Excel's Formula - sisman

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Part VI: Developing Custom Worksheet Functions
If your goal is to become a VBA expert, this book nudges you in that direction, but it
does not get you to your final destination. You may want to check out another book of
mine: Excel 2010 Power Programming with VBA (Wiley). That book covers all aspects of
VBA programming for Excel.
Displaying the Developer Tab
If you plan to work with VBA macros, you’ll want to make sure that the Developer tab is displayed
in Excel. To display this tab
1. Right-click anywhere in the Ribbon, and select Customize the Ribbon to display the
Customize Ribbon tab of the Excel Options dialog box.
2. In the list box on the right, place a check mark next to Developer.
3. Click OK to return to Excel.
After completing these steps, the Developer tab will always be displayed. Figure 22-1 shows how
the Ribbon looks when the Developer tab is selected.
Figure 22-1: The Developer tab, which does not display by default, contains commands that are useful
for VBA users.
About Macro Security
Macros have the potential to cause serious damage to your computer. Consequently, Microsoft
has added macro security features to help prevent macro-related problems.
Figure 22-2 shows the Macro Settings section of the Trust Center dialog box. To display this dialog
box, choose Developer➜Code➜Macro Security.
By default, Excel uses the Disable All Macros with Notification option. With this setting in effect, if
you open a workbook that contains VBA macros (and the file is not digitally “signed” or is from an
untrusted location), Excel displays a Security Warning above the Formula bar (see Figure 22-3).
If you are certain that the workbook comes from a trusted source and that the macros are safe,
click the Enable Content button to enable the macros in the workbook.