Powershell

Using Shared Variables

By default, all variables created in functions are local, so they only exist within that function and all functions that are called from within this...

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Catching Errors

In forums, people often get confused with error handling. For example, this code does not call the error handler. Instead, the red PowerShell error...

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Analyzing System Restarts

To find out when a system restarted and why, use the below code to extract the relevant information from the System event log: Get-EventLog -LogName...

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Use WMI and WQL!

WMI is a great information resource, and Get-WmiObject makes it easy to retrieve WMI instances. First, use -List parameter to find WMI class names....

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Convert to Numeric

Whenever PowerShell asks for user input or reads text file content, the results are text strings. If you expect numbers and want to calculate, make...

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Create Own Driver Tool

Thanks to Peter Bishop, here's an enhancement to one of our earlier tips. It turns the command line output delivered by driverquery.exe into a...

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Ignoring Empty Lines

To read in a text file and skip blank lines, try this: $file = 'c:\sometextfile.txt' Get-Content $file | Where-Object { $_.Trim() -ne...

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Creating System Footprints

WMI can retrieve a lot more object instances than you might think. If you submit a parent class, Get-WmiObject returns all instances of all derived...

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Retrieve Exchange Rates

If you need up-to-date exchange rates, try loading the rates via XML from the European Central Bank. This sample gets you the latest exchange rates...

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Reading the Clipboard

What if you wanted to paste information from the clipboard? No sweat, here is a Get-Clipboard function that outputs any text held by the clipboard:...

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