protected override void WndProc(ref Message m)
{
switch (m.Msg)
{
case Win32.WM_COPYDATA:
Win32.CopyDataStruct st = (Win32.CopyDataStruct)Marshal.PtrToStructure(m.LParam, typeof(Win32.CopyDataStruct));
string strData = Marshal.PtrToStringUni(st.lpData);
OpenFile(strData);
Activate();
break;
default:
// let the base class deal with it
base.WndProc(ref m);
break;
}
}
static void Main()
{
if (mutex.WaitOne(TimeSpan.Zero, true))
{
#region standaard
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
#endregion
MainForm frm = new MainForm();
MainWindowHandle = (int)frm.Handle;
Application.Run(frm);
MainWindowHandle = 0;
mutex.ReleaseMutex();
}
else
{
int hwnd = 0;
while (hwnd == 0)
{
Thread.Sleep(5);
hwnd = MainWindowHandle;
}
Win32.CopyDataStruct cds = new Win32.CopyDataStruct();
try
{
string data = GetFileName();
cds.cbData = (data.Length + 1) * 2; // number of bytes
cds.lpData = Win32.LocalAlloc(0x40, cds.cbData); // known local-pointer in RAM
Marshal.Copy(data.ToCharArray(), 0, cds.lpData, data.Length); // Copy data to preserved local-pointer
cds.dwData = (IntPtr)1;
Win32.SendMessage((IntPtr)hwnd, Win32.WM_COPYDATA, IntPtr.Zero, ref cds);
}
finally
{
cds.Dispose();
}
}
}