How can i Send Message between 2 Application?

Hi everyone,
This is the first time i'm using this forum so i'm not sure how this is done, anyway my qustion is as the topic says.

I'm trying to send a simple message like "hello" from let's say Application1 to Application2 in "Borland C++ Builder 6"

1) how do i send a message
2) how do i receive the message

I been reading and searching and so far the only thing i been able to do is to find the handle for a application by using:

HANDLE hwnd = FindWindow(0,"Application1");

I think the function "SendAppMessage" could be used for sending a message but there is not much help or example for this :(

I realy appreciate it if anyone could help me with this problem.

Thanks
/reza666