窗体最大化的时候，如何指定窗体的位置、大小(C#)

【IT168技术文档】

  1）使用窗体默认的最大化方法
  this.WindowState = FormWindowState.Maximized 发现窗体的位置x和y都是小于零的。设置了 this.Location = new Point(1, 1);后仍然无效。。。 



  2)设置了窗体的最大值后，测试发现有时候（窗体宽度接近屏幕的宽度的时候），窗体的高度的设置是无效的。
  this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace WindowsApplication1
{
public partial class FormRegion : Form
{
private const long WM_GETMINMAXINFO = 0x24;
public struct POINTAPI
{
public int x;
public int y;
}
public struct MINMAXINFO
{
public POINTAPI ptReserved;
public POINTAPI ptMaxSize;
public POINTAPI ptMaxPosition;
public POINTAPI ptMinTrackSize;
public POINTAPI ptMaxTrackSize;
}
public FormRegion()
{
InitializeComponent();
this.MaximumSize = new Size(Screen.PrimaryScreen.WorkingArea.Width, Screen.PrimaryScreen.WorkingArea.Height);
}
protected override void WndProc(ref System.Windows.Forms.Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_GETMINMAXINFO)
{
MINMAXINFO mmi = (MINMAXINFO)m.GetLParam(typeof(MINMAXINFO));
mmi.ptMinTrackSize.x = this.MinimumSize.Width;
mmi.ptMinTrackSize.y = this.MinimumSize.Height;
if (this.MaximumSize.Width != 0 || this.MaximumSize.Height != 0)
{
mmi.ptMaxTrackSize.x = this.MaximumSize.Width;
mmi.ptMaxTrackSize.y = this.MaximumSize.Height;
}
mmi.ptMaxPosition.x = 1;
mmi.ptMaxPosition.y = 1;
System.Runtime.InteropServices.Marshal.StructureToPtr(mmi, m.LParam, true);
}
}
}
}