Mega Code Archive
Calling a Function with a Structure Parameter
<![CDATA[
/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson
Publisher: Apress L.P.
ISBN: 1-893115-62-3
*/
// 31 - Interop\Calling Native DLL Functions\Calling a Function with a Structure Parameter
// copyright 2000 Eric Gunnerson
using System;
using System.Runtime.InteropServices;
struct Point
{
public int x;
public int y;
public override string ToString()
{
return(String.Format("({0}, {1})", x, y));
}
}
struct Rect
{
public int left;
public int top;
public int right;
public int bottom;
public override string ToString()
{
return(String.Format("({0}, {1})\n ({2}, {3})", left, top, right, bottom));
}
}
struct WindowPlacement
{
public uint length;
public uint flags;
public uint showCmd;
public Point minPosition;
public Point maxPosition;
public Rect normalPosition;
public override string ToString()
{
return(String.Format("min, max, normal:\n{0}\n{1}\n{2}",
minPosition, maxPosition, normalPosition));
}
}
public class CallingaFunctionwithaStructureParameterWindow
{
[DllImport("user32")]
static extern int GetForegroundWindow();
[DllImport("user32")]
static extern bool GetWindowPlacement(int handle, ref WindowPlacement wp);
public static void Main()
{
int window = GetForegroundWindow();
WindowPlacement wp = new WindowPlacement();
wp.length = (uint) Marshal.SizeOf(wp);
bool result = GetWindowPlacement(window, ref wp);
if (result)
{
Console.WriteLine(wp);
}
}
}
]]>