RasDeleteEntryA function (ras.h)
The RasDeleteEntry function deletes an entry from a phone book.
Syntax
DWORD RasDeleteEntryA(
[in] LPCSTR unnamedParam1,
[in] LPCSTR unnamedParam2
);
Parameters
[in] unnamedParam1
Pointer to a null-terminated string that specifies the full path and file name of a phone-book (PBK) file. If this parameter is NULL, the function uses the current default phone-book file. The default phone-book file is the one selected by the user in the User Preferences property sheet of the Dial-Up Networking dialog box.
Windows Me/98/95: This parameter should always be NULL. Dial-up networking stores phone-book entries in the registry rather than in a phone-book file.
[in] unnamedParam2
Pointer to a null-terminated string that specifies the name of an existing entry to be deleted.
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.
| Value | Meaning |
|---|---|
|
The user does not have correct privileges. Only an administrator can complete this task. |
|
The entry name specified in lpszEntry does not exist. |
Remarks
The following sample code deletes the phone-book entry specified by the variable lpszEntry.
#include <stdio.h>
#include <windows.h>
#include "ras.h"
#include "strsafe.h"
#define PHONE_NUMBER_LENGTH 7
#define DEVICE_NAME_LENGTH 5
#define DEVICE_TYPE_LENGTH 5
DWORD __cdecl wmain(){
DWORD dwRet = ERROR_SUCCESS;
LPTSTR lpszEntry = L"RASEntryName";
LPTSTR lpszphonenumber = L"5555555";
LPTSTR lpszdevicename = L"Modem";
LPTSTR lpszdevicetype = RASDT_Modem;
// Allocate heap memory for the RASENTRY structure
LPRASENTRY lpentry = (LPRASENTRY)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(RASENTRY));
if (lpentry == NULL){
printf("HeapAlloc failed");
return 0;
}
// The RASENTRY->dwSize member has to be initialized or the RRAS APIs will fail below.
lpentry->dwSize = sizeof(RASENTRY);
lpentry->dwFramingProtocol = RASFP_Ppp;
lpentry->dwfOptions = 0;
lpentry->dwType = RASET_Phone;
dwRet |= StringCchCopyN(lpentry->szLocalPhoneNumber, RAS_MaxPhoneNumber, lpszphonenumber, PHONE_NUMBER_LENGTH);
dwRet |= StringCchCopyN(lpentry->szDeviceName, RAS_MaxDeviceName, lpszdevicename, DEVICE_NAME_LENGTH);
dwRet |= StringCchCopyN(lpentry->szDeviceType, RAS_MaxDeviceType, lpszdevicetype, DEVICE_TYPE_LENGTH);
if (dwRet != ERROR_SUCCESS){
wprintf(L"RASENTRY structure initialization failed");
HeapFree(GetProcessHeap(), 0, lpentry);
return 0;
}
// Validate the new entry's name
dwRet = RasValidateEntryName(NULL, lpszEntry);
if (dwRet != ERROR_SUCCESS){
wprintf(L"RasValidateEntryName failed: Error = %d\n", dwRet);
HeapFree(GetProcessHeap(), 0, lpentry);
return 0;
}
// Create and set the new entry's properties
dwRet = RasSetEntryProperties(NULL, lpszEntry, lpentry, lpentry->dwSize, NULL, 0);
if (dwRet != ERROR_SUCCESS){
wprintf(L"RasSetEntryProperties failed: Error = %d\n", dwRet);
HeapFree(GetProcessHeap(), 0, lpentry);
return 0;
}
// Clean up: delete the new entry
dwRet = RasDeleteEntry(NULL, lpszEntry);
if (dwRet != ERROR_SUCCESS){
wprintf(L"RasDeleteEntry failed: Error = %d\n", dwRet);
}
HeapFree(GetProcessHeap(), 0, lpentry);
return 0;
}
Note
The ras.h header defines RasDeleteEntry as an alias which automatically selects the ANSI or Unicode version of this function based on the definition of the UNICODE preprocessor constant. Mixing usage of the encoding-neutral alias with code that not encoding-neutral can lead to mismatches that result in compilation or runtime errors. For more information, see Conventions for Function Prototypes.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 2000 Professional [desktop apps only] |
| Minimum supported server | Windows 2000 Server [desktop apps only] |
| Target Platform | Windows |
| Header | ras.h |
| Library | Rasapi32.lib |
| DLL | Rasapi32.dll |