RasGetAutodialParam function

The RasGetAutodialParam function retrieves the value of an AutoDial parameter.


DWORD RasGetAutodialParam(
  _In_    DWORD   dwKey,
  _Out_   LPVOID  lpvValue,
  _Inout_ LPDWORD lpdwcbValue


dwKey [in]

Specifies the AutoDial parameter to retrieve. This parameter can be one of the following values.


The lpvValue parameter returns a DWORD value. If this value is zero (the default), AutoDial displays a dialog box to query the user before creating a connection. If this value is 1, and the AutoDial database has the phone-book entry to dial, AutoDial creates a connection without displaying the dialog box.


The lpvValue parameter returns a DWORD value. If this value is 1, the system disables all AutoDial connections for the current logon session. If this value is zero (the default), AutoDial connections are enabled. The AutoDial system service changes this value to zero when a new user logs on to the workstation.


The lpvValue parameter returns a DWORD value that indicates the maximum number of addresses that AutoDial stores in the registry. AutoDial first stores addresses that it used to create an AutoDial connection; then it stores addresses that it learned after a RAS connection was created. Addresses written using the RasSetAutodialAddress function are always saved, and are not included in calculating the limit. The default value is 100.


The lpvValue parameter returns a DWORD value that indicates a time-out value, in seconds. When an AutoDial connection attempt fails, the AutoDial system service disables subsequent attempts to reach the same address for the time-out period. This prevents AutoDial from displaying multiple connection dialog boxes for the same logical request by an application. The default value is 5.


The lpvValue parameter points to a DWORD value that indicates a time-out value, in seconds. Before attempting an AutoDial connection, the system will display a dialog asking the user to confirm that the system should dial. The dialog has a countdown timer that terminates the dialog with a "Do not dial" selection if the user takes no action. The DWORD value pointed to by lpvValue specifies the initial time on this countdown timer.


lpvValue [out]

Pointer to a buffer that receives the value for the specified parameter.

lpdwcbValue [in, out]

Pointer to a DWORD value.

On input, set this value to indicate the size, in bytes, of the lpvValue buffer.

On output, this value indicates the actual size of the value written to the buffer.

Return value

If the function succeeds, the return value is ERROR_SUCCESS.

If the function fails, the return value is one of the following error codes or a value from Routing and Remote Access Error Codes or Winerror.h.


The dwKey or lpvValue parameter is invalid.


The size specified by the lpdwcbValue is too small.



Minimum supported client

Windows 2000 Professional [desktop apps only]

Minimum supported server

Windows 2000 Server [desktop apps only]







Unicode and ANSI names

RasGetAutodialParamW (Unicode) and RasGetAutodialParamA (ANSI)

See also

Remote Access Service (RAS) Overview
Remote Access Service Functions



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