Waitforexit vb.net

WaitForExit ' display results MessageBox. Show "Notepad was closed at: Close End Sub The preceding example illustrates an interesting point. Even though the launched process has closed, you still have the ability to access the Process object in code; however, at that point, most of the Process properties are unavailable, because the process itself no longer exists. You can still read the ExitCode and ExitTime properties, which return Integer and DateTime values.

DOS commands set an exit code that lets you know whether errors occurred. NET and other Windows applications can set the value by using the return value of the main method. By default, the value is zero.

For DOS vb.net, a non-zero ExitCode waitforexit indicates either an error or that the command process was closed abnormally. When you use the Process. Start method from a process instance, you should also call Process. Close after vb.net process exits, to free the memory associated with the Process object. Now Javascript is disabled. You have characters left. Sponsored Research Editorial Research. The Dawning of a New Standard Going Mobile: Getting Your Apps On the Road Software as a Service: Building On-Demand Applications in the Cloud A New Era for Rich Internet Applications The Road to Ruby Vista's Bounty: Surprising Features Take You Beyond.

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Specialized Dev Zones Research Center eBook Library. Handle WPF Application Exceptions all vb.net one Place. Display of Bit Field on UI. Capture Errors from a BackGroundWorker Component in the RunWorkerCompleted Event. Monitoring Launched Processes So far, the launched processes you've seen behave in an asynchronous manner; just like the classic VB Shell function. In other words, after launching the process, code in the parent program continues to execute.

Depending on waitforexit application, you may need to approach the problem in any of several different ways. You want vb.net launch the process, halting your program until it exits. You want to launch the process, monitor it, and do something only when it ends, letting your program run normally in the meantime.

You want to launch the process, give it some input, let it process the input, and then force it to exit. You want to launch the process and do something only as long as the launched process is running or is running without problems. If the process exits or stalls, you want to take some action. For example, you might want to launch a command window, programmatically type something into the window, and then retrieve and process the output.

Launch a Process and Vb.net Until It Exits The simplest way to wait for a launched process to end is to call the Process. That causes waitforexit launching process to stop executing until the launched process exits. Vb.net, when you use this directly from a Windows Form, it also causes the waitforexit to stop responding to system events, such as Paint. So you wouldn't normally want vb.net use the WaitForExit method to vb.net an external program from a Button although it's perfectly appropriate to use the WaitForExit method to launch a second process from an application that has no visible user interface, such as calling a console application from the server in an ASP.

The sample form has a button called "Launch and WaitForExit" see Figure 2 that lets you see what happens when you use this method from a form. The waitforexit form lets you test and experiment with various ways of launching a process.

Previous Page Next Page. Thanks for your registration, follow us on our social networks to keep up-to-date. Enterprise Issues For Developers Specialized Dev Zones. Sign up for e-mail newsletters from DevX. Handle WPF Waitforexit Exceptions all in one Place Handle WPF Application Exceptions all in one Place Display of Bit Field on UI Tip: Capture Errors from a BackGroundWorker Component in the RunWorkerCompleted Event Capture Errors from a BackGroundWorker Component in the RunWorkerCompleted Event.

Author Feedback Email Article Print Article Comment on this Article Waitforexit del. Waitforexit and Monitoring External Programs from VB. Page 2 You no longer need to use the Win32 API waitforexit the VB Shell function to launch external applications.

Instead, use the System. Process class built into vb.net. NET framework to simplify your code.