Shoutbox

quote:

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Originally posted by Jana.
How can I get the xy Positions out of the lParam i get back from the Message?

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For stuff like that it is always a good idea to look things up in the MSDN Library:

=> WM_MOUSEMOVE

quote:

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x is the low word of the double word lParam variable
y is the high word of the double word lParam variable

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thus:

    var x = lParam & 0xFFFF
    var y = lParam >>> 16

don't confuse >>> (unsigned right shift operator) with >> (signed right shift operator). See Windows scripting docs for detailed info.




PS: also read "The Old New Thing: Why do I get spurious WM_MOUSEMOVE messages?" if you want to use WM_MOUSEMOVE.


PS: Checking mouse movement over a control with the WM_MOUSEMOVE Windows Message is possible, but does not provide ways to detect if the mouse moved out of the control. For that you need to setup a mouse tracking/capturing message with the Windows API SetCapture.