在窗体上画一个命令按钮和一个文本框,然后编写命令按钮的Click事件过程。程序运行后,在文
Private Sub Command1_Click()
Dim str As String, s As String, c As String
str = UCase(Text1)
s = ""
c = "Z"
While c >= "A"
If InStr(str, c) = 0 Then
s = 【7】
End If
c = Chr$(Asc(c) 【8】 )
Wend
If s <> "" Then
Text1 = s
End If
End Sub