Lab Assignment 7 For this project, you'll develop an application that lets the user perform conversion calculations.

Lab Assignment 7

For this project, you'll develop an application that lets the user perform conversion calculations. This application requires a parent form that includes both a menu and a toolbar, a child form that lets the user calculate conversions, and two additional forms. It also uses two text files, an XML file, two business classes, and two database classes.

Operation

• To display an instance of the Conversion form, the user selects the New Conversion command from the File menu or clicks the New button in the toolbar.

• To switch to an open Conversion form, the user clicks the form or selects the form from the Window menu.

• To close the active Conversion form, the user clicks the Close button or selects the Close command from the File menu.

• To change the conversion options, the user clicks the Options button in the toolbar or selects the Options command from the Tools menu to display the Options dialog box.

• To arrange the open Conversion forms within the parent form, the user selects the Cascade, Tile Vertical, or Tile Horizontal command from the Window menu.

• To perform a conversion, the user selects the conversion to be performed from the combo box list and the application modifies the labels that indicate the "from" and "to" lengths accordingly. Then, the user enters the "from" length and clicks the Calculate button.

Operation

• To change the conversion that's displayed by default when a Conversion form is opened, the user

selects the conversion from the Default Conversion combo box.

• To determine whether or not the toolbar is displayed, the user checks or unchecks the Show Toolbar

option.

• To remove a conversion so it's not included in any new Conversion forms that are opened, the user

selects the conversion in the list and then clicks the Remove button.

• To add a conversion to any new Conversion forms that are opened, the user clicks the Add button to

display the Add Conversion dialog box.

• To restore the default options, the user clicks the Restore Defaults button.

• To save all the changes made to the options, the user clicks the OK button. To cancel the changes, the

user clicks the Cancel button.

Operation

• To add a conversion, the user enters unit descriptions in the From and To text boxes and a multiplier

that indicates the number of To units in a From unit in the Multiplier text box, and then clicks the OK

button.

Specifications

• All user entries should be checked to be sure they're valid.

• When the application starts, the parent form should do the following: