File security mechanism of windows xp

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For this method to work properly, the executables that run remotely must reside on the target remote computer in the directory path specified by the Exec command line. Also, keep in mind that if you use this method, you cannot expect to return data from these executables since the WshRemote object only returns status and error information.

WSH does not recognize whether one of the command-line parameters used in a remote WSH invocation is itself a local file, since arguments are treated like strings. Running a script via Remote WSH is like running that script on the remote machine.

If you need files copied over to a remote machine for further use, then you'll have to write code to copy them yourself. The status of a WSH remote script can be represented by any of the values listed in Figure Compared to connecting to the events of the WshRemote object, the Status property gives you an inexpensive way to get status information. Connecting to events uses more computer resources and can sometimes be tricky.

This code shows how to run a remote script and monitor its progress:. Notice that the Status property of the WshRemote object is only updated when it is effectively queried, minimizing the traffic between calling and called scripts. An alternative that uses events is shown in Figure If a remotely instantiated script terminates because of an error, the WshRemoteError object is filled with error properties such as Number, Description, Character, SourceText, and Source.

You access this object through the WshRemote Error property, typically from within an event handler that catches the Error event.

It runs an application in a child command shell and provides access to streams of the spawned process like StdIn, StdOut, and StdErr. The Exec method takes a string value indicating the command line used to run the script. The command line should appear exactly as you would have typed it at the command prompt. The Exec method returns a WshScriptExec object, which is the object that actually provides status and error information about the script being run.

You cannot use the Exec method to execute anything other than command-line console applications. Likewise, the Exec method cannot be used to run remote scripts and should not be confused with the Execute method of the WshRemote object. The WshScriptExec object solved an issue for script developers who needed to spawn console or command prompt applications.

A simple, yet effective approach is the following:. There is nothing wrong with this approach as long as it really provides what you need. The Run method ceases to be the ideal approach if you need to access the input, output, and error streams of the spawned application. In this case, you are better off using the Exec method.

The WshArguments object provides access to the entire collection of command-line parameters in the order they have been specified. WshArgument is a collection that can be accessed according to the typical programming interface of COM collections.

Named arguments are command-line arguments that have been associated with a name. All arguments not associated with a name fall in the category of unnamed arguments. The contents of the Arguments collection are always the sum of the contents of Named and Unnamed arguments.

In general, a command-line argument includes two distinct types of information: the role and the value. For most applications, the role of each parameter is implied by the position it occupies on the command line. The program assumes that the first parameter means one thing, the second another, and the third something else. The role of a named argument is not implied by position but comes as a part of the argument itself.

Consider this command:. Scripts that define their command-line arguments according to this schema have a way to identify their input values by name. Named arguments are far easier to manipulate because they can be placed anywhere on the command line and are self-explanatory. Any other combination of characters simply won't work. The value of the parameter is what comes after the colon until a blank character is found. If you want to assign it a string that may contain blanks, you must wrap it in quotes, like this:.

When a named argument is stored in the Named collection, the wrapping quotes, if any, are removed. All the named arguments are extracted from the command line, parsed, and made accessible through the Named collection. The following code returns the number of named arguments for the current script:. The Named collection provides the typical programming interface for collections. This includes properties like Item, Count, and Length.

In addition, Named has an extra method, Exists. The Exists method checks whether the collection contains an item whose name matches the specified text:. All the arguments on the command line that don't have a name are considered unnamed and grouped in the Unnamed collection.

You retrieve any unnamed argument as you would retrieve a generic item from Arguments. Script applications implemented through the WSH schema can include metadata, which is information used to request special services from the WSH runtime. In particular, all the information defined within the runtime element serves as self-documentation. It lets you specify the expected arguments, a description of the script's behavior, and usage information.

The runtime element is the parent element within which you define all run-time arguments and usage information. The runtime element is normally placed immediately following the job element. It is a child of a given job, and all of its settings apply only to that particular job:.

The named element indicates one of the named arguments that a job supports. It recognizes four attributes: Name, Helpstring, Required, and Type. The Name attribute, as you might guess, allows you to define an argument name. The Helpstring attribute specifies the description of the argument. The Required attribute is used to set an argument as required or optional. Type is an optional attribute that describes the type of the argument. It determines how the argument will be parsed from the command line.

Allowed values are "simple," "string," and "boolean," with "simple" being the default value. Figure 13 shows the elements you can use under the runtime element that influence the output of ShowUsage. The code in Figure 14 generates the message box shown in Figure Figure 15 WSH Options The run-time information for each parameter is used only for self-documentation and to format the data displayed by the ShowUsage method of the WshArguments collection.

The runtime elements do not enforce the values set for the arguments it contains. For example, if an argument is marked as required but is actually missing from the command line, no error will be raised. The list of enhancements in WSH 5. But before closing, let me mention a couple of tips that will help you when scripting for Windows XP.

First is a visual issue. Windows XP has Visual Styles that can be turned on programmatically. All that's needed is an XML manifest file with the same name as the executable, with a. Amazingly, the same XML manifest file can work unchanged with any executable on that machine, but you might want to customize the product and copyright information. However, turning themes on for all WSH applications is easy. In doing so, you'll notice that the System32 folder already contains a few other manifest files.

The effect, with and without the manifest, is shown in Figure Password, implemented in the scriptpw. Although this is not officially part of the WSH 5. The ScriptPW object works as a password reader and allows you to type in sensitive data without displaying it. The GetPassword method collects and returns the typed text. You use the component as follows:. Password is certainly useful because it addresses functionality that was previously missing.

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