Assembly code snippets

Details

Title	New CenterWindow
Author	Joshua
Submitted by:	Joshua
Date added:	2003-12-13 03:09:26
Date modified:	2003-12-13 03:51:29

Comments

New version of CenterWindow originally by QvasiModo
Centers a window relative to it's owner window.
Tipically used to center a dialog box to it's parent window, or a main window to the desktop.

Size 79 bytes (QvasiModo's: 112 bytes)

Snippet

; CenterWindow
;   original by QvasiModo
;   new version by Joshua

; Centers a window relative to it's owner window.
; Tipically used to center a dialog box to it's parent window, or a main window to the desktop.

CenterWindow proto :dword

.code
option prologue:none
option epilogue:none
CenterWindow proc hwnd:dword
    push ebx
    push esi
    mov esi,[esp+12]
    push 1
    sub esp,16
    push esp
    push esi
    call GetWindowRect
    pop eax
    pop ecx
    sub [esp],eax
    sub [esp+4],ecx
    push GW_OWNER
    push esi
    call GetWindow
    sub esp,16
    push esp
    push eax
    call GetWindowRect
    pop ebx
    pop edx
    pop eax
    pop ecx
    add eax,ebx
    add ecx,edx
    sub eax,[esp]
    sub ecx,[esp+4]
    sar eax,1
    sar ecx,1
    push ecx
    push eax
    push esi
    call MoveWindow
    pop esi
    pop ebx
    ret
CenterWindow endp
option prologue:PrologueDef
option epilogue:EpilogueDef