iczelion tut32[6]

i'll review the steps in creating an mdi application for you again below.

1. register the window classes, both the frame window class and the mdi child window class
2. create the frame window with createwindowex.
3. within the message loop, call translatemdisysaccel to process the mdi-related accelerator keys
4. within the window procedure of the frame window, call defframeproc to handle all messages unhandled by your code.
5. create the client window by calling createwindowex using the name of the predefined window class, "mdiclient", passing the address of a clientcreatestruct structure in lparam. normally, you would create the client window within the wm_create handler of the frame window proc
6. you can create an mdi child window by sending wm_mdicreate to the client window or, alternatively, by calling createmdiwindow.
7. within the window proc of the mdi child window, pass all unhandled messages to defmdichildproc.
8. use mdi version of the messages if it exists. for example, use wm_mdidestroy instead of calling destroywindow

example:

.386 
.model flat,stdcall 
option casemap:none 
include \masm32\include\windows.inc    
include \masm32\include\user32.inc 
include \masm32\include\kernel32.inc 
includelib \masm32\lib\user32.lib 
includelib \masm32\lib\kernel32.lib 
winmain proto :dword,:dword,:dword,:dword    

.const 
idr_mainmenu 	equ 101 
idr_childmenu	equ 102 
idm_exit 		equ 40001 
idm_tilehorz	equ 40002 
idm_tilevert	equ 40003
idm_cascade	equ 40004 
idm_new 		equ 40005 
idm_close	equ 40006 

.data 
classname 	db "mdiasmclass",0 
mdiclientname	db "mdiclient",0 
mdichildclassname	db "win32asmmdichild",0 
mdichildtitle	db "mdi child",0 
appname		db "win32asm mdi demo",0 
closepromptmessage	db "are you sure you want to close this window?",0

.data? 
hinstance 	dd ? 
hmainmenu 	dd ? 
hwndclient 	dd ? 
hchildmenu 	dd ? 
mdicreate		mdicreatestruct <> 
hwndframe 	dd ? 

.code 
start: 
	invoke getmodulehandle, null    
	mov hinstance,eax 
	invoke winmain, hinstance,null,null, sw_showdefault 
	invoke exitprocess,eax 

winmain proc hinst:hinstance,hprevinst:hinstance,cmdline:lpstr,cmdshow:dword    
	local wc:wndclassex 
	local msg:msg 
	;=============================================    
	; register the frame window class 
	;=============================================    
	mov wc.cbsize,sizeof wndclassex 
	mov wc.style, cs_hredraw or cs_vredraw 
	mov wc.lpfnwndproc,offset wndproc 
	mov wc.cbclsextra,null 
	mov wc.cbwndextra,null 
	push hinstance
	pop wc.hinstance 
	mov wc.hbrbackground,color_appworkspace 
	mov wc.lpszmenuname,idr_mainmenu
	mov wc.lpszclassname,offset classname
	invoke loadicon,null,idi_application 
	mov wc.hicon,eax 
	mov wc.hiconsm,eax 
	invoke loadcursor,null,idc_arrow 
	mov wc.hcursor,eax    
	invoke registerclassex, addr wc 
	;================================================    
	; register the mdi child window class 
	;================================================    
	mov wc.lpfnwndproc,offset childproc 
	mov wc.hbrbackground,color_window+1 
	mov wc.lpszclassname,offset mdichildclassname 
	invoke registerclassex,addr wc 
	invoke createwindowex,null,addr classname,addr appname,\ 
			ws_overlappedwindow or ws_clipchildren,cw_usedefault,\    
			cw_usedefault,cw_usedefault,cw_usedefault,null,0,\ 
			hinst,null 
	mov hwndframe,eax    
	invoke loadmenu,hinstance, idr_childmenu 
	mov hchildmenu,eax 
	invoke showwindow,hwndframe,sw_shownormal 
	invoke updatewindow, hwndframe 
	.while true 
		invoke getmessage,addr msg,null,0,0 
		.break .if (!eax) 
		invoke translatemdisysaccel,hwndclient,addr msg 
		.if !eax 
			invoke translatemessage, addr msg 
			invoke dispatchmessage, addr msg 
		.endif 
	.endw 
	invoke destroymenu, hchildmenu 
	mov eax,msg.wparam 
	ret 
winmain endp 

wndproc proc hwnd:hwnd, umsg:uint, wparam:wparam, lparam:lparam 
	local clientstruct:clientcreatestruct    
	.if umsg==wm_create 
		invoke getmenu,hwnd 
		mov hmainmenu,eax 
		invoke getsubmenu,hmainmenu,1    
		mov clientstruct.hwindowmenu,eax 
		mov clientstruct.idfirstchild,100 
		invoke createwindowex,null,addr mdiclientname,null,\ 
				ws_child or ws_visibl