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Posted: **Sat Oct 31, 2009 8:40 pm**

hi guys,
i have created a textbox, lets call is txtHistory, type=string.
now, when user has clicked inside the text box, i dont want him to be able to move backwords.

the reason i want this so whatever is the previous value is there, it cant be overwritten and he can only add data in addition to the existing data inside the textbox.

Is it possible?

thnx

Posted: **Sun Nov 01, 2009 2:08 am**

You could make a subclass of TextBox whose keyPress method does this:

Code: Select all

keyPress(textbox: TextBox input; keyCharCode: Integer io) updating, clientExecution;

vars

begin
	inheritMethod(textbox, keyCharCode);
	
	if keyCharCode = J_key_Back then
		keyCharCode := 0;
	endif;
	
end;

Or you could filter it on the form like this:

Code: Select all

keyDown(keyCode: Integer io; shift: Integer) updating;

vars

begin
	if keyCode = J_key_Back then
		keyCode := 0;
	endif;

end;

This option will keep any controls on the form from receiving backspace key presses, so you'd probably have to add some code to only do that if specific controls had focus.

Posted: **Sun Nov 01, 2009 9:36 am**

thanks and how can i also disable the delete key?

cheers, mario

Posted: **Sun Nov 01, 2009 9:37 am**

spoke too early...figured it out

many thanks

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