在 asp.net c# 中如何调用 access的自定义函数？

sqlstr = "select count(pno)  from person where plevel>=" + iY0 + " and  plevel<=" + mtmpplevelaward + " and xplace<=MyPower(2,plevel-" + iY0 + ")*" + iX0 + "  and  xplace>=MyPower(2,plevel-" + iY0 + ")*" + iX0 + "-MyPower(2,plevel-" + iY0 + ")+1";

提示

:運算式中未定義的 'MyPower' 函數。

Public Function MyPower(dishu As Integer, zhishu As Integer) As Variant

    Dim iC As Integer
    Dim i As Integer
    iC = 1
    
    For i = 1 To zhishu
        iC = iC * dishu
    Next i
    
    MyPower = iC
    
End Function