C# Signature:

[DllImport("user32.dll")]
static extern bool MoveWindow(IntPtr hWnd, int X, int Y, int nWidth,
   int nHeight, bool bRepaint);

C++ Signature:

[DllImport("User32.dll")]
static bool MoveWindow(IntPtr handle, int x, int y, int width, int height, bool redraw);

VB.NET

<DllImport("user32.dll")>_
Shared Function MoveWindow(ByVal hWnd As IntPtr, ByVal x As Integer, ByVal y As Integer, ByVal nWidth As Integer, _
                           ByVal nHeight As Integer, ByVal bRepaint As Boolean) As Boolean

End Function

User-Defined Types:

None.

Notes:

None.

Tips & Tricks:

Please add some!

Sample Code:

C# Code:

    class Program
    {
    internal struct RECT
    {
        public int left;
        public int top;
        public int right;
        public int bottom;
    }

    [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]
    internal static extern IntPtr GetForegroundWindow();

    [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, ExactSpelling = true, SetLastError = true)]
    internal static extern bool GetWindowRect(IntPtr hWnd, ref RECT rect);

    [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, ExactSpelling = true, SetLastError = true)]
    internal static extern void MoveWindow(IntPtr hwnd, int X, int Y, int nWidth, int nHeight, bool bRepaint);

    static void Main(string[] args)
    {
        IntPtr id;
        RECT Rect = new RECT();
        Thread.Sleep(2000);
        id = GetForegroundWindow();
        Random myRandom = new Random();
        GetWindowRect(id, ref Rect);
        MoveWindow(id, myRandom.Next(1024), myRandom.Next(768), Rect.right - Rect.left, Rect.bottom - Rect.top, true);

    }
    }

VB code:

    Public Declare Auto Function MoveWindow Lib "user32.dll" ( _
    ByVal hWnd As IntPtr, _
    ByVal X As Int32, _
    ByVal Y As Int32, _
    ByVal nWidth As Int32, _
    ByVal nHeight As Int32, _
    ByVal bRepaint As Boolean _
    ) As Boolean

    Private Sub ResizeMe_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles ResizeMe.MouseMove

    If e.Button = MouseButtons.Left Then

    MoveWindow(Me.Handle, Me.Location.X, Me.Location.Y, (Control.MousePosition.X - (Me.Left)) + 10, (Control.MousePosition.Y - Me.Top) + 10, True)
    Me.Refresh()
    System.Windows.Forms.Application.DoEvents()

    End If

contributed by http://kaleemsoft.com

Alternative Managed API:

Omnicoder's Managed Windows API: http://www.fileden.com/files/2008/4/5/1852663/ManWinAPI.zip

Additional Uses (Contributed by Hayden B):

I always enjoyed how when you typed an incorrect password on a mac the window shakes itself back and forth like it's saying no. Here's a simple piece of code you could use in a login form to do just that.

VB code:

    Public Declare Auto Function MoveWindow Lib "user32.dll" ( _
      ByVal hWnd As IntPtr, _
      ByVal X As Int32, _
      ByVal Y As Int32, _
      ByVal nWidth As Int32, _
      ByVal nHeight As Int32, _
      ByVal bRepaint As Boolean _
      ) As Boolean
    Private InitX As Integer
    Private LR As String = "L"
    Private C As Integer = 0
    Private X As Integer = 0

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    InitX = Me.Location.X
    X = InitX
    C = 0
    Timer1.Interval = 1
    Timer1.Start()
    End Sub

    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
    C += 1
    If X = InitX - 6 Then
        LR = "R"
    ElseIf X = InitX + 6 Then
        LR = "L"
    End If

    If LR = "L" Then
        X = X - 2
    Else
        X = X + 2
    End If

    MoveWindow(Me.Handle, X, Me.Location.Y, Me.Width, Me.Height, True)
    Me.Refresh()
    System.Windows.Forms.Application.DoEvents()
    If C = 30 Then
        Timer1.Stop()
    End If
    End Sub

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