Warning: This feature is experimental. It may not work, may contain bugs or may be changed or removed without notice.


Function Reference


Creates a reference to an object from the given classname/object pointer, interface identifier and description string.

ObjCreateInterface ( "CLSID" , "IID" [, "interface_description",[flag = True]] )


CLSID Class identifier or object pointer. If this is a class identifier it can be in either ProgID or the string representation of the CLSID.
IID String representation of interface identifier.
interface_description [optional] String describing v-table of the object. Use keyword Default to access IDispatch for dual interfaces.
flag [optional] Default value is True meaning the object interface inherits from IUnknown.

Return Value

Success: an object.
Failure: sets the @error flag to non-zero.


ObjCreateInterface() creates objects with methods that are listed in interface-description string.
For COM objects (IUnknown based) first three methods are always QueryInterface, AddRef and Release. Don't specify them inside the description strings.

Methods listed inside description string must be in v-table order of the interface. If you provide an invalid or incorrect description AutoIt may become unstable or crash.

Format of the description string is:
$sTagInterface = "MethodName1 RetType(ParamType1;ParamType2;...); MethodName2 RetType(..."

By default, AutoIt uses the 'stdcall' calling convention for COM. To use the 'cdecl' place ':cdecl' after the return type.

Valid Types are:

Type Details
none no value (only valid for return type - equivalent to void in C)
byte an unsigned 8 bit integer
boolean an unsigned 8 bit integer
short a 16 bit integer
word, ushort an unsigned 16 bit integer
int, long a 32 bit integer
bool a 32 bit integer
dword, ulong, uint an unsigned 32 bit integer
hresult a 32 bit integer
int64 a 64 bit integer
uint64 an unsigned 64 bit integer
ptr a general pointer (void *)
hwnd a window handle (pointer)
handle an handle (pointer)
float a single precision floating point number
double a double precision floating point number
int_ptr, long_ptr, lresult, lparam an integer big enough to hold a pointer when running on x86 or x64 versions of AutoIt.
uint_ptr, ulong_ptr, dword_ptr, wparam an unsigned integer big enough to hold a pointer when running on x86 or x64 versions of AutoIt.
str an ANSI string (a minimum of 65536 chars is allocated).
wstr a UNICODE wide character string (a minimum of 65536 chars is allocated).
bstr a composite data type that consists of a length prefix, a data string and a terminator
variant a tagged union that can be used to represent any other data type
idispatch, object a composite data type that represents object with IDispatch interface
clsid 128-bit integer in form of GUID string
struct structure created with DllStructCreate()
* Add * to the end of another type to pass it by reference. For example "int*" passes a pointer to an "int" type.

See the Obj/COM Reference for more information about Objects.




#include <MsgBoxConstants.au3>


Func Example()
    ; Declare the CLSID, IID and interface description for ITaskbarList.
    ; It is not necessary to describe the members of IUnknown.
    Local Const $sCLSID_TaskbarList = "{56FDF344-FD6D-11D0-958A-006097C9A090}"
    Local Const $sIID_ITaskbarList = "{56FDF342-FD6D-11D0-958A-006097C9A090}"
    Local Const $sTagITaskbarList = "HrInit hresult(); AddTab hresult(hwnd); DeleteTab hresult(hwnd); ActivateTab hresult(hwnd); SetActiveAlt hresult(hwnd);"

    ; Create the object.
    Local $oTaskbarList = ObjCreateInterface($sCLSID_TaskbarList, $sIID_ITaskbarList, $sTagITaskbarList)

    ; Initialize the iTaskbarList object.

    ; Run Notepad.

    ; Wait for the Notepad window to appear and get a handle to it.
    Local $hNotepad = WinWait("[CLASS:Notepad]")

    ; Tell the user what to look for.
    MsgBox($MB_SYSTEMMODAL, "", "Look in the Taskbar and you should see an entry for Notepad." & @CRLF & @CRLF & "Press OK to continue.")

    ; Delete the Notepad entry from the Taskbar.

    ; Tell the user to look again.
    MsgBox($MB_SYSTEMMODAL, "", "Look in the Taskbar.  There should no longer be a Notepad entry but Notepad is still running." & @CRLF & @CRLF & "Press OK to continue.")

    ; Close Notepad.
EndFunc   ;==>Example