[RESOLVED POORLY] Setting a PDF embedded inside a WebBrowser as the ActiveControl

[RichardG]

Hi all,

I have a Windows Form with a TabControl, one of the tabs is named Tab_Help, and it contains a WebBrowser control which navigates to a PDF file that I generate.

My goal is to have the the PDF embedded inside the WebBrowser gain focus when the user selects the Help Tab. As it stands now, users need to click the PDF to begin scrolling through it, and I'd like to make it easier by shifting focus to the PDF the moment the Help tab is selected.

I set the WebBrowser to load the PDF on Form1 load, and aside from the fact that users need to click it before they can scroll through it, the PDF itself works perfectly.

Private Sub Form1.Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
    WebBrowser1.Navigate("C:\temp\pdftest.pdf#toolbar=0") ' Works perfectly
End Sub
 
Private Sub TabControl_SelectedIndexChanged() Handles TabControl.SelectedIndexChanged
    If TabControl.SelectedIndex = TabControl.TabPages.IndexOf(Tab_Log) Then
        ActiveControl = Textbox_Log ' This works perfectly, allows scrolling immediately
    ElseIf TabControl.SelectedIndex = TabControl.TabPages.IndexOf(Tab_Help) Then
        ActiveControl = WebBrowser1 ' Doesn't work
        'WebBrowser1.Focus() ' Also doesn't work
        'WebBrowser1.Document.Focus() ' Also doesn't work
    End If
End Sub

Any suggestions?