How to Change a Method at Run Time

• Microsoft Visual FoxPro for Windows, versions 3.0 and 3.0b

SUMMARY

All methods are read-only at run time. You can, however, have several methods and decide at run time which method to execute. This article shows you how.

MORE INFORMATION

Step-by-Step Example

1. Create a new form.

2. Place a command button (Command1) on the form, and add the following code to its Click event:

   lcTemp=ThisForm.gcCurrentclk &lcTemp

3. Place an Option Group on the form, and add the following code to its Click event:

   IF This.Value=1

        ThisForm.gcCurrentclk="ThisForm.Click1"
   

   ELSE

        ThisForm.gcCurrentclk="ThisForm.Click2"
   

   ENDIF

4. Create a new form property called gcCurrentclk, and assign ThisForm.Click1 to gcCurrentclk.

5. Create a new Form method called Click1, and place the following in the Form.Click1 method:

   WAIT WINDOW "Click #1"

6. Create a new method called Click2, and place the following code in the Form.Click2 method:

   WAIT WINDOW "Click #2"

7. Run the form.

NOTE: The Click event for the command button does not have to be a method of the current form. For example:

gcCurrentclk="DO myprog.PRG" would execute a program. gcCurrentclk="oMyclass.Click1" would execute a method of an external class. gcCurrentclk="WAIT WINDOW" would execute a wait window.