IMMDeviceCollection::GetCount method (mmdeviceapi.h)

The GetCount method retrieves a count of the devices in the device collection.

Syntax

HRESULT GetCount(
  [out] UINT *pcDevices
);

[out] pcDevices

Pointer to a UINT variable into which the method writes the number of devices in the device collection.

If the method succeeds, it returns S_OK. If it fails, possible return codes include, but are not limited to, the values shown in the following table.

Return code	Description
E_POINTER	Parameter pcDevices is NULL.

For a code example that calls the GetCount method, see Device Properties.

Requirement	Value
Minimum supported client	Windows Vista [desktop apps only]
Minimum supported server	Windows Server 2008 [desktop apps only]
Target Platform	Windows
Header	mmdeviceapi.h