I work in an outpatient clinic and have an Access form in which I enter extensive patient information. All patients have a hospital chart # which is my primary key. Ideally I would like to have a button on my form which when pressed, would pull up a subform containing all of the appointments the individual patient has had in the past. I need to be able to enter an unlimited amount of dates for each patient. I am familiar with command buttons and have a basic understanding of making subforms. Could anyone give me some direction on how to go about making my appointment form?