这用vc应该是很容易实现的!
移植到c#中,也不过是多次调用api而已了!
[DllImport("user32.dll", EntryPoint="SendMessage")]
public static extern int SendMessage( int hWnd, int Msg, int wParam, int lParam);
我来也
Private Sub TextBox1_Enter(ByVal sender As Object, ByVal e As System.EventArgs) Handles TextBox1.Enter
TextBox1.SelectionStart = 0
TextBox1.SelectionLength = TextBox1.Text.Length
End Sub