C# Signature:

/// <summary>
/// Sets the show state and the restored, minimized, and maximized positions of the specified window.
/// </summary>
/// <param name="hWnd">
/// A handle to the window.
/// </param>
/// <param name="lpwndpl">
/// A pointer to a WINDOWPLACEMENT structure that specifies the new show state and window positions.
/// <para>
/// Before calling SetWindowPlacement, set the length member of the WINDOWPLACEMENT structure to sizeof(WINDOWPLACEMENT). SetWindowPlacement fails if the length member is not set correctly.
/// </para>
/// </param>
/// <returns>
/// If the function succeeds, the return value is nonzero.
/// <para>
/// If the function fails, the return value is zero. To get extended error information, call GetLastError.
/// </para>
/// </returns>
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool SetWindowPlacement(IntPtr hWnd,
   [In] ref WINDOWPLACEMENT lpwndpl);

VB.NET Signature:

VB Signature:

<DllImport("user32.dll")> _
Public Shared Function SetWindowPlacement( _
     ByVal hWnd As IntPtr, _
     ByRef lpwndpl As WINDOWPLACEMENT) As Boolean
End Function

VB Signature

Public Declare Function SetWindowPlacement Lib "user32" _
         (ByVal hWnd As Long, _
          ByRef lpwndpl As WINDOWPLACEMENT) As Long

User-Defined Types:

WINDOWPLACEMENT

RECT

POINT

WINDOWPLACEMENT.

ShowState

Notes:

The Win32 RECT structure is not compatible with the .NET System.Drawing.Rectangle structure.

None.

The RECT structure has left, top, right, and bottom members but System.Drawing.Rectangle uses left, top, width, and height.

Tips & Tricks:

See WINDOWPLACEMENT for more info. Also read the MSDN documentation carefully.

Please add some!

Sample Code:

private void GetPlacement()
{
        WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
        placement.length = Marshal.SizeOf(placement);
        GetWindowPlacement(this.Handle, ref placement);
}

Alternative Managed API:

//Import the DLL
[DllImport("user32.dll")]
static extern bool SetWindowPlacement(IntPtr hWnd,
[In] ref WINDOWPLACEMENT lpwndpl);

The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a

class ManagedWinapi.SystemWindow that has a Position property.

  //Definition for Window Placement Structure
  [StructLayout(LayoutKind.Sequential)]        
  private struct WINDOWPLACEMENT
       {
    public int length;
    public int flags;
    public int showCmd;
    public System.Drawing.Point ptMinPosition;
    public System.Drawing.Point ptMaxPosition;
    public System.Drawing.Rectangle rcNormalPosition;
    }

   //Definitions For Different Window Placement Constants
       const UInt32 SW_HIDE =     0;
       const UInt32 SW_SHOWNORMAL =       1;
       const UInt32 SW_NORMAL =       1;
       const UInt32 SW_SHOWMINIMIZED =    2;
       const UInt32 SW_SHOWMAXIMIZED =    3;
       const UInt32 SW_MAXIMIZE =     3;
       const UInt32 SW_SHOWNOACTIVATE =   4;
       const UInt32 SW_SHOW =     5;
       const UInt32 SW_MINIMIZE =     6;
       const UInt32 SW_SHOWMINNOACTIVE =  7;
       const UInt32 SW_SHOWNA =       8;
       const UInt32 SW_RESTORE =      9;

WINDOWPLACEMENT param = new WINDOWPLACEMENT();

param.length = Marshal.SizeOf(typeof(WINDOWPLACEMENT));

param.showCmd = 1; //SW_SHOWNORMAL

SetWindowPlacement(this.Handle, ref param);

Alternative Managed API:

The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a

class ManagedWinapi.SystemWindow that has a Position property.

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