Now I am doing experiences,and encountered a problem: I browse files with "filelistbox control",but file name is verylong,I don't look all words. So, I take advantage of API(sendmessage),
for example,
SendMessage file1.hwnd, LB_SETHORIZONTALEXTENT, file1.Width+100,0
but in runtime,I cannot see horizontal scroll.

How about should I do ?

help me