How To Programmatically Change Network Password Under Windows 95, Windows 98, Windows Me

   //////////////////////////////////// 
   #include <windows.h>
   #include <stdio.h>
   #include "pwdspi.h"// Found in July 96 DDK otherwise define as follows

   #ifndef PS_SYNCMASTERPWD //if pwdspi.h is not present
   #define PS_SYNCMASTERPWD         0x03
   #define PS_SYNCMASTERPWD_OFF     0x00
   #define PS_SYNCMASTERPWD_ON      0x01

   // Function definition of PwdChangePassword and helper struct for
   // Windows 95. Helper structure (also found in pwdspi.h)
   typedef struct _CHANGEPWDINFO{
      LPTSTR lpUsername;
      LPTSTR lpPassword;
      DWORD cbPassword;
   } CHANGEPWDINFO, FAR *LPCHANGEPWDINFO;
   #endif

   // Function definitions:
   typedef DWORD
    (APIENTRY *LPPwdChangePassword)(LPCTSTR,HWND,DWORD,LPCHANGEPWDINFO);
   typedef DWORD (APIENTRY *LPPwdSetPasswordStatus)(LPCSTR,DWORD,DWORD);

   // Function to display error messages upon API failure
   void DisplayError(char *pszAPI);

   void main()
   {
   CHANGEPWDINFO   s = {NULL,NULL,0}; // initialize struct to empty.
   LPPwdChangePassword sPwdChangePassword;
   LPPwdSetPasswordStatus sPwdSetPasswordStatus;
   DWORD   res = 0;
   DWORD   cbUserName = 250;
   HINSTANCE   lib = LoadLibrary("MPR.DLL");

   if (lib == NULL)
        DisplayError("LoadLibrary");

   // To synchronize network provider password with windows password we
   // need to call PwdSetPasswordStatus. By synchronizing the network
   // provider password we avoid having to change each password separately.
   // Network providers listed in registry at:
   // HKLM/System\CurrentControlSet\Control\PwdProvider

   // Get address of PwdGetPasswordStatus
   sPwdSetPasswordStatus =
      (LPPwdSetPasswordStatus) GetProcAddress(lib,"PwdSetPasswordStatusA");
   if (sPwdSetPasswordStatus == NULL)
      DisplayError("GetProcAddress");

   res = sPwdSetPasswordStatus("MSNP32", // name of password provider
                               PS_SYNCMASTERPWD,
                               PS_SYNCMASTERPWD_ON
                               );
   if (res != WN_SUCCESS)
        DisplayError("PwdSetPasswordStatus");

   // Must get PwdChangePasswordA because in Windows 95 we are using the
   // ascii version of the exported function
   sPwdChangePassword =
      (LPPwdChangePassword) GetProcAddress(lib,"PwdChangePasswordA");

   // Call sPwdChangePassword specifying NULL as network provider.
   // This causes windows (non-network) password to be changed and hence
   // all synchronized passwords.
   res = sPwdChangePassword(    NULL, // Network provider
                                GetDesktopWindow(), //Window to own dialog
                                0,  // No special flag
                                &s  // Address of CHANGEPWDINFO structure
                                );
   if (res != WN_SUCCESS)
        DisplayError("PwdChangePassword");

   FreeLibrary(lib);
   printf("Password = %s\n",s.lpPassword);

   return;
   }

   void DisplayError(char *pszAPI)
   {
   LPVOID lpvMessageBuffer;

   FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM,
                 NULL, GetLastError(),
                 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
                 (LPTSTR)&lpvMessageBuffer, 0, NULL);

   //... now display this string
   printf("ERROR: API        = %s.\n", pszAPI);
   printf("       error code = %d.\n", GetLastError());
   printf("       message    = %s.\n", (char *)lpvMessageBuffer);

   // Free the buffer allocated by the system
   LocalFree(lpvMessageBuffer);
   ExitProcess(GetLastError());
   }