public static void SendMessage(IntPtr hwnd, String message)
{
var messageBytes = Encoding.Unicode.GetBytes(message); /* ANSII encoding */
var data = new UnsafeNative.COPYDATASTRUCT {
dwData = IntPtr.Zero,
lpData = message,
cbData = messageBytes.Length + 1 /* +1 because of \0 string termination */
};
if (UnsafeNative.SendMessage(hwnd, WM_COPYDATA, IntPtr.Zero, ref data) != 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
public static void Main(String[] args)
{
var proc = Process.GetCurrentProcess();
var processName = proc.ProcessName.Replace(".vshost", "");
// NOTE: poor performance !
var runningProcess = Process.GetProcesses()
.FirstOrDefault(x => (x.ProcessName == processName || x.ProcessName == proc.ProcessName || x.ProcessName == proc.ProcessName + ".vshost") && x.Id != proc.Id);
if (runningProcess == null)
{
var app = new App();
app.InitializeComponent();
var window = new MainWindow();
MainWindow.HandleParameter(args);
app.Run(window);
return; // In this case we just proceed on loading the program
}
if (args.Length > 0)
{
UnsafeNative.SendMessage(runningProcess.MainWindowHandle, String.Join(" ", args));
}
}