Invoke method on COM object or interface, or display methods
S = invoke(h)
S = invoke(h,'methodname')
S = invoke(h,'methodname',arg1,arg2,...)
S = invoke(h,'custominterfacename')
S = invoke(h) returns structure array, S,
containing a list of all methods supported by the object or interface, h,
along with the prototypes for these methods. If S is
empty, either there are no properties or methods in the object, or MATLAB® cannot
read the object type library. Refer to the COM vendor documentation.
S = invoke(h,'methodname') invokes the
method specified by methodname, and returns an
output value, if any, in S. The data type of the
return value depends on the invoked method, which is determined by
the control or server.
S = invoke(h,'methodname',arg1,arg2,...) invokes
the method specified by methodname with input arguments arg1,arg2,....
S = invoke(h,'custominterfacename') returns
an Interface object S, which
is a handle to a custom interface implemented by the COM component.
The h argument is a handle to the COM object. The custominterfacename argument
is returned by the interfaces function.
If the method returns a COM interface, then the invoke function
returns a new MATLAB COM object that represents the interface
returned. For a description of how MATLAB converts COM types,
see Handle COM Data in MATLAB.
COM functions are available on Microsoft® Windows® systems only.
Invoke the Redraw method in the mwsamp control.
f = figure('position',[100 200 200 200]); h = actxcontrol('mwsamp.mwsampctrl.1',[0 0 200 200],f); h.Radius = 100; invoke(h,'Redraw')
Alternatively, call the method directly.
Redraw(h)
Display all mwsamp methods.
invoke(h)
ans =
AboutBox = void AboutBox(handle)
Beep = void Beep(handle)
FireClickEvent = void FireClickEvent(handle)
.
.Once you have created a COM server, you can query the server
component to see if any custom interfaces are implemented. Use the interfaces function
to return a list of all available custom interfaces:
h = actxserver('mytestenv.calculator');
customlist = interfaces(h)
customlist = ICalc1 ICalc2 ICalc3
To get a handle to the custom interface you want, use the invoke function.
c1 = invoke(h,'ICalc1')
c1 = Interface.Calc_1.0_Type_Library.ICalc_Interface
Use this handle with COM client functions to access the properties and methods of the object through the selected custom interface.