answer that question. You should learn to read, it was the response to the very first quote in the previous message. I wonder how many times you expect us to answer the same question over and over?
Under what circumstance is it appropriate for maximized MDI client windows to be moving around within their base?
: Under the circumstance where the user wants it to happen. Clearly Microsoft thinks it should be possible, since your bug is caused by WINDOWS (not mIRC) handling the WM_SCROLL events. Unless you're going with "Windows behaviour is wrong", this is all the justification that is needed. If you're actually saying Windows is wrong, you should take it up with them.
If you don't like the answer
, fine. But stop asking it over and over like a damn broken record, the answer isn't going to change.