OnPaintWatermark Event

Declaration C#

OnPaintWatermark(

  Object Sender,

  int Editor,

  int Mode,

 Graphics Canvas,

  float X, float Y, float X1, float Y1, float Xres, float Yres);

The .NET assembly uses different parameters than the OCX for this event type.

It passes the coordinates and the resolution as floating point variables and instead of a device handle (HDC) it passes a reference to a .NET Graphics object as drawing surface "Canvas".

Declaration OCX

OnPaintWatermark(ByVal Editor As Long, ByVal Mode As Long, ByVal DC As Long, ByVal X As Long, ByVal Y As Long, ByVal X1 As Long, ByVal Y1 As Long, ByVal Xres As Long, ByVal Yres As Long)

This event can be used to paint into the background of any page.

( If you need to select a watermark which was loaded using Command(143) please use OnNotify. Example. )

Parameters:

The page rectangle and specified by X,Y,X1,Y1. This values are based on the resolution specified by XRes ansd YRes.

The lower 3 bytes of parameter "Mode" is the current page number.

In the higher word this bits are used:

0x1000000 : we are currently printing

0x2000000 : we are painting inside the editor

0x4000000 : we are currently exporting to PDF

Example:

private void OnPaintWatermark(object Sender, int Editor, int Mode,

   System.Drawing.Graphics Canvas, float X, float Y,

   float X1, float Y1, float Xres, float Yres)

{

   int XMargin = (int)(Xres/2.54);

   int YMargin = (int)(Yres/2.54);

   Canvas.DrawRectangle(System.Drawing.Pens.Black, X+XMargin, Y+YMargin, X1-XMargin*2, Y1-YMargin*2);

   // Draw the page number as vertical text

   String drawString = "Page " + ((Mode & 0xFFFFF) + 1).ToString();

   Font drawFont = new Font("Arial", 11);

   SolidBrush drawBrush = new SolidBrush(Color.Red);

   StringFormat drawFormat = new StringFormat();

   drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;

   // Draw in upper left corner

   Canvas.DrawString( drawString, drawFont, drawBrush, X, Y, drawFormat);

}