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can you show me a Sample of 2 Combobox where 2nd Combobox depend on 1st combobox using fivewin command syntax

Sure, here's an example of how to create two comboboxes where the options available in the second combobox depend on the selection made in the first combobox using the Fivewin command syntax:

Code: Select all | Expand

#include "fw.ch"
FUNCTION Main()
   DEFINE WINDOW Form_1 ;
      AT 0,0 ;
      WIDTH 300 ;
      HEIGHT 200 ;
      TITLE 'Combobox Example' ;
      MAIN
      DEFINE COMBOBOX Combo_1
         ROW 20 ;
         COL 20 ;
         WIDTH 100 ;
         HEIGHT 24 ;
         FONT 'Arial', 10, FW_NORMAL
         ADDITEMS {'Option 1', 'Option 2', 'Option 3'} TO Combo_1
      END COMBOBOX
      DEFINE COMBOBOX Combo_2
         ROW 20 ;
         COL 140 ;
         WIDTH 100 ;
         HEIGHT 24 ;
         FONT 'Arial', 10, FW_NORMAL
         ITEMS {'Sub-Option 1', 'Sub-Option 2', 'Sub-Option 3'}
      END COMBOBOX
   END WINDOW
   ACTIVATE WINDOW Form_1

   // Bind a handler to the first combobox to update the options in the second combobox
   COMBO_1:Change := {|| UpdateCombo2()}

   PROCEDURE UpdateCombo2()
      LOCAL selectedOption := Combo_1:Value

      // Clear the options in the second combobox
      Combo_2:ClearItems()

      // Add new options based on the selected option in the first combobox
      IF selectedOption = 'Option 1'
         Combo_2:AddItems({'Sub-Option 1', 'Sub-Option 2'}) TO Combo_2
      ELSIF selectedOption = 'Option 2'
         Combo_2:AddItems({'Sub-Option 3', 'Sub-Option 4'}) TO Combo_2
      ELSIF selectedOption = 'Option 3'
         Combo_2:AddItems({'Sub-Option 5', 'Sub-Option 6'}) TO Combo_2
      ENDIF
   RETURN
END FUNCTION

In this example, we create a window with two comboboxes, Combo_1 and Combo_2. Combo_1 has three options: Option 1, Option 2, and Option 3. Combo_2 initially has three sub-options: Sub-Option 1, Sub-Option 2, and Sub-Option 3.

We then bind a handler to Combo_1's Change event using the COMBO_1:Change := {|| UpdateCombo2()} statement. This handler, UpdateCombo2(), is called whenever Combo_1's selection changes.

Inside UpdateCombo2(), we first get the selected option from Combo_1 using Combo_1:Value. We then clear the options in Combo_2 using Combo_2:ClearItems(). Finally, we add new options to Combo_2 based on the selected option in Combo_1. In this example, if Option 1 is selected in Combo_1, Sub-Option 1 and Sub-Option 2 are added to Combo_2; if Option 2 is selected, Sub-Option 3 and Sub-Option 4 are added; and if Option 3 is selected, Sub-Option 5 and Sub-Option 6 are added.

Note that the syntax and function calls used in this example may vary depending on the version of Fivewin you are using.