PCMETHOD_REQUEST structure (portcls.h)
The PCMETHOD_REQUEST structure specifies a method request.
Syntax
typedef struct _PCMETHOD_REQUEST {
PUNKNOWN MajorTarget;
PUNKNOWN MinorTarget;
ULONG Node;
const PCMETHOD_ITEM *MethodItem;
ULONG Verb;
} PCMETHOD_REQUEST, *PPCMETHOD_REQUEST;
Members
MajorTarget
Pointer to the IUnknown interface of a miniport object that supports the method set and method specified by MethodItem.
MinorTarget
Pointer to an IUnknown interface of a stream object associated with MajorTarget. If the request does not specify a minor target, set this member to NULL.
Node
Specifies the node ID of the target node for the request. If the target is not a node, this member is set to ULONG(-1).
MethodItem
Pointer to a PCMETHOD_ITEM structure that describes a method supported by a filter, pin, or node.
Verb
Specifies the type of method request. This member can be set to the bitwise OR of one or more of the flag bits in the following table.
| Flag bit | Meaning |
|---|---|
| PCMETHOD_ITEM_FLAG_BASICSUPPORT | Returns basic support information about the method specified by MethodItem->Id. |
| PCMETHOD_ITEM_FLAG_SEND | Executes the method specified by MethodItem->Id. The client should conform to the basic-support information for the method. |
| PCMETHOD_ITEM_FLAG_SETSUPPORT | Returns information about support for the method set specified by MethodItem->Set. |
Remarks
This is the structure that the port driver passes to the miniport driver's method-handler routine. The PCMETHOD_ITEM structure contains a pointer to a method handler that takes a PCMETHOD_REQUEST pointer as its single call parameter.
The WDM audio subsystem does not currently support method requests.
Requirements
| Requirement | Value |
|---|---|
| Header | portcls.h (include Portcls.h) |