Can anybody tell me how to control the main form. I want to make the main form appear depending on a check that i am going to make. For example when running the exe, i need to check first if the username and password is already present in the Registry. If it is present then i wont show the login. If the login is not correct, i shouldn't get the main form but the login again.In which event of the main form should i do this check so as to make the main form appear depending on the result of this check?