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    Blocks Button

                                                                                              Backpack
                          Built-in Blocks

                           Components                                       Workspace
                              Blocks

                                                                                                 Trash

                     Following are the main parts of the Block Editor:

                       Built-in Blocks: It contains all the predefined blocks in the application. They are responsible for
                       handling operations like Math, Text, Logic and Control.
                       Component Blocks: It contains relevant blocks for the components we have added in the Design

                       window.
                       Workspace: It arranges all the blocks for coding in the workspace.

                       Trash: It is used for deleting blocks that are not required.
                       Backpack: It stores the copy of all the blocks even when we exit App Inventor.

                     Making Click Event for Button

                       2  Drag and drop When
                       Talking_Me.Click do block
                       on the workspace.

                             1  Click on the
                             Talking_Me button.

                     This is an Event Handler block that will handle what happens when the button on your app is
                     clicked.

                                                                                                Developing Mobile Apps  59

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