Incompatible types?

[Cogz]

In the line:

lstbx is a listbox.

---
if lstbx1.ItemIndex + 1 > lstbx1.Count and lstbx1.Count > 0 then
---

I get "incompatible types" error.

So now I would either have to use an object property with a constant value of 0, or waste memory by creating variables that hold the needed lstbx1 properties.

Am I missing something or is there a better way?

 

[Griffyn]

Hi there,

What you're missing are parentheses. Try this:

if (lstbx1.ItemIndex + 1 > lstbx1.Count) and (lstbx1.Count > 0) then

This works because when the compiler looks at this line, it simply reads from left to right and compares the boolean result of "lstbx1.ItemIndex + 1 > lstbx1.Count" which will equal True, and then tries to evaluate the expression of "True and lstbx1.Count".

The parenthesis force the logic to be evaluated the way you're expecting. Any and/or expression should use parentheses in this way.

 

[Cogz]

Great, it works.


tnx Griffyn