/// <summary>DCX_LOCKWINDOWUPDATE: Allows drawing even if there is a LockWindowUpdate

    LockWindowUpdate = 0x00000400,

static extern bool LockWindowUpdate(IntPtr hWndLock);

Public Shared Function LockWindowUpdate(ByVal hWndLock As IntPtr) As Boolean

Declare Function LockWindowUpdate Lib "user32" Alias "LockWindowUpdate" (ByVal hwndLock As Long) As Long

The LockWindowUpdate function disables or enables drawing in the specified window. Only one window can be locked at a time.

LockWindowUpdate(panelContainer.Handle);

LockWindowUpdate(IntPtr.Zero);

    /// <summary>DCX_LOCKWINDOWUPDATE: Allows drawing even if there is a LockWindowUpdate

    LockWindowUpdate = 0x00000400,

    ''' <summary>DCX_LOCKWINDOWUPDATE: Allows drawing even if there is a LockWindowUpdate

    LockWindowUpdate = &H400