Function Reference

_WinAPI_DefSubclassProc

Calls the next handler in a window's subclass chain

#include <WinAPIShellEx.au3>
_WinAPI_DefSubclassProc ( $hWnd, $iMsg, $wParam, $lParam )

Parameters

$hWnd Handle to the window being subclassed.

$iMsg The message to be sent.

$wParam The message-specific information.

$lParam The message-specific information.

Return Value

Returns the returned value specific to the message sent.

Remarks

The last handler in the subclass chain is the original window procedure for the specified window.
You do not need to call the default window procedure; this function calls it automatically.

_WinAPI_SetWindowSubclass

Example

#include "Extras\WMDebug.au3"
#include <GUIConstantsEx.au3>
#include <WinAPIShellEx.au3>
OnAutoItExitRegister ('OnAutoItExit')
; Create GUI
Global $g_hForm= GUICreate ('Test '&StringReplace (@ScriptName ,'.au3','()'))
; Register DLL callback that will be used as window subclass procedure
Global $g_hDll= DllCallbackRegister ('_SubclassProc','lresult','hwnd;uint;wparam;lparam;uint_ptr;dword_ptr')
Global $g_pDll= DllCallbackGetPtr ($g_hDll)
; Install window subclass callback
_WinAPI_SetWindowSubclass ($g_hForm,$g_pDll,1000,0)
GUISetState (@SW_SHOW )
Do
Until GUIGetMsg ()= $GUI_EVENT_CLOSE
Func  _SubclassProc($hWnd,$iMsg,$wParam,$lParam,$iID,$pData)
#forceref$iID,$pData
; Declared in WMDebug.au3
  _WM_Debug($hWnd,$iMsg,$wParam,$lParam)
Return _WinAPI_DefSubclassProc ($hWnd,$iMsg,$wParam,$lParam)
EndFunc ;==>_SubclassProc
Func  OnAutoItExit()
_WinAPI_RemoveWindowSubclass ($g_hForm,$g_pDll,1000)
DllCallbackFree ($g_hDll)
EndFunc ;==>OnAutoItExit