idSession (ULONG) - input

The identifier of the session to be switched to the foreground.

The value specified must have been returned on a previous call to DosStartSession, except that a value of zero indicates switching the caller's session (that is, the parent session) to the foreground.

ulrc (APIRET) - returns

Return Code.

DosSelectSession returns one of the following values:

• NO_ERROR 224
  ERROR_SMG_NO_TARGET_WINDOW
  369
  ERROR_SMG_INVALID_SESSION_ID
  418
  ERROR_SMG_INVALID_CALL
  459
  ERROR_SMG_BAD_RESERVE
  460
  ERROR_SMG_PROCESS_NOT_PARENT
  463
  ERROR_SMG_RETRY_SUB_ALLOC

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