🚀 go-pugleaf

> how does one use the Yield call?

One doesn't.  If your application has windows, then Yield is a no-op.

If you want to yield control, you must empty the message queue.  That
means either calling GetMessage to empty the queue (and block till a
message arrives), or using PeekMessage.  Thus, you can do something
like:

    while (more processing required) {
	do processing;

	while (PeekMessage(&msg, hWnd, 0, 0, TRUE)) {
	    TranslateMessage(&msg);
	    DispatchMessage(&msg);
	}
    }

You do *NOT* want to throw away the messages comming in during this
loop, so you have to be careful of reentrancy problems.  As far as I know,
this is the only way to yield during message processing.

--Bill Turner