how to cast system.intptr to struct

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Hi all,
how to cast an System.IntPtr value to struct type.
Example:
protected override void WndProc(ref System.Windows.Forms.Message m)


{

const int WM_WINDOWPOSCHANGED = 0x0047;

if(m.Msg == WM_WINDOWPOSCHANGED)


{

string str="";

quickGetText(0,-1,ref str);

//HERE I NEED TO CAST m.LParam to WINDOWPOS struct

//WINDOWPOS wndptr = (WINDOWPOS)m.LParam;

return;


}

base.WndProc(ref m);

}

//C++ structure declaration

[StructLayout(LayoutKind.Sequential)]

struct WINDOWPOS

{

System.IntPtr hwnd;

System.IntPtr hwndInsertAfter;

int x;

int y;

int cx;

int cy;

System.UInt32 flags;

}

Can any help me out.

regards

subash

 

[BestNews]

Thanks a lot Mattias Sjögren

WINDOWPOS wndptr = (WINDOWPOS)m.GetLParam(typeof(WINDOWPOS));



Mattias