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Asked: 2026-05-11T00:21:04+00:00

Hi I have an MDI application where a child window handles a number of

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Hi I have an MDI application where a child window handles a number of mouse events. Everything has worked no problem (e.Button, e.Location, etc) until I tried to get the value from e.Delta (number of mouse detents).

e.Delta always returns 0.

My events are trigger no problem, just the value of e.Delta is always zero while everything else seems valid.

I’ve tried the following events within my child form:
MouseClick
MouseDown
MouseMove
MouseUp

I even tried handling an some mouse events in the main parent MDI window to see if it would help, but same result… e.Delta always = 0.

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1 Answer

  1. Well, that property probably isn’t going to be valid unless it comes to you through a MouseWheel event (which I don’t see on the list up there).

    Try attaching to that, and you should get the event when the wheel is turned.

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