* then close it using close_settings_w(). At the end of this call
* sequence the settings should have been written to the PuTTY
* persistent storage area.
+ *
+ * A given key will be written at most once while saving a session.
+ * Keys may be up to 255 characters long. String values have no length
+ * limit.
*/
void *open_settings_w(char *sessionname);
void write_setting_s(void *handle, char *key, char *value);