🚀 go-pugleaf

Hi, i'm making a class where i need to wait inside a function for an event.
The problem is, this event is a Event RX from the Comm Port.  I need to read
several Messages from the port before let the funtion to continue, so i need
do something like:
//---------------------------------------------
msg GetMessage(){
    while(Not Have all the Message OR TimeOut is Reached){
        Wait.....
    }

    return CompleteMessage //Global Variable;
}
//---------------------------------------------
Event Function (Read From the Port Event){
    CompleteMessage += ReadFromtheCommPort();
}
/---------------------------------------------------------------------------
-----------------

My problem of course is a While with a ";", so i neever reach the Event
handler function and my App hang on.  I need only an IDEA because I don't
have more.

I preciate any, ANY idea.  i made it with WM_USER messages, but i need a way
to make from other application only "MyLocal = GETSOMETHING()"; where that
getsomething is a function how wait information from the port for a specific
time is gone or a message received Without hang on my app.

Thanks, and sorry if my knowlege is not much (in case all this is wrong
;-) ).