C# 处理无边框窗体

1、右击任务栏图标显示右键菜单

   

     
 [DllImport(
    "
    user32.dll
    "
    , EntryPoint 
    =
     
    "
    GetWindowLong
    "
    , CharSet 
    =
     CharSet.Auto)]
 
    public
     
    static
     
    extern
     
    int
     GetWindowLong(HandleRef hWnd, 
    int
     nIndex);

 [DllImport(
    "
    user32.dll
    "
    , EntryPoint 
    =
     
    "
    SetWindowLong
    "
    , CharSet 
    =
     CharSet.Auto)]
 
    public
     
    static
     
    extern
     IntPtr SetWindowLong(HandleRef hWnd, 
    int
     nIndex, 
    int
     dwNewLong);


 
    private
     
    void
     ShowContextMenuStrip()
 {
 
    int
     WS_SYSMENU 
    =
     
    0x00080000
    ; 
    //
     系统菜单
    

     
    int
     WS_MINIMIZEBOX 
    =
     
    0x20000
    ; 
    //
     最大最小化按钮
    

    
 
    int
     windowLong 
    =
     (GetWindowLong(
    new
     HandleRef(
    this
    , 
    this
    .Handle), 
    -
    16
    ));
 SetWindowLong(
    new
     HandleRef(
    this
    , 
    this
    .Handle), 
    -
    16
    , windowLong 
    |
     WS_SYSMENU 
    |
     WS_MINIMIZEBOX);
 }
   

2、设定最大Bounds 为 主显示器的WorkingArea区域 防止最大化掩盖任务栏

   

               this.MaximizedBounds = Screen.PrimaryScreen.WorkingArea;