Edit

IMDServiceProvider::GetDeviceCount method (mswmdm.h)

  • Article

The GetDeviceCount method returns the number of installed physical or software devices that are currently attached and are known by the service provider.

Syntax

HRESULT GetDeviceCount(
  [out] DWORD *pdwCount
);

Parameters

[out] pdwCount

Pointer to a DWORD containing the count of known devices.

Return value

The method returns an HRESULT. All the interface methods in Windows Media Device Manager can return any of the following classes of error codes:

  • Standard COM error codes
  • Windows error codes converted to HRESULT values
  • Windows Media Device Manager error codes
For an extensive list of possible error codes, see Error Codes.

Remarks

The service provider should return only the number of supported devices that are currently attached to the computer.

This method must be implemented. It must not return WMDM_E_NOTSUPPORTED or E_NOTIMPL. For more information, see Mandatory and Optional Interfaces.

Requirements

Requirement Value
Target Platform Windows
Header mswmdm.h
Library Mssachlp.lib

See also

IMDServiceProvider Interface