Once the active window has been identified, it is necessary to determine the last user action before the error occurred. The name of the last menu bar or pulldown menu item, button or icon selected should be noted for documentation of the problem.
Step #2: Identify the last user action before the error occurred, and record the name of the menu bar or pulldown menu item, button or icon.
Identification of the last user action provides the initial location, within the window procedure for the active window, at which to begin searching for the problem. The problem is likely to be within the scope of processing for the message resulting from this action, or within that of another message generated during the processing of this action.