protected IntPtr WindowMessageHook(
int msg,
IntPtr wParam,
IntPtr lParam,
ref bool handled
)
{
handled = false;
if (msg != NativeMethods.WM_COPYDATA)
{
return(IntPtr.Zero);
}
MessageEnvelope envelope = EnvelopeCopyDataStruct.TryUnmarshalEnvelope(lParam);
if (envelope != null && envelope.SharedIdentifier == SharedIdentifier)
{
InvokeMessageHandlers(envelope.Message);
handled = true;
return(CopyDataResultSuccess);
}
return(IntPtr.Zero);
}
private bool SendMessage(IntPtr targetWindowHandle, object message)
{
var envelope = new MessageEnvelope(SharedIdentifier, message);
using (EnvelopeCopyDataStruct cds = new EnvelopeCopyDataStruct(envelope)) {
IntPtr result;
NativeMethods.SendMessageTimeout(
hWnd: targetWindowHandle,
Msg: NativeMethods.WM_COPYDATA,
wParam: IntPtr.Zero,
lParam: cds.Pointer,
fuFlags: SendMessageTimeoutFlags.SMTO_BLOCK | SendMessageTimeoutFlags.SMTO_ABORTIFHUNG,
uTimeout: 10000,
lpdwResult: out result
);
return(result == CopyDataResultSuccess);
}
}
