Computer Programming Concepts and Visual Basic David I. Schneider

340 Computer Programming Concepts and Visual Basic
End If
End Sub
Private Sub Form_Load()
msgCities.ColWidth(0) = 1000 ‘Widen the first column slightly
End Sub
[Run]
[Click on the command button.]
■ USING THE DATA-BOUND LIST BOX AND COMBO BOX CONTROLS
The data-bound list box and data-bound combo box controls look like the standard list box and
combo box controls. They are often used with data-entry forms to speed data entry and ensure
that valid data is entered. These controls automatically fill with a column from a table or
recordset after you set a few properties. Note that the data-bound controls display data from
a table or a recordset. Therefore, three methods (AddItem, Clear, and RemoveItem) and two
properties (ListCount and Sorted) used with the regular list box and combo box are not available
with the data-bound controls. The count of items displayed in a data-bound control is determined
by the RecordCount property of the recordset.
Two key properties determine the entries of a data-bound list or combo box—Row-
Source and ListField. RowSource specifies a data control, and ListField specifies a field
from the data control’s table or recordset. That field will be used to fill the list.
EXAMPLE 2
The data-bound list box in the following example displays the countries in the Countries table of
MEGACTY2.MDB. When the command button is clicked, SQL is used to sort the countries by their 1995