Server behaviors often require that the page designer supply a parameter value. This value must be inserted before the server behavior’s code is inserted into the page.
You create the dialog box by defining the designer-supplied parameters in the code. Then you generate a dialog box for the server behavior, which prompts the page designer for a parameter value.
You can also highlight the string and click the Insert Parameter In Code Block button. Enter a parameter name and click OK. Dreamweaver replaces every instance of the highlighted string with the specified parameter name enclosed in parameter markers.
Dreamweaver uses the strings that you enclose in parameter markers to label the controls in the dialog box it generates (see the following procedure). In the previous example, Dreamweaver creates a dialog box with the following label: