| UserName | Specifies the name of the user who can edit the region. This parameter can be an empty string to indicate, that no user name has been specified and the region can be edited by everyone. |
| UserId | Optional. Specifies the editable region's user identifier. It must be a one-based value. A value of zero indicates that the editable region has no identifier. |
| HighLightColor | Optional. Specifies the highlight color for the editable region. If this parameter is omitted, TextControl calculates an highlight color depending on the user name. Text Control uses the Microsoft Windows operating environment red-green-blue (RGB) color scheme. The valid range for a RGB color is 0 to &HFFFFFF. The high byte of a number in this range equals 0; the lower 3 bytes, from least to most significant byte, determine the amount of red, green, and blue, respectively. The red, green, and blue components are each represented by a number between 0 and 255 (&HFF). |
| AlphaHighLight | Optional. Specifies the alpha value of the highlight color. It must be a value between 0 and 255. (0: transparent, 255: opaque). The color's alpha value must be less than 255 (opaque) so that the editable region's text remains visible. |
