Sets the check state of the item at the specified index.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The following example enumerates the items in the CheckedListBox and checks every other item in the list. The example demonstrates using the and SetItemChecked methods to set the check state of an item. For every other item that is to be checked, is called to set the CheckState to Indeterminate, while SetItemChecked is called on the other item to set the checked state to Checked.
Private Sub CheckEveryOther_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles CheckEveryOther.Click ' Cycle through every item and check every other. Dim i As Integer ' Set flag to true to know when this code is being executed. Used in the ItemCheck ' event handler. insideCheckEveryOther = True For i = 0 To CheckedListBox1.Items.Count - 1 ' For every other item in the list, set as checked. If ((i Mod 2) = 0) Then ' But for each other item that is to be checked, set as being in an ' indeterminate checked state. If ((i Mod 4) = 0) Then CheckedListBox1.SetItemCheckState(i, CheckState.Indeterminate) Else CheckedListBox1.SetItemChecked(i, True) End If End If Next insideCheckEveryOther = False End Sub