generate barcode using vb.net . Reg .exe Operations in C#

Generating UPC-A in C# . Reg .exe Operations

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where operation is one of the 12 items listed in Table 26-2, and parameter list is one or more items (the name of a subkey or value, for example) pertinent to the specified operation. You can get additional syntax details about an operation by typing reg operation / . For example, to learn more about how to use the Query operation, type reg query / .

Effect Adds a key, value, or data item Compares one value with another or all values under a particular key with all values under another key Copies a value or key from one location in the registry to another Deletes a key or value Exports a key as a Unicode .reg file Displays or sets registry virtualization flags for subkeys of HKLM\Software Imports a .reg file (to the local registry only) Loads a hive file to a specified new key Returns the data associated with a specified value or with all values of a specified key Loads a hive file into an existing key, overwriting that key Creates a hive file Unloads a hive file

Some guidelines to note about Reg.exe s syntax:

Reg.exe requires that you abbreviate the names of root keys. Use HKLM, for example, not HKEY_LOCAL_MACHINE. If a key or value name includes spaces, enclose the name within quotation marks. If you re incorporating a Reg.exe command in a batch program and that command includes an environment variable, enclose the variable name within two pairs of percent signs, not a single pair of percent signs. Otherwise, the command interpreter expands the variable name before passing it to Reg.exe.

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All Reg.exe operations issue Errorlevel values that can be tested in batch programs. For all operations except Compare, these values are 0 if the operation is successful and 1 if unsuccessful. Compare returns 0 if the operation is successful and all compared values are identical, 1 if the operation is unsuccessful, or 2 if the operation is successful and there are differences in the compared values. For more information about batch programs, see Automating Command Sequences with Batch Programs, 30.

Advanced Internet Explorer Security and Administration . . . . . . . . . . . . . . . . . . . . . 879

Controlling Access to Files and Folders . . . . . . . . . . . . . . . . . . . . . . . . . . . 943

Working with (and Around) Protected Mode . . . . . . . 880 Using and Customizing Internet Security Zones . . . . . 882 Protecting Yourself from Unsafe and Unwanted Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 886 Installing, Remoing, and Troubleshooting Add-Ons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 896

Managing Cookies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 898 Managing Internet Explorer s Cache and History . . . . 906 Blocking Objectionable Content . . . . . . . . . . . . . . . . . . 908 Saing and Applying Internet Explorer Settings . . . . . 911

arlier in this book, we discussed the features and capabilities of Internet Explorer 7 and explained how to use and customize those you re likely to work with day in and day out. In this chapter we look in detail at features that improve your security online. The bedrock of Internet Explorer security in Windows Vista is its consistent use of Windows permissions to limit what webpages and add-ons can do. This security fence around the browser window is called Protected Mode. In this chapter, we explain how Protected Mode defangs potentially dangerous add-ons by restricting their access to system files and redirecting files they save or create to locked-down virtualized locations. We think the minor inconveniences of Protected Mode are far outweighed by its positive effect on your system s security; for that reason, we recommend leaving Protected Mode enabled. A very small minority of Windows Vista users may find that Protected Mode causes a problem that has no easy workaround (such as the inability to run a custom add-on); for that tiny group only, we explain how to disable Protected Mode. Just as in previous versions, Internet Explorer 7 uses security zones to save and apply groups of settings. Knowing the differences between behaviors that are allowed and prohibited in each security zone is a crucial aspect of protecting yourself and other users of your computer and network. In this chapter, we look in depth at each of the default security zones and explain how to change the permissions to create custom security zones.