// ConnectObject creates a connection point between two services for communication.
func ConnectObject(disp *ole.IDispatch, iid *ole.GUID, idisp interface{}) (cookie uint32, err error) {
unknown, err := disp.QueryInterface(ole.IID_IConnectionPointContainer)
if err != nil {
return
}
container := (*ole.IConnectionPointContainer)(unsafe.Pointer(unknown))
var point *ole.IConnectionPoint
err = container.FindConnectionPoint(iid, &point)
if err != nil {
return
}
if edisp, ok := idisp.(*ole.IUnknown); ok {
cookie, err = point.Advise(edisp)
container.Release()
if err != nil {
return
}
}
rv := reflect.ValueOf(disp).Elem()
if rv.Type().Kind() == reflect.Struct {
dest := &stdDispatch{}
dest.lpVtbl = &stdDispatchVtbl{}
dest.lpVtbl.pQueryInterface = syscall.NewCallback(dispQueryInterface)
dest.lpVtbl.pAddRef = syscall.NewCallback(dispAddRef)
dest.lpVtbl.pRelease = syscall.NewCallback(dispRelease)
dest.lpVtbl.pGetTypeInfoCount = syscall.NewCallback(dispGetTypeInfoCount)
dest.lpVtbl.pGetTypeInfo = syscall.NewCallback(dispGetTypeInfo)
dest.lpVtbl.pGetIDsOfNames = syscall.NewCallback(dispGetIDsOfNames)
dest.lpVtbl.pInvoke = syscall.NewCallback(dispInvoke)
dest.iface = disp
dest.iid = iid
cookie, err = point.Advise((*ole.IUnknown)(unsafe.Pointer(dest)))
container.Release()
if err != nil {
point.Release()
return
}
}
container.Release()
return 0, ole.NewError(ole.E_INVALIDARG)
}
// GetProperty retrieves property from IDispatch.
func GetProperty(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
var dispid []int32
dispid, err = disp.GetIDsOfName([]string{name})
if err != nil {
return
}
if len(params) < 1 {
result, err = disp.Invoke(dispid[0], ole.DISPATCH_PROPERTYGET)
} else {
result, err = disp.Invoke(dispid[0], ole.DISPATCH_PROPERTYGET, params...)
}
return
}
// CallMethod calls method on IDispatch with parameters.
func CallMethod(disp *ole.IDispatch, name string, params ...interface{}) (result *ole.VARIANT, err error) {
var dispid []int32
dispid, err = disp.GetIDsOfName([]string{name})
if err != nil {
return
}
if len(params) < 1 {
result, err = disp.Invoke(dispid[0], ole.DISPATCH_METHOD)
} else {
result, err = disp.Invoke(dispid[0], ole.DISPATCH_METHOD, params...)
}
return
}