pinvoke.net: Edit: user32.GetWindowPlacement

@msdn=http://search.microsoft.com/search/results.aspx?qu=$$$
@pinvoke=http://pinvoke.net/$$$.htm

Summary: The GetWindowPlacement API

!!!!C# Signature:
 /// <summary>
 /// Retrieves 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 the WINDOWPLACEMENT structure that receives the show state and position information.
 /// <para>
 /// Before calling GetWindowPlacement, set the length member to sizeof(WINDOWPLACEMENT). GetWindowPlacement fails if lpwndpl-> length 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)]
 internal static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);

!!!!VB.NET Signature:
 <DllImport("user32.dll")> _
 Private Shared Function GetWindowPlacement(ByVal hWnd As IntPtr, ByRef lpwndpl As WINDOWPLACEMENT) As Boolean
 End Function
!!!!VB Signature:
 Public Declare Function GetWindowPlacement Lib "user32" _
                  (ByVal hWnd As Long, _
                   ByRef lpwndpl As WINDOWPLACEMENT) As Long
!!!!User-Defined Types:
[WINDOWPLACEMENT]

!!!!Notes:
None.

!!!!Tips & Tricks:
For C# only: It seems you have to do rcNormalPosition.Width - rcNormalPosition.X to get the actual width because "Width" is actually a "Right", same goes for height.

!!!!C# Sample Code:

public class Sample
 {

[DllImport("user32.dll")] 
        [return: MarshalAs(UnmanagedType.Bool)]
	static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);

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;
        }

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;

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

!!!!VB Sample Code:

Public Class Form1

Private Declare Function GetWindowPlacement Lib "user32" (ByVal hwnd As IntPtr, ByRef lpwndpl As WINDOWPLACEMENT) As Integer

Private Structure POINTAPI
                 Public x As Integer
                 Public y As Integer
    End Structure

Private Structure RECT
                 Public Left As Integer
                 Public Top As Integer
                 Public Right As Integer
                 Public Bottom As Integer
    End Structure

Private Structure WINDOWPLACEMENT
                 Public Length As Integer
                 Public flags As Integer
                 Public showCmd As Integer
                 Public ptMinPosition As POINTAPI
                 Public ptMaxPosition As POINTAPI
                 Public rcNormalPosition As RECT
    End Structure
 
 
    Private Sub Form1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Click

Dim intRet As Integer
            Dim wpTemp As WINDOWPLACEMENT

wpTemp.Length = System.Runtime.InteropServices.Marshal.SizeOf(wpTemp)
            intRet = GetWindowPlacement(Me.Handle.ToInt32, wpTemp)

If wpTemp.showCmd = 1 Then
            	'normal
            ElseIf wpTemp.showCmd = 2 Then
            	'minimized
            ElseIf wpTemp.showCmd = 3 Then
            	'maximized
            End If
            'Stop

End Sub

End Class

!!!!Alternative Managed API:
The ManagedWindowsApi project (http://mwinapi.sourceforge.net) provides a 
class ManagedWinapi.SystemWindow that has a Position property.

Documentation: GetWindowPlacement@msdn on MSDN