Hola a todos, actualmente estoy aprendiendo sobre listview y me surge la siguiente duda con el parámetro hWnd de la API SendMessage:

Tengo el siguiente código:

TITLE  listview
 
.386
option casemap:none
.model flat,stdcall
include		c:\masm32\include\windows.inc
include		c:\masm32\include\kernel32.inc
include		c:\masm32\include\user32.inc
include		c:\masm32\include\comctl32.inc
 
includelib	c:\masm32\lib\kernel32.lib
includelib	c:\masm32\lib\user32.lib
includelib	c:\masm32\lib\comctl32.lib
 
DlgProc PROTO,
	hWnd:HWND,
	uMsg:UINT,
	wParam:WPARAM,
	lParam:LPARAM 
 
.const
 
.data
DlgName		byte	"Hola",0
Heading1	byte	"Test1",0
Heading2	byte	"Test2",0
 
.data?
hInstance 	HINSTANCE	?
CommandLine LPSTR		?
 
.code
InsertColumn proc,
	hWnd:HWND
	LOCAL lvc:LV_COLUMN
	mov lvc.imask,LVCF_TEXT+LVCF_WIDTH
	mov lvc.pszText,offset Heading1
	mov lvc.lx,150
	invoke SendMessage,hWnd, LVM_INSERTCOLUMN,0,addr lvc
	or lvc.imask,LVCF_FMT
	mov lvc.fmt,LVCFMT_RIGHT
	mov lvc.pszText,offset Heading2
	mov lvc.lx,100
	invoke SendMessage,hWnd, LVM_INSERTCOLUMN, 1 ,addr lvc	
	ret		
InsertColumn endp
 
start:
invoke GetModuleHandle,NULL
mov hInstance,eax
invoke GetCommandLine
mov CommandLine,eax
invoke DialogBoxParam,hInstance,ADDR DlgName,NULL,ADDR DlgProc,NULL 
invoke ExitProcess,eax
DlgProc PROC hWnd:HWND,uMsg:UINT,wParam:WPARAM,lParam:LPARAM
	.IF uMsg == WM_INITDIALOG
		invoke InitCommonControls
		invoke InsertColumn,hWnd
;		invoke GetDlgItem,hWnd,IDC_FOCUS
;		invoke SetFocus,eax
	.ELSEIF uMsg == WM_CLOSE
		invoke EndDialog,hWnd,NULL
	.ELSE
		mov eax,FALSE
		ret
	.ENDIF
	mov eax,TRUE
	ret
DlgProc ENDP
END start

El problema que tengo es que la siguiente línea no funciona correctamente:

invoke SendMessage,hWnd, LVM_INSERTCOLUMN,0,addr lvc

¿alguien podría guiarme para insertar las columnas?, saludos y gracias de ante mano

Solución: obtener con GetDlgItem el manejador:

TITLE  listview
 
.386
option casemap:none
.model flat,stdcall
include		c:\masm32\include\windows.inc
include		c:\masm32\include\kernel32.inc
include		c:\masm32\include\user32.inc
include		c:\masm32\include\comctl32.inc
 
includelib	c:\masm32\lib\kernel32.lib
includelib	c:\masm32\lib\user32.lib
includelib	c:\masm32\lib\comctl32.lib
 
DlgProc PROTO,
	hWnd:HWND,
	uMsg:UINT,
	wParam:WPARAM,
	lParam:LPARAM 
 
.const
IDC_LSV1 equ 1001
 
.data
DlgName		byte	"Hola",0
Heading1	byte	"Test1",0
Heading2	byte	"Test2",0
 
.data?
hInstance 	HINSTANCE	?
CommandLine LPSTR		?
 
.code
InsertColumn proc,
	hWnd:HWND
	LOCAL lvc:LV_COLUMN
	mov lvc.imask,LVCF_TEXT+LVCF_WIDTH
	mov lvc.pszText,offset Heading1
	mov lvc.lx,150
	invoke SendMessage,hWnd, LVM_INSERTCOLUMN,0,addr lvc
	or lvc.imask,LVCF_FMT
	mov lvc.fmt,LVCFMT_RIGHT
	mov lvc.pszText,offset Heading2
	mov lvc.lx,100
	invoke SendMessage,hWnd, LVM_INSERTCOLUMN, 1 ,addr lvc	
	ret		
InsertColumn endp
 
start:
invoke GetModuleHandle,NULL
mov hInstance,eax
invoke GetCommandLine
mov CommandLine,eax
invoke DialogBoxParam,hInstance,ADDR DlgName,NULL,ADDR DlgProc,NULL 
invoke ExitProcess,eax
DlgProc PROC hWnd:HWND,uMsg:UINT,wParam:WPARAM,lParam:LPARAM
	.IF uMsg == WM_INITDIALOG
		invoke InitCommonControls
		invoke GetDlgItem,hWnd,IDC_LSV1
		invoke InsertColumn,eax
;		invoke GetDlgItem,hWnd,IDC_FOCUS
;		invoke SetFocus,eax
	.ELSEIF uMsg == WM_CLOSE
		invoke EndDialog,hWnd,NULL
	.ELSE
		mov eax,FALSE
		ret
	.ENDIF
	mov eax,TRUE
	ret
DlgProc ENDP
END start