OllyDbg calls this optional function when user wants to terminate OllyDbg. All MDI windows created by plugin still exist. This is the best possibility to save plugin parameters to .ini file. Function must return 0 if it is safe to terminate OllyDbg. Any non-zero return will stop closing sequence. Do not misuse this possibility! Always inform user about the reasons why termination is not good and ask for his decision!
void ODBG_Pluginclose(void);
See also: ODBG_Plugindestroy, Pluginwriteinttoini, Pluginwritestringtoini