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This property returns the minimum number of pins that the pin factory must instantiate before the filter can perform I/O operations.
Usage Summary Table
| Get | Set | Target | Property Descriptor Type | Property Value Type |
|---|---|---|---|---|
| Yes | No | Pin | KSP_PIN | ULONG |
Remarks
Specify this property using KSP_PIN, where the member specifies the relevant pin factory.
KSPROPERTY_PIN_NECESSARYINSTANCES returns a value of type ULONG, specifying the minimum number of pins that the pin factory must instantiate.
The class driver does not handle this property; the stream minidriver must provide handling on its own.
Requirements
Header: ks.h (include Ks.h)