IAMExtDevice::get_DevicePort method (strmif.h)
[The feature associated with this page, DirectShow, is a legacy feature. It has been superseded by MediaPlayer, IMFMediaEngine, and Audio/Video Capture in Media Foundation. Those features have been optimized for Windows 10 and Windows 11. Microsoft strongly recommends that new code use MediaPlayer, IMFMediaEngine and Audio/Video Capture in Media Foundation instead of DirectShow, when possible. Microsoft suggests that existing code that uses the legacy APIs be rewritten to use the new APIs if possible.]
The get_DevicePort method retrieves the communication port to which the external device is connected.
Syntax
HRESULT get_DevicePort(
[out] long *pDevicePort
);
Parameters
[out] pDevicePort
Pointer to a long integer that receives one of the following values, indicating the port to which the device is connected:
| Value | Description |
|---|---|
| DEV_PORT_1394 | IEEE 1394 Bus |
| DEV_PORT_ARTI | ARTI driver |
| DEV_PORT_COM1 | COM1 |
| DEV_PORT_COM2 | COM2 |
| DEV_PORT_COM3 | COM3 |
| DEV_PORT_COM4 | COM4 |
| DEV_PORT_DIAQ | Diaquest driver |
| DEV_PORT_SIM | Simulation port |
| DEV_PORT_USB | Universal Serial Bus |
Return value
When this method succeeds, it returns S_OK. Otherwise it returns an HRESULT error code.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | strmif.h (include Dshow.h) |
| Library | Strmiids.lib |