ASM Community

I have registered two window classes. One main window and one childwindow. Not MDI windows. Do anybody know why the child not is showing up?
Here is the code.

;Main window
mov   wc.cbSize,SIZEOF WNDCLASSEX
mov   wc.style, CS_BYTEALIGNWINDOW
mov   wc.lpfnWndProc, offset WndProc
mov   wc.cbClsExtra,NULL
mov   wc.cbWndExtra,NULL
push  hInstance
pop   wc.hInstance
mov   wc.hbrBackground,COLOR_WINDOW+1
mov   wc.lpszMenuName,IDC_MAINMENU
mov   wc.lpszClassName,offset szMainClass

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
invoke CreateWindowEx,WS_EX_CLIENTEDGE,addr szClassName,addr szAppName,\
		WS_OVERLAPPEDWINDOW or WS_CLIPSIBLINGS or WS_CLIPCHILDREN,\
       	CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInst,NULL
mov hwnd,eax

;Child window
mov   wc.cbSize,SIZEOF WNDCLASSEX
mov   wc.style, CS_HREDRAW
mov   wc.lpfnWndProc, offset ChildProc
mov   wc.cbClsExtra,NULL
mov   wc.cbWndExtra,NULL
push  hInstance
pop   wc.hInstance
mov   wc.hbrBackground,COLOR_BTNFACE+1
mov   wc.lpszMenuName,NULL
mov   wc.lpszClassName,offset szChildClass

invoke LoadCursor,NULL,IDC_ARROW
mov   wc.hCursor,eax

invoke RegisterClassEx, addr wc

This is the main window process

.if uMsg==WM_CREATE
	invoke CreateWindowEx,NULL,addr szChildClass,0,\
           WS_VISIBLE or WS_CHILD or WS_CLIPCHILDREN,0,0,500,300,hWnd,NULL,hInstance,NULL