Problem with listbox horizontal scrollbar

[markusszil]

Hello all

I have a fairly simple listbox into which I add, insert, and remove strings

It has the following property settings
HorizontalScrol lbar - true
HorizontalExten t -
ScrollAlwaysVis ible - Fals

The problem I am having is that the horizontal scrollbar range doesn't work right. If I add a string, the first time the sting width exceeds the control width the bar appears, but it's off by a few pixels so the last character is truncated. If I add longer items, it doesn't update so I can't see the end of them. If I insert items, it never updates. Delete only seems to work if the entire horizontal scrollbar should disappear

I ended up writing code (at end of this post) which goes through all the strings and uses the Graphics.Measur eString method, then sets HorizontalExten t to the maximum result. It works, but seems very cumbersome - and I can't find an event which fires when the Items-collection changes which could simply call this method. Instead, I need to go through my code and add calls to this at any point the collection might change

Is this a known issue with listboxes or am I doing something dumb. I can't believe proper scrollbar operation requires added code

Any tips appreciated
Marku

Here is the code I had to add

private void UpdateHorzScrol l()

Graphics g=Graphics.From Hwnd(Handle)
int wid=0
foreach (object obj in MyListBox.Items )

int swid=(int)(g.Me asureString(obj as string,Font).Wi dth)
if (swid > wid) wid=swid

MyListBox.Horiz ontalExtent=wid