UTF8\ASCII\UNICODE转换

wchar_t * ANSIToUnicode( const char* str )
{
int    textlen ;
wchar_t * result;
textlen = MultiByteToWideChar( CP_ACP, 0, str,-1,    NULL,0 );  
result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));  
memset(result,0,(textlen+1)*sizeof(wchar_t));  
MultiByteToWideChar(CP_ACP, 0,str,-1,(LPWSTR)result,textlen );  
return    result;  
}
char * UnicodeToANSI( const wchar_t *str )
{
char * result;
int textlen;
// wide char to multi char
textlen = WideCharToMultiByte( CP_ACP,    0,    str,    -1,    NULL, 0, NULL, NULL );
result =(char *)malloc((textlen+1)*sizeof(char));
memset( result, 0, sizeof(char) * ( textlen + 1 ) );
WideCharToMultiByte( CP_ACP, 0, str, -1, result, textlen, NULL, NULL );
return result;
}
wchar_t * UTF8ToUnicode( const char* str )
{
int    textlen ;
wchar_t * result;
textlen = MultiByteToWideChar( CP_UTF8, 0, str,-1,    NULL,0 );  
result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));  
memset(result,0,(textlen+1)*sizeof(wchar_t));  
MultiByteToWideChar(CP_UTF8, 0,str,-1,(LPWSTR)result,textlen );  
return    result;  
}
char * UnicodeToUTF8( const wchar_t *str )
{
char * result;
int textlen;
// wide char to multi char
textlen = WideCharToMultiByte( CP_UTF8,    0,    str,    -1,    NULL, 0, NULL, NULL );
result =(char *)malloc((textlen+1)*sizeof(char));
memset(result, 0, sizeof(char) * ( textlen + 1 ) );
WideCharToMultiByte( CP_UTF8, 0, str, -1, result, textlen, NULL, NULL );
return result;
}