改变窗口大小,该怎么处理

改变窗口大小
在窗口没有窗体边框和标题栏的情况下   怎样改变窗口大小   能有拖动的功能吗？   如果里面有个picturebox   ，怎样可以让   picturebox   里面的图片也随之改变大小？

[解决办法]
设置 picturebox.anchor=Top,Bottom,left,right
[解决办法]
设置picturebox的Dock属性为fill.
[解决办法]
1、拖动：添加API函数 SendMessage和ReleaseCapture,可以拖动
Declare Function SendMessage Lib "user32 " Alias "SendMessageA " ( _
ByVal hwnd As IntPtr, _
ByVal wMsg As Integer, _
ByVal wParam As Integer, _
ByVal lParam As Integer) _
As Boolean
Declare Function ReleaseCapture Lib "user32 " Alias "ReleaseCapture " () As Boolean
Const WM_SYSCOMMAND = &H112
Const SC_MOVE = &HF010&
Const HTCAPTION = 2

Private Sub Form1_MouseDown(ByVal sender As Object, _
ByVal e As System.Windows.Forms.MouseEventArgs) _
Handles MyBase.MouseDown
ReleaseCapture()
SendMessage(Me.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0)
End Sub

2、改变窗口大小让 picturebox 里面的图片也随之改变大小用楼上的方法应该可以。