Description: VB input ComboBox input box is checked, the value in the drop-down ComboBox, input error will be prompted. Temporary tag to get the focus, so the combo box to lose focus, and validity check when they lose focus, if the input data is not in the list, please re-enter.
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Example对ComboBox的输入进行检查\Form1.frm
...............................\工程1.vbp
...............................\工程1.vbw
Example对ComboBox的输入进行检查
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