C# Signature:

[DllImport("user32.dll")]
[return: MarshalAs(UnmanagedType.Bool)]
static extern bool GetWindowRect(HandleRef hWnd, out RECT lpRect);

VB Signature:

<DllImport("user32.dll")> _
Public Shared Function GetWindowRect(ByVal hWnd As IntPtr, ByRef lpRect As RECT) As Boolean
End Function

Public Overloads Declare Function GetWindowRect Lib "User32" Alias "GetWindowRect" (ByVal hWnd As IntPtr, ByRef lpRect As RECT) As Int32
Public Overloads Shared Function GetWindowRect(ByVal hWnd As IntPtr) As System.Drawing.Rectangle
     Dim r As New RECT
     GetWindowRect(hWnd, r)
     Return r.ToRectangle
End Function
Public Overloads Shared Function GetWindowRect(ByVal hWnd As Int32) As System.Drawing.Rectangle
     Return GetWindowRect(New IntPtr(hWnd))
End Function

User-Defined Types:

RECT

Notes:

The Win32 RECT is not binary compatible with System.Drawing.Rectangle.

Tips & Tricks:

For .NET CF you may need to replace user32.dll with coredll.dll

Please add some!

Sample Code:

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);

        [StructLayout(LayoutKind.Sequential)]
        public struct RECT
        {
            public int Left;    
            public int Top;    
            public int Right;    
            public int Bottom;
        }

        private void button1_Click(object sender, System.EventArgs e)
        {
            RECT rct;

            if(!GetWindowRect(new HandleRef(this, this.Handle), out rct ))
            {
                MessageBox.Show("ERROR");
            }
            else
            {
                MessageBox.Show( rct.ToString() );
            }
        }

Alternative Managed API:

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

Please edit this page!

Do you have...

• helpful tips or sample code to share for using this API in managed code?
• corrections to the existing content?
• variations of the signature you want to share?
• additional languages you want to include?

Select "Edit This Page" on the right hand toolbar and edit it! Or add new pages containing supporting types needed for this API (structures, delegates, and more).