请帮我解释这个是什么意思

mxc0709

    If IsNull(Pro) Or Trim(Pro) = "" Then

        Socket.RowSource = ""

        Socket = Null

    Else

        Socket.RowSource = "SELECT mKey, tKey FROM tBSocket WHERE Corr = " & Pro & " ORDER BY tKey"

    End If

zyp

是给表单控件socket重新指定数据源。If IsNull(Pro) Or Trim(Pro) = "" Then     '检测变量是否为空

        Socket.RowSource = ""     '若为空,则清除控件的数据源

        Socket = Null      '重设控件值为空

Else     '变量不为空

        Socket.RowSource = "SELECT mKey, tKey FROM tBSocket WHERE Corr = " & Pro & " ORDER BY tKey"     '重新指定数据源

End If

mxc0709

谢谢！

accessone

hi