vb.net - Loading items in Combobox -

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i working on project , problem have is; items of combobox being loaded database table(one field); table has more 1000 records:

how can load these records(one field) items giving limit of 50 while allowing user wants see of records through combobox see them still group of 50?

which event can best loading items combobox? textchanged, click....

i thinking use vertical scroll bar when user @ end of displayed items next 50 loaded , if on first , scrolls previous 50 loaded:problems way of thinking are:

  1. when user typed caracter word wanna select items' list if not loaded yet db obliged type whole word
  2. i don't know event raised when scroll bar of reaches end or @ beginning

is there other way that?


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