设有如下通用过程:Public Function Fun(xStr As String)As StringDim tStr As String,strL As IntegerstrL=Len(xStr)Do While i
单选题
设有如下通用过程:Public Function Fun(xStr As String)As StringDim tStr As String,strL As IntegerstrL=Len(xStr)Do While i<=strL/2tStr=tStr&Mid(xStr,i,1)&Mid(xStr,strL-i+1,1)i=i+1Loop在窗体上画一个名称为Text1的文本框和一个名称为Com