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CHAPTER 5 INTRODUCING VISUAL BASIC AND THE .NET FRAMEWORK
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Figure 5-7. Object Browser
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14. The Object Browser enables you to explore the object hierarchies and to view information about items and methods within the hierarchy. Take some time to explore the Object Browser. When you are finished, close the Object Browser and close the Class View window.
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Exploring the Toolbox and Properties Window
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To explore the VS Toolbox and Properties window, follow these steps: 1. In the Solution Explorer window, double-click the Form1.vb node. This brings up the Form1 design tab in the main editing window. Locate the Toolbox tab to the left of the main editing window. Hover the cursor over the tab, and the Toolbox window should expand, as shown in Figure 5-8. In the upper-right corner of the Toolbox, you should see the Auto Hide icon, which looks like a thumbtack. Click the icon to turn off the auto hide feature.
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CHAPTER 5 INTRODUCING VISUAL BASIC AND THE .NET FRAMEWORK
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Figure 5-8. VS Toolbox
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2. Under the All Windows Forms node of the Toolbox are controls that you can drag-and-drop onto your form to build the GUI. There are also other nodes that contain nongraphical components that help make some common programming tasks easier to create and manage. For example, the Data node contains controls for accessing and managing data stores. Scroll down the Toolbox window and observe the various controls exposed by the designer. 3. Under the All Windows Forms node, select the Label control. Move the cursor over the form; it should change to a crosshairs pointer. Draw a label on the form by clicking, dragging, and then releasing the mouse. In a similar fashion, draw a TextBox control and a Button control on the form. Figure 5-9 shows how the form should look.
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Figure 5-9. Sample form layout 4. Turn the auto hide feature of the Toolbox back on by clicking the Auto Hide (thumbtack) icon in the upper-right corner of the Toolbox window. 5. Locate the Properties tab to the right of the main editing window, or select View Properties Window to open the Properties window. The Properties window displays the properties of the currently selected object in the Design View. You can also edit many of the object s properties through this window. 6. In the Form1 design window, click Label1. The Label1 control should be selected in the drop-down list at the top of the Properties window (see Figure 5-10). Locate the Text property, and change it to Enter your password:.
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Figure 5-10. VS Properties window
Note You may need to resize the label on the form to see all the text.
7. Set the PasswordChar property of TextBox1 to *. Change the Text property of Button1 to OK. (Click the control on the form or use the drop-down list at the top of the Properties window to see the control s properties.)
CHAPTER 5 INTRODUCING VISUAL BASIC AND THE .NET FRAMEWORK
Building and Executing the Assembly
To build and execute the assembly, follow these steps: 1. In the Solution Explorer, click Form1. At the top of the Solution Explorer, click the View Code toolbar button. The code editor for Form1 will be displayed in the main editing window. 2. In the left drop-down list at the top of the code editor, select the Button1 control. In the right drop-down list, select the click event. A method that handles the button click event is added to the code editor. 3. Add the following code to the method. This code will display the password entered in TextBox1 on the title bar of the form: Me.Text = "Your password is " & txtBox 4. Press Enter to move the cursor to the next line of code. You should see a blue squiggly line appear under the word txtBox. The auto syntax check feature indicates that txtBox is not a recognized word. Change txtBox to TextBox1.Text: Me.Text = "Your password is " & TextBox1.Text 5. Move the cursor to the next line of code. The blue squiggly line should disappear. 6. Select Build Build Solution. The Output window shows the progress of compiling the assembly (see Figure 5-11). Once the assembly has been compiled, it is ready for execution. (If you cannot locate the Output window, select View menu Other Windows Output.)
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