Private Sub Comand1_Click ()
D.im count ( 25 ) As Integer, ch As String
ch=U c ase ( InputBox ( " 请输入字母字符串 " ) )
F.or k=1 To Len ( ch )
n=Asc ( Mid ( ch,k,1 ) ) -Asc ( " A " )
If n>=0 Then
C.ount ( n ) =Count ( n ) + 1
E.nd If
Next k
m=count ( 0 )
F.or k=1 To 25
If m<count ( k ) Then
m=count ( k )
E.nd If
Next k
Print m
E.nd Sub
A. ) 0
B. ) 1
C. ) 2
D. ) 3