如何恢复默认图标?(WinXP和Win7）

http://msdn.microsoft.com/en-us/library/windows/desktop/ms648045%28v=vs.85%29.aspx

告诉我：

如果hinst参数为NULL，fuLoad参数省略LR_LOADFROMFILE值，则lpszName指定要加载的OEM映像。OEM映像标识符在Winuser.h中定义，并具有以下前缀。

但我很难弄清楚。

我正在尝试，但它在var hIconBig = LoadImage...和var hIconSmall = LoadImage...行上抛出了各种错误。

Cu.import('resource://gre/modules/ctypes.jsm');
var user32 = ctypes.open('user32.dll');
var SendMessage = user32.declare('SendMessageW', ctypes.winapi_abi, ctypes.uintptr_t, ctypes.int32_t, ctypes.unsigned_int, ctypes.int32_t, ctypes.voidptr_t );
var LoadImage = user32.declare('LoadImageA', ctypes.winapi_abi, ctypes.voidptr_t, ctypes.int, ctypes.char.ptr, ctypes.unsigned_int, ctypes.int, ctypes.int, ctypes.unsigned_int);
var IMAGE_BITMAP = 0;
var IMAGE_ICON = 1;
var LR_LOADFROMFILE = 16;
var basewindow = window.QueryInterface(Ci.nsIInterfaceRequestor).getInterface(Ci.nsIWebNavigation).QueryInterface(Ci.nsIDocShellTreeItem).treeOwner.QueryInterface(Ci.nsIInterfaceRequestor).nsIBaseWindow;
var nativeHandle = basewindow.nativeHandle;
var targetWindow_handle = parseInt(nativeHandle);
var hIconBig = LoadImage(null, 'C:\Documents and Settings\SONY VAIO\My Documents\Downloads\puzzle.ico', IMAGE_ICON, 256, 256);
var hIconSmall = LoadImage(null, 'C:\Documents and Settings\SONY VAIO\My Documents\Downloads\puzzle.ico', IMAGE_ICON, 16, 16);
var successSmall = SendMessage(targetWindow_handle, 0x0080 /** WM_SETICON **/ , 0 /** ICON_SMALL **/ , hIconSmall);
var successBig = SendMessage(targetWindow_handle, 0x0080 /** WM_SETICON **/ , 1 /** ICON_BIG **/ , hIconBig);
var me = Services.wm.getMostRecentWindow(null);
me.alert(successSmall);
me.alert(successBig);
user32.close();