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Revision as of 16:45, 11 May 2012 by WYu (talk | contribs) (Initial documentation on COM.IDispatch)
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Class (inherits from IUnknown)

IDispatch is the common interface exposed by automation servers (like Internet Explorer, Word, Excel, etc.). For automation servers that support dual interfaces you can use the OLEObject class to automate them.

GetIDofName Invoke


The following automates Internet Explorer and queries for a specific interface (each interface is identified by a unique IID)

Dim ie As New OLEObject("InternetExplorer.Application")
ie.Visible = True

Dim unk As New COM.IUnknown(ie.Handle)

// Query for the IID_IWebBrowser2 interface
Dim iid As MemoryBlock = COM.IIDFromString("{D30C1661-CDAF-11D0-8A3E-00C04FC9E26E}")
Dim out As Ptr
If 0 = unk.QueryInterface(iid, out) Then
// Yay this interface exists
End If

See Also

COM module; IDispatch, IEnumVARIANT, IPicture.