BUG: Data Written to Table Despite Textbox Returning False

MORE INFORMATION

This behavior also occurs when you use visual development tools instead of code to create the form and grid.

Steps to Reproduce Behavior

1. Create a program that contains the following code:

         CREATE TABLE TestTable (Field1 c(1))
         APPEND BLANK
   
         PUBLIC oForm1
         oForm1 = CREAT('Form')
         oForm1.SHOW
   
         oForm1.ADDOBJECT('Grid1','GridClass')
         oForm1.Grid1.VISIBLE = .T.
   
         DEFINE CLASS GridClass AS GRID
            ADD OBJECT column1 AS ColumnClass
            RECORDSOURCE = 'TestTable'
            RECORDSOURCETYPE = 1
         ENDDEFINE
   
         DEFINE CLASS TextClass AS TEXTBOX
            PROC VALID
            RETURN .F.
         ENDDEFINE
   
         DEFINE CLASS ColumnClass AS COLUMN
            ADD OBJECT text1 AS TextClass
         ENDDEFINE

2. Run the program and type a letter in the text box of the first column of the grid. A wait window appears informing you of the invalid input. Clear the wait window and close the form. Another wait window appears when you close the form. Ignore it.
3. Type the following in the Command window:

   BROWSE

RESULT: The letter you typed in step 2 appears in the table even though the textbox object returned false.

If the text box simply resides on the form instead of within a grid and its Valid event returns false, the form does not close. You would be in an endless loop and unable to close Visual FoxPro.