Shoutbox

This is easy actually, I asked the same question a while back:

code:

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var pNmhdr = Interop.Allocate(12); // if this is the wrong size sorry
Interop.Call('Kernel32.dll', 'RtlMoveMemory', pNmhdr.DataPtr, lParam, pNmhdr.Size);
// do stuff with pNmhdr

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If you want to modify the structure, just call RtlMoveMemory again with the opposite parameters after you're all done modifying it:

code:

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Interop.Call('Kernel32.dll', 'RtlMoveMemory', lParam, pNmhdr.DataPtr, pNmhdr.Size);

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PS: How are you subclassing the control? Dll? or are you just processing the notifications it sends to the parent window?