限制VB文本框输入的代码

1.只能输入数字和Backspace键

Private Sub txtSID_KeyPress(KeyAscii As Integer)
If KeyAscii = 8 Then
ElseIf KeyAscii < Asc(“0”) Or KeyAscii > Asc(“9”) Then
KeyAscii = 0
End If
End Sub

2. 只能输入大小写英文字母和汉字（包括退格和回车）

Private Sub txtName_KeyPress(KeyAscii As Integer)
If KeyAscii < 0 Or KeyAscii = 8 Or KeyAscii = 13 Then
ElseIf Not Chr(KeyAscii) Like “[a-zA-Z]” Then
KeyAscii = 0
End If
End Sub

3. 只能输入汉字

Private Sub txtDirector_KeyPress(KeyAscii As Integer)
If KeyAscii < 0 Or KeyAscii = 8 Then Exit Sub
KeyAscii = 0 ‘不能输入
End Sub

4.限制字符输入

Private Sub txtUserName_KeyPress(KeyAscii As Integer) Select Case KeyAscii Case 8 Case Asc(“A”) To Asc(“Z”) Case Asc(“0”) To Asc(“9”) Case Asc(“a”) To Asc(“z”) Case Is < 0 Case Else KeyAscii = 0 End Select End Sub