5) Creating a Screen

In Screen Designer:

1. Drag a Label onto the Screen window, and in the Properties window (right), set the following:
   1. Name - lblPrompt (Fig. 2).

      

      Fig. 2 - Example Label Prompt

2. Drag a Validation Textbox onto the Screen window, and set the following (as Fig. 3):
   1. CompletionRegex - select Decimal numbers,
   2. Name - type tbUserResult,
   3. PreviewRegex - type [0-9]+,

      

      Fig. 3 - Example Validation Textbox

   Although the CompletionRegex setting allows decimal numbers to be entered, setting the PreviewRegex field as shown will only allow integer values to be entered by the user.

3. Drag a Button onto the Screen window, and set the following (as Fig. 4):
   1. ButtonAction - leave set to Outcome,
   2. ButtonOutcome - type OK,
   3. Content - type OK,
   4. IsEnabled - uncheck,
   5. Validate - check.

   

   Fig. 4 - Example Button

   Unchecking IsEnabled and checking Validate means that the OK button will only be enabled when a valid value is entered into the Validation Textbox. If more than one validation control was present on the screen, the OK button would only be enabled if all validation controls contained valid input.

4. Exit the Screen Designer, saving your changes.