网页主页https://XXXX.
内嵌框架网页https://XXXX.(此网页单独登录提示失败，需点击主页右上角“登录”来登录账号)
问题描述：VB6.0在网页弹窗登录界面自动填表失败，代码如下。
Private Sub Command1_Click()
Randomize
On Error Resume Next
Dim a As Variant
Dim Vdoc As MSHTML.HTMLDocument
Set Vdoc = WebBrowser1.document
   For Each a In Vdoc.getElementsByTagName("input")
        Select Case a.Name
            Case "username"
                a.Value = "13888888888"
            Case "password"
                a.Value =  "123456"
            Case "vertifyCode"
                a.Value = "1234"
        End Select
   Next
WebBrowser1.document.getElementById("LoginBtn").Click
这个问题源于弹窗中的登录表单是在iframe中，而WebBrowser控件默认只能访问主框架的document，求助大佬解决：实现获取到iframe的document，完成自动填表？

[此贴子已经被作者于2023-3-22 22:11编辑过]

统一回复，此代码已解决登录问题。
Private Sub Command1_Click()
Dim Vdoc As mshtml.HTMLDocument
Set Vdoc = WebBrowser1.document
Vdoc.frames(1).document.All("username").Value = Text1.Text
Vdoc.frames(1).document.All("password").Value = Text2.Text
Vdoc.frames(1).document.All("vertifyCode").Value = Text3.Text
Vdoc.frames(1).document.getElementById("LoginBtn").Click
End Sub