RichTextEdit controls
The TopMargin property specifies the size in inches of the top margin on the printed page.
To set the top margin:
Enter the desired size in inches in the Top Margin field of the Document tab page of the RichTextEdit control’s Property view.
The TopMargin property takes a long value. The following line sets the top margin of a RichTextEdit to 1 inch.
rte_1.TopMargin = 1