Using System variable built-ins

Question

Please suggest built-in to use in when-button-pressed trigger to navigate to block items
depending on which block the form is in. I used :system.cursor_block but nothing happens
when I click on button with it.
For button with when-button-pressed trigger I have
Declare
curblk varchar2(30);
Begin
curblk : = :system.cursor_block;
if curblk = 'block A'
then go_item('blockA.itemA');
show_view('blockA_canvas');
elsif curblk = 'blockB'
then go_item('blockB.itemB');
show_view('blockB_canvas');
elsif curblk = 'block C'
then go_item('blockC.itemC');
show_view('blockC_canvas');
end if;
End;

Answer 1

What are you trying to achieve? Based on your code example, it looks like you want to navigate to a specific item (say the first navigable item) in block if the user clicks on a button.
As to why your code doesn't work, I'm going to guess the reason nothing is happening is because you have the "Mouse Navigate" and "Keyboard Navigate" properties of your button set to YES. If this is the case, when you click on the button forms actually navigates to the button. This happens before the trigger behind the button is executed. Therefore, the cursor is always on in the block where the button is defined. If you want the button to evaluate the block/item of current item, set these properties to NO.
Aweiden is right, SYSTEM variables are stored in Upper Case and spaces are not allowed.
Hope this helps,
Craig...