Expotential

I am working on a program that requires registration of a username however I do not want users to be able to register usernames with any symbols or spaces only letters and numbers. I honestly dont know where to start on this. Thanks.

alternatively if you are going to have an "Edit" menu set the "Select all" to be bound to 'Ctrl A' and place lines 1-6 of the above answer.

I am currently trying to set up a server winsock but the problem is even after certain clients have disconnected from the server, the server trys to send data to those disconnected clients causing either a server side runtime error or preventing further clients to connect(or the same client to …

I am trying to remove a list item in a listbox... the problem is I have to remove it by the what is visible to the user the program doesnt keep record of the index number in the listbox so we have the following in a list box Bob Fred …