When launching an application, you might want to pass in some environment variables to your program.
The Environment Variables dialog lets you manage name/value pairs, including importing and exporting for use between programs or sessions.
The dialog initially has no entries.
The example below shows the equivalent of set QT_PLUGIN_PATH=%QTDIR%\plugins

•Add... 
 adds a new item to the list 
 enter name in the first column, value in the second 
•Delete 
 deletes a selected item in the list 
•Delete All 
 clears the list 
•Acquire 
 fetches all system environment variables, adding them to the list 
•Import... 
 loads variables from a previously exported file, adding them to the list 
•Export... 
 saves all entries in the list to a file of your choice
The exported file is a simple ascii file with one entry per line of the form name=value
•OK 
 accepts all changes
•Cancel 
 ignores changes