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Pass command-line arguments to already running application

Posted on 2010-08-24
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Last Modified: 2012-05-10
I know how to parse through the command line arguments passed to the application when it was originally opened. Is it possible to pass more arguments to the application after it has already been opened? The app I am running is a single instance application and I was hoping to be able to pass them in the MyApplication_StartupNextInstance subroutine but can't seem to grab the new command-line parameters. Thanks.
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Question by:rbichon
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Mike Tomlinson earned 2000 total points
ID: 33515740
Sure....you're using "e.CommandLine" in the StartupNextInstance() event right?
Namespace My

    ' The following events are available for MyApplication:
    ' 
    ' Startup: Raised when the application starts, before the startup form is created.
    ' Shutdown: Raised after all application forms are closed.  This event is not raised if the application terminates abnormally.
    ' UnhandledException: Raised if the application encounters an unhandled exception.
    ' StartupNextInstance: Raised when launching a single-instance application and the application is already active. 
    ' NetworkAvailabilityChanged: Raised when the network connection is connected or disconnected.
    Partial Friend Class MyApplication

        Private Sub MyApplication_StartupNextInstance(ByVal sender As Object, ByVal e As Microsoft.VisualBasic.ApplicationServices.StartupNextInstanceEventArgs) Handles Me.StartupNextInstance
            Dim args As New List(Of String)
            args.AddRange(e.CommandLine.ToArray())

            ' ... use "args" somehow ...

        End Sub

    End Class


End Namespace

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by:rbichon
ID: 33515761
Nope. That was it! Thanks!!
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Expert Comment

by:Mike Tomlinson
ID: 33515769
*Just FYI, "Environment.CommandLine" ALWAYS gets the args from when the process was STARTED:
http://msdn.microsoft.com/en-us/library/system.environment.commandline.aspx

    "This property provides access to the program name and any arguments specified on the command line when the current process was started."
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