C# Signature:

[DllImport("user32.dll")]
static extern bool RedrawWindow(IntPtr hWnd, [In] ref RECT lprcUpdate, IntPtr hrgnUpdate, RedrawWindowFlags flags);
static extern bool RedrawWindow(IntPtr hWnd, [In] ref RECT lprcUpdate, IntPtr hrgnUpdate, uint flags);

[DllImport("user32.dll")]
static extern bool RedrawWindow(IntPtr hWnd, IntPtr lprcUpdate, IntPtr hrgnUpdate, RedrawWindowFlags flags);
static extern bool RedrawWindow(IntPtr hWnd, IntPtr lprcUpdate, IntPtr hrgnUpdate, uint flags);

VB.NET Signature:

<DllImport("user32.dll")> _
Private Shared Function RedrawWindow(hWnd As IntPtr, <[In]> ByRef lprcUpdate As RECT, hrgnUpdate As IntPtr, flags As RedrawWindowFlags) As Boolean
Private Shared Function RedrawWindow(hWnd As IntPtr, <[In]> ByRef lprcUpdate As RECT, hrgnUpdate As IntPtr, flags As UInteger) As Boolean
End Function

<DllImport("user32.dll")> _
Private Shared Function RedrawWindow(hWnd As IntPtr, lprcUpdate As IntPtr, hrgnUpdate As IntPtr, flags As RedrawWindowFlags) As Boolean
Private Shared Function RedrawWindow(hWnd As IntPtr, lprcUpdate As IntPtr, hrgnUpdate As IntPtr, flags As UInteger) As Boolean
End Function

User-Defined Types:

RECT, RedrawWindowFlags

None.

Tips & Tricks:

Please add some!

Notes:

RedrawWindow() flags:

Sample Code:

    private void InvalidateWindow()
    {
        WinAPI.RedrawWindow(this.Handle, IntPtr.Zero, IntPtr.Zero,
         0x0400/*RDW_FRAME*/ | 0x0100/*RDW_UPDATENOW*/
         | 0x0001/*RDW_INVALIDATE*/);
    }
const int RDW_INVALIDATE      =0x0001;
const int RDW_INTERNALPAINT   =0x0002;
const int RDW_ERASE       =0x0004;

const int RDW_VALIDATE    =0x0008;
const int RDW_NOINTERNALPAINT =0x0010;
const int RDW_NOERASE     =0x0020;

const int RDW_NOCHILDREN      =0x0040;
const int RDW_ALLCHILDREN     =0x0080;

const int RDW_UPDATENOW       =0x0100;
const int RDW_ERASENOW    =0x0200;

const int RDW_FRAME       =0x0400;
const int RDW_NOFRAME     =0x0800;

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

Alternative Managed API:

Do you know one? Please contribute it!

Tips & Tricks:

Please add some!

Sample Code:

    private void InvalidateWindow()
    {
        WinAPI.RedrawWindow(this.Handle, IntPtr.Zero, IntPtr.Zero,
         0x0400/*RDW_FRAME*/ | 0x0100/*RDW_UPDATENOW*/
         | 0x0001/*RDW_INVALIDATE*/);
    }

Alternative Managed API:

Do you know one? Please contribute it!

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