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9.3.1 Polymorphism Application

Step 1: Design the interface as shown in Figure 9.4.
Add class and named it as Operation.vb.
Step 2: Set the objects and properties as shown in

Table 9.5.
Step 3: Plan the event procedures as shown in

Table 9.6.
Step 4: Write the code
Step 5: Save and run the project.

Figure 9.4 Graphical User Interface

Figure 9.4 Polymorphism