMIT,PAGE_READWRITE
	mov	[ei.pszpath],eax
      alloc_ok:
	mov	[lparam],eax
	mov	[ofn.lpstrFile],eax
	mov	[ofn.lpstrFilter],asm_filter
	mov	[ofn.Flags],OFN_EXPLORER+OFN_HIDEREADONLY+OFN_OVERWRITEPROMPT
	invoke	GetSaveFileName,ofn
	or	eax,eax
	jz	save_cancelled
	mov	[ei.header.pszText],name_buffer
	mov	[ei.header.mask],TCIF_TEXT+TCIF_PARAM
	invoke	SendMessage,[hwnd_tabctrl],TCM_SETITEM,ebx,ei
	invoke	SendMessage,[hwnd],FM_SAVE,ebx,0
	xor	esi,esi
      check_if_overwritten:
	cmp	esi,ebx
	je	not_overwritten
	mov	[ei.header.mask],TCIF_PARAM
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEM,esi,ei
	or	eax,eax
	jz	save_ok
	invoke	lstrcmpi,[ei.pszpath],[lparam]
	or	eax,eax
	jz	remove_overwritten
      not_overwritten:
	inc	esi
	jmp	check_if_overwritten
      remove_overwritten:
	invoke	VirtualFree,[ei.pszpath],0,MEM_RELEASE
	invoke	SendMessage,[hwnd_tabctrl],TCM_DELETEITEM,esi,0
	cmp	[assigned_file],-1
	je	save_ok
	cmp	esi,[assigned_file]
	ja	save_ok
	je	assigned_overwritten
	dec	[assigned_file]
	jmp	save_ok
      assigned_overwritten:
	mov	[assigned_file],-1
      save_ok:
	xor	eax,eax
	jmp	finish
      save_cancelled:
	mov	eax,[lparam]
	xchg	eax,[ei.pszpath]
	cmp	eax,[ei.pszpath]
	je	finish
	invoke	VirtualFree,eax,0,MEM_RELEASE
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	invoke	SendMessage,[hwnd_tabctrl],TCM_SETITEM,eax,ei
	jmp	finish
  next_file:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEMCOUNT,0,0
	mov	ebx,eax
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	inc	eax
	cmp	eax,ebx
	jb	select_file
	xor	eax,eax
      select_file:
	push	eax
	invoke	SendMessage,[hwnd_tabctrl],TCM_SETCURSEL,eax,0
	pop	eax
	invoke	SendMessage,[hwnd],FM_SELECT,eax,0
	jmp	finish
  previous_file:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	sub	eax,1
	jnc	select_file
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEMCOUNT,0,0
	dec	eax
	call	select_file
	jmp	select_file
  open_folder:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEM,eax,ei
	or	eax,eax
	jz	finish
	mov	eax,[ei.pszpath]
	or	eax,eax
	jz	finish
	invoke	GetFullPathName,eax,1000h,path_buffer,param_buffer
	mov	edi,[param_buffer]
	xor	al,al
	stosb
	invoke	ShellExecute,HWND_DESKTOP,NULL,path_buffer,NULL,NULL,SW_SHOWNORMAL
	jmp	finish
  close_file:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEMCOUNT,0,0
	cmp	eax,1
	jbe	close_window
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	mov	ebx,eax
	mov	[ei.header.mask],TCIF_PARAM+TCIF_TEXT
	mov	[ei.header.pszText],name_buffer
	mov	[ei.header.cchTextMax],100h
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEM,ebx,ei
	mov	eax,[ei.hwnd]
	mov	[wparam],eax
	invoke	SendMessage,eax,EM_CANUNDO,0,0
	or	eax,eax
	jnz	close_modified
	cmp	[ei.pszpath],0
	jne	do_close
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEMCOUNT,0,0
	cmp	eax,1
	jne	do_close
	jmp	failed
      close_modified:
	mov	eax,MB_ICONQUESTION+MB_YESNOCANCEL
	or	eax,[lparam]
	invoke	MessageBox,[hwnd],_saving_question,[ei.header.pszText],eax
	cmp	eax,IDCANCEL
	je	failed
	cmp	eax,IDNO
	je	do_close
	invoke	SendMessage,[hwnd],WM_COMMAND,IDM_SAVE,0
	or	eax,eax
	jnz	failed
      do_close:
	cmp	[ei.pszpath],0
	je	delete_tab
	invoke	VirtualFree,[ei.pszpath],0,MEM_RELEASE
      delete_tab:
	invoke	SendMessage,[hwnd_tabctrl],TCM_DELETEITEM,ebx,0
	cmp	ebx,[assigned_file]
	jg	tab_deleted
	je	assigned_deleted
	dec	[assigned_file]
	jmp	tab_deleted
      assigned_deleted:
	mov	[assigned_file],-1
      tab_deleted:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETITEMCOUNT,0,0
	dec	eax
	cmp	eax,ebx
	jge	select_next
	sub	ebx,1
	jnc	select_next
	invoke	SendMessage,[hwnd],FM_NEW,_untitled,0
	jmp	destroy_asmedit
      select_next:
	invoke	SendMessage,[hwnd_tabctrl],TCM_SETCURSEL,ebx,0
	invoke	SendMessage,[hwnd],FM_SELECT,ebx,0
      destroy_asmedit:
	invoke	DestroyWindow,[wparam]
	xor	eax,eax
	jmp	finish
  discard_file:
	mov	[lparam],MB_DEFBUTTON2
	jmp	close_file
  exit:
	mov	[lparam],0
	jmp	close_window
  undo:
	invoke	SendMessage,ebx,WM_UNDO,0,0
	jmp	finish
  cut:
	invoke	SendMessage,ebx,WM_CUT,0,0
	jmp	finish
  copy:
	invoke	SendMessage,ebx,WM_COPY,0,0
	jmp	finish
  paste:
	invoke	SendMessage,ebx,WM_PASTE,0,0
	jmp	finish
  delete:
	invoke	SendMessage,ebx,WM_CLEAR,0,0
	jmp	finish
  select_all:
	mov	[aepos.selectionLine],1
	mov	[aepos.selectionPosition],1
	mov	[aepos.caretLine],-1
	mov	[aepos.caretPosition],1
	invoke	SendMessage,ebx,AEM_SETPOS,aepos,0
	invoke	SendMessage,ebx,AEM_GETPOS,aepos,0
	invoke	SendMessage,ebx,AEM_GETLINELENGTH,[aepos.caretLine],0
	inc	eax
	mov	[aepos.caretPosition],eax
	invoke	SendMessage,ebx,AEM_SETPOS,aepos,0
	jmp	finish
  vertical:
	invoke	SendMessage,ebx,AEM_GETMODE,0,0
	xor	eax,AEMODE_VERTICALSEL
	invoke	SendMessage,ebx,AEM_SETMODE,eax,0
	jmp	finish
  position:
	invoke	DialogBoxParam,[hinstance],IDD_POSITION,[hwnd],PositionDialog,0
	jmp	finish
  find:
	invoke	DialogBoxParam,[hinstance],IDD_FIND,[hwnd],FindDialog,0
	or	eax,eax
	jz	finish
	invoke	SendMessage,ebx,AEM_FINDFIRST,[search_settings],search_string
	or	eax,eax
	jnz	finish
      not_found:
	invoke	MessageBox,[hwnd],_not_found,_caption,MB_ICONINFORMATION+MB_OK
	jmp	finish
  findnext:
	invoke	SendMessage,ebx,AEM_FINDNEXT,0,0
	or	eax,eax
	jz	not_found
	jmp	finish
  replace:
	invoke	DialogBoxParam,[hinstance],IDD_REPLACE,[hwnd],ReplaceDialog,0
	or	eax,eax
	jz	finish
	invoke	SendMessage,ebx,AEM_FINDFIRST,[search_settings],search_string
	or	eax,eax
	jz	not_found
	invoke	SendMessage,ebx,AEM_GETMODE,0,0
	push	eax
	and	eax,not (AEMODE_VERTICALSEL + AEMODE_OVERWRITE)
	invoke	SendMessage,ebx,AEM_SETMODE,eax,0
      .confirm_replace:
	test	[command_flags],CF_REPLACEPROMPT
	jz	.replace
	invoke	UpdateWindow,edi
	invoke	MessageBox,[hwnd],_replace_prompt,_caption,MB_ICONQUESTION+MB_YESNOCANCEL
	cmp	eax,IDCANCEL
	je	.replace_finish
	cmp	eax,IDNO
	je	.replace_next
      .replace:
	push	ebx edi
	invoke	SendMessage,ebx,EM_REPLACESEL,FALSE,replace_string
	pop	edi ebx
      .replace_next:
	invoke	SendMessage,ebx,AEM_FINDNEXT,0,0
	or	eax,eax
	jnz	.confirm_replace
      .replace_finish:
	pop	eax
	invoke	SendMessage,ebx,AEM_SETMODE,eax,0
	jmp	finish
  run:
	invoke	SendMessage,[hwnd],FM_COMPILE,0,FALSE
	or	eax,eax
	jnz	finish
	mov	[sinfo.cb],sizeof.STARTUPINFO
	mov	[sinfo.dwFlags],0
	cmp	[output_format],3
	ja	run_object
	invoke	CreateProcess,path_buffer,NULL,NULL,NULL,FALSE,NORMAL_PRIORITY_CLASS,NULL,NULL,sinfo,pinfo
	invoke	CloseHandle,[pinfo.hThread]
	invoke	CloseHandle,[pinfo.hProcess]
	jmp	finish
      run_object:
	invoke	MessageBox,[hwnd],_run_object_error,_caption,MB_ICONERROR+MB_OK
	jmp	finish
  compile:
	invoke	SendMessage,[hwnd],FM_COMPILE,0,TRUE
	jmp	finish
  assign:
	invoke	SendMessage,[hwnd_tabctrl],TCM_GETCURSEL,0,0
	cmp	eax,[assigned_file]
	jne	do_assign
	or	eax,-1
      do_assign:
	invoke	SendMessage,[hwnd],FM_ASSIGN,eax,0
	jmp	finish
  appearance:
	invoke	DialogBoxParam,[hinstance],IDD_APPEARANCE,[hwnd],AppearanceSetup,0
	or	eax,eax
	jnz	update
	jmp	finish
  compiler_setup:
	invoke	DialogBoxParam,[hinstance],IDD_COMPILERSETUP,[hwnd],CompilerSetup,0
	jmp	finish
  option_securesel:
	xor	[asmedit_style],AES_SECURESEL
	jmp	update
  option_autobrackets:
	xor	[asmedit_style],AES_AUTOBRACKETS
	jmp	update
  option_autoindent:
	xor	[asmedit_style],AES_AUTOINDENT
	jmp	update
  option_smarttabs:
	xor	[asmedit_style],AES_SMARTTABS
	jmp	update
  option_optimalfill:
	xor	[asmedit_style],AES_OPTIMALFILL
	jmp	update
  option_revivedeadkeys:
	xor	[asmedit_style],AES_REVIVEDEADKEYS
	jmp	update
  contents:
	call	get_help_file_extension
	cmp	eax,'.hlp'
	je	winhelp_contents
	call	check_htmlhelp
	jc	winhelp_contents
	invoke	HtmlHelp,[hwnd],help_path,HH_DISPLAY_TOPIC,0
	jmp	finish
      winhelp_contents:
	invoke	WinHelp,[hwnd],help_path,HELP_FINDER,0
	jmp	finish
      get_help_file_extension:
	mov	esi,help_path
      skip_help_path:
	lodsb
	or	al,al
	jnz	skip_help_path
	mov	ebx,characters
	dec	esi
	mov	ecx,4
      convert_extension:
	dec	esi
	shl	eax,8
	mov	al,[esi]
	xlatb
	loop	convert_extension
	retn
      check_htmlhelp:
	cmp	[HtmlHelp],0
	jne	htmlhelp_ok
	invoke	LoadLibrary,_htmlhelp_library
	or	eax,eax
	jz	htmlhelp_unavailable
	invoke	GetProcAddress,eax,_htmlhelp_api
	or	eax,eax
	jz	htmlhelp_unavailable
	mov	[HtmlHelp],eax
      htmlhelp_ok:
	clc
	retn
      htmlhelp_unavailable:
	stc