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