Function Reference

DllCallbackFree

Frees a previously created handle created with DllCallbackRegister.

DllCallbackFree ( handle )

Parameters

handle

The DllCallback handle, as returned by a previous call to DllCallbackRegister.

Return Value

None.

Remarks

If handle is invalid, an AutoIt runtime error will be thrown, and the script will terminate!
Upon termination, AutoIt automatically closes any handles it opened but calling DllCallbackFree is still a good idea.

Example

; Create callback function
$handle = DLLCallbackRegister ("_EnumWindowsProc", "int", "hwnd;lparam")

; Call EnumWindows
DllCall("user32.dll", "int", "EnumWindows", "ptr", DllCallbackGetPtr($handle), "lparam", 10)

; Delete callback function
DllCallbackFree($handle)

; Callback Procedure
Func _EnumWindowsProc($hWnd, $lParam)
If WinGetTitle($hWnd) <> "" And BitAnd(WinGetState($hWnd), 2) Then
$res = MsgBox(1, WinGetTitle($hWnd), "$hWnd=" & $hWnd & @CRLF & "lParam=" & $lParam & @CRLF & "$hWnd(type)=" & VarGetType($hWnd))
If $res = 2 Then Return 0 ; Cancel clicked, return 0 to stop enumeration
EndIf
Return 1 ; Return 1 to continue enumeration
EndFunc