I just finished implementing a new feature for the FireTextBox custom control. It is a new property called "RightAlignText". This allows your display and data input to be right justified. It is especially useful for inputting numeric data whereby the numeric text will now grow from right to left rather than the standard left to right.
Essentially by setting this property to TRUE, I am destroying the child edit control and recreating it with the ES_RIGHT window style because the ES_RIGHT and ES_LEFT styles can not be set on-the-fly via SetWindowLong.
This new feature will be in the 3.10 update.