I'm currently designing an image viewer that allows the user to input her e-mail and get the images digitally. The part that troubles me is getting the on-screen keyboard to close. I use this piece of code to start the windows process:
string progFiles = @"C:\Program Files\Common Files\Microsoft Shared\ink"; string keyboardPath = Path.Combine(progFiles, "TabTip.exe"); Process keyboardProc = Process.Start(keyboardPath);
After which i open a VB InputBox to prompt for the e-mail address (for which i use the on-screen keyboard, since the application will be shown on a touch screen). After this prompt I want to close the process automatically.
I've tried to close the process with the following:
keyboardProc.Kill(); keyboardProc.Dispose(); keyboardProc.Close(); keyboardProc = null;
None of them works and simply throws the exception:
An unhandled exception of type 'System.InvalidOperationException' occurred in System.dll Additional information: Cannot process request because the process has exited.
I also tried identifying the process by ID and closing it this way, didn't work either.
I also had a look at:
C#/.NET: Closing another process outside the main window
but didn't get it working either.. 🙁
I'm pretty new to C# and this is the first time I've invoked a windows process from code – am I missing something?
Thank you very much in advance!