internal static extern bool ScrollWindow(IntPtr hWnd, int XAmount, int YAmount, ref RECT lpRect, ref RECT lpClipRect);
public static extern int FillRect(IntPtr hDC, ref RECT rect, IntPtr hBrush);
static public extern int ScrollWindowEx(IntPtr hWnd, int dx, int dy,ref RECT rcScroll, ref RECT rcClip, IntPtr UpdateRegion, ref RECT rcInvalidated, uint flags);
public extern static int GetClientRect(IntPtr hWnd, ref RECT rc);
public static extern bool GetWindowRect(IntPtr hWnd, ref RECT rect);
public extern static int DrawText(IntPtr hdc, string lpString, int nCount, ref RECT lpRect, int uFormat);
public static extern void SendMessage(IntPtr hWnd, int msg, int wParam, ref RECT lParam);
static public extern bool GetMenuItemRect(IntPtr hWnd, IntPtr hMenu, uint Item, ref RECT rc);
internal static extern int DrawThemeBackground(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, ref RECT pRect, ref RECT pClipRect);
public static extern int DrawThemeTextEx(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, string text, int iCharCount, int dwFlags, ref RECT pRect, ref DTTOPTS pOptions);