Via the menu item Code Generation ▹ Insert Code (also accessible as tool bar button or as button inside the tab Code Generation), you can insert the code that is generated according to the current settings of the Measure Assistant into the Program Window.
Via the menu item Code Generation ▹ Release Generated Code Lines you can release the generated and inserted code lines. After releasing the code lines, all connections between the Measure Assistant and the Program Window of HDevelop are lost. That is, changes, for example, the deletion of code lines, can only be applied directly in the Program Window and not from within the Measure Assistant any more.
Via the menu item Code Generation ▹ Delete Generated Code Lines you can delete the code lines that you have previously generated and inserted into the Program Window of HDevelop from within the Measure Assistant. Note that this works only as long as you have not yet released the code lines.
Via the menu item Code Generation ▹ Show Code Preview you can open the dialog for the Code Preview in the tab Code Generation.