IPin::QueryDirection
A version of this page is also available for
4/8/2010
This method retrieves the direction for this pin.
Syntax
HRESULT QueryDirection(
PIN_DIRECTION* pPinDir
);
Parameters
- pPinDir
[out] Pointer to a PIN_DIRECTION variable.
Return Value
Returns an HRESULT value that depends on the implementation.
HRESULT can be one of the following standard constants, or other values not listed.
| Value | Description |
|---|---|
E_FAIL |
Failure. |
E_POINTER |
Null pointer argument. |
E_INVALIDARG |
Invalid argument. |
E_NOTIMPL |
Method is not supported. |
S_OK or NOERROR |
Success. |
Remarks
The returned pPinDir parameter will contain PINDIR_INPUT if the pin is an input pin or PINDIR_OUTPUT otherwise.
The same information is available by using IPin::QueryPinInfo, but this method is more direct and more efficient.
Requirements
| Windows Embedded CE | Windows CE 2.12 and later |
| Windows Mobile | Pocket PC for Windows Mobile Version 5.0 and later, Smartphone for Windows Mobile Version 5.0 and later |
| Note | Microsoft DirectShow applications and DirectShow filters have different include file and Library requirements For more information, see Setting Up the Build Environment, Version 2.12 requires DXPAK 1.0 or later |