CreateTransform method

Creates and initializes a transform.

Syntax

Copy 

HRESULT retVal = object.CreateTransform(punkInputs, ulNumInputs, punkOutputs, ulNumOutputs, pInitProps, pErrLog, TransCLSID, TransIID, ppTransform);

Parameters

punkInputs [in]

Type: IUnknown

Address of a pointer to an array of input data object interface pointers that the transform will use. Specify NULL if the transform does not use any inputs.

ulNumInputs [in]

Type: unsigned long

Number of data objects referred to by the punkInputs parameter. Can be zero if the transform does not use any inputs.

punkOutputs [in]

Type: IUnknown

Address of a pointer to an array of output data object interface pointers. Can be NULL.

ulNumOutputs [in]

Type: unsigned long

Number of data objects referred to by the punkOutputs parameter.

pInitProps [in]

Type: IPropertyBag

Pointer to an optional property bag used to initialize the transform. Can be NULL.

pErrLog [in]

Type: IErrorLog

Pointer to an optional error log object used during property persistence. Can be NULL.

TransCLSID [in]

Type: REFCLSID

CLSID of the transform to create.

TransIID [in]

Type: REFIID

IID of the transform type to return.

ppTransform [out]

Type: void

Address of a pointer to the requested interface from the new transform.

Remarks

If the number of inputs and outputs is set to zero, this method will not use IDXTransform::Setup on the transform. This enables you to create a transform and defer setup until a later time.

 

 

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