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Error Codes

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All the interface methods in Windows Media Device Manager and service provider 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

Windows Media Device Manager error codes are as follows:

Return code Description
WMDM_E_BUFFERTOOSMALL The buffer supplied by the caller is too small. The client should increase the size of the buffer and retry the call.
WMDM_E_BUSY The device is busy and cannot satisfy the new request.
WMDM_E_CALL_OUT_OF_SEQUENCE Operations were called in the wrong order. (For example, calling Read without Open.)
WMDM_E_INCORRECT_APPSEC The minimum level of application security is not correct.
WMDM_E_CANTOPEN_PMSN_SERVICE_PIPE PMSN service pipe can not be opened.
WMDM_E_INCORRECT_RIGHTS The rights for a file are not correct.
WMDM_E_INTERFACEDEAD The object has disconnected itself from the clients.
WMDM_E_INVALIDTYPE The type is not valid.
WMDM_E_LICENSE_EXPIRED The license has expired.
WMDM_E_LICENSE_NOTEXIST The license does not exist.
WMDM_E_MAC_CHECK_FAILED The message authentication code check failed.
WMDM_E_MOREDATA There is more data.
WMDM_E_NORIGHTS The caller does not have rights for this operation.
WMDM_E_NOTCERTIFIED The caller is not authenticated to make this call.
WMDM_E_NOTSUPPORTED This operation is not supported.
WMDM_E_PROCESSFAILED The process failed.
WMDM_E_REVOKED The license has been revoked.
WMDM_E_SDMI_NOMORECOPIES No more copies can be made per SDMI compliance.
WMDM_E_SDMI_TRIGGER SDMI validation failed.
WMDM_E_TOO_MANY_SESSIONS Too many sessions exist.
WMDM_E_USER_CANCELLED The user cancelled the operation.

A service provider should refrain from returning generic failure codes, for example, E_FAIL. It should return as specific an error code as possible, so that if the error is propagated to an application, the application can give meaningful feedback to the user.

For errors in storage and device related operations, service providers should resort to Win32 error codes. Service providers can use HRESULT_FROM_WIN32 to convert Windows error codes to HRESULT values and use them as the return values. This macro and the error codes are defined in winerror.h which is a part of the Platform SDK.

Requirements

Header: Defined in wmdm.idl.

Library: mssachlp.lib

See Also