// Determine the length of a control's Text. Required since using the
// RichTextBox .Length property wipes out the Undo/Redo buffer.
public static int GetTextLength(IntPtr hControl)
{
GETTEXTLENGTHEX lpGTL = new GETTEXTLENGTHEX();
lpGTL.uiFlags = 0;
lpGTL.uiCodePage = 1200; // Unicode
return(SendMessage(hControl, EM_GETTEXTLENGTHEX, ref lpGTL, IntPtr.Zero));
}
public static int GetTextLength(RichTextBox rt)
{
GETTEXTLENGTHEX GTL = new GETTEXTLENGTHEX();
GTL.uiFlags = GTL_DEFAULT;
GTL.uiCodePage = CP_UNICODE;
return((int)SendMessage(rt.Handle, (IntPtr)EM_GETTEXTLENGTHEX, ref GTL, IntPtr.Zero));
}
static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, ref GETTEXTLENGTHEX wParam, IntPtr lParam);
private static extern int SendMessage(IntPtr hWnd, IntPtr msg, ref GETTEXTLENGTHEX wParam, IntPtr lParam);
public static int GetTextLength(RichTextBox rt)
{
GETTEXTLENGTHEX GTL = new GETTEXTLENGTHEX();
GTL.uiFlags = GTL_DEFAULT;
GTL.uiCodePage = CP_UNICODE;
return (int)SendMessage(rt.Handle, (IntPtr)EM_GETTEXTLENGTHEX, ref GTL, IntPtr.Zero);
}
internal static extern int SendMessage(IntPtr hWnd, int msg, ref GETTEXTLENGTHEX wParam, int lParam);
static extern IntPtr SendMessage(IntPtr hWnd, int wMsg, ref GETTEXTLENGTHEX wParam, IntPtr lParam);
public static extern int SendMessage(IntPtr hWnd, int Msg, ref GETTEXTLENGTHEX wParam, IntPtr lParam);
public static extern int GetTextLength(IntPtr hWnd, int Msg, ref GETTEXTLENGTHEX wParam, StringBuilder lParam);
private static extern void RichTextBox_GetTextLengthEx(out GETTEXTLENGTHEX value);
private static extern int SendMessage(IntPtr hWnd, IntPtr msg, ref GETTEXTLENGTHEX wParam, IntPtr lParam);