这是我在 vb6 中编写的代码......它在 text1.setfocus 中显示错误
Private Sub Text1_Lostfocus()
s1 = Text1.Text
flag = 0
If Text1.Text = "" Then
flag = 1
End If
For i = 1 To Len(s1)
l = Mid(s1, i, 1)
If IsNumeric(l) = True Then
flag = 1
Exit For
End If
Next i
If flag = 1 Then
MsgBox "Enter valid input"
Text1.ForeColor = vbRed
Text1.SetFocus
End If
End Sub