VCOM:IVWUnknown
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What is this?
This interface gives the fundamental capability of an interface to participate in VectorWorks' VCOM:VCOM (VectorWorks Component Object Model).
An interface is a VCOM interface if it inherits directly or indirectly this base interface class.
// ---------------------------------------------------------------------------------------------------
// Base interface for all interfaces in VCOM
class IVWUnknown
{
public:
virtual ~IVWUnknown( void ) {}
virtual long VCOM_CALLTYPE AddRef() = 0;
virtual long VCOM_CALLTYPE Release() = 0;
};
Note The empty destructor is necessary to satisfy the XCode Mac compiler. Otherwise it producess tons of warnings.
Every VCOM interface is recognized by the VectorWorks by it's VCOM:VWIID. This means that each interface should have one VCOM:VWIID defined.
Note Some interface doesn't have VCOM:VWIID defined. This is in purpose because they are not ment to be queried (SDK:GS_VWQueryInterface or VCOM:VCOMPtr) They are obtained through another VCOM interface that has 'get' or 'query' function.
Sample
// --------------------------------------------------------------------------------------------------
// {B5706042-BF87-4cff-9BD9-3A08B01C183C}
static const VWIID IID_VCOMSample = { 0xb5706042, 0xbf87, 0x4cff, { 0x9b, 0xd9, 0x3a, 0x8, 0xb0, 0x1c, 0x18, 0x3c } };
class IVCOMSample : public IVWUnknown
{
public:
virtual VCOMError VCOM_CALLTYPE Function() = 0;
};