Hide only specific workbook without affecting other workbook

Already circled the internet and has the same answer that did not work as I wanted to be.

Q: How to hide workbook and show userform without hiding other workbook?

This code is good but hides other workbooks.

Application.Visible = False

This code is bad as it still shows the excel application.

Workbooks("Workbook Name.xlsm").Window(1).Visible = False

Also dont work.

ActiveWorkbook.Visible = False

Lastly, the tool method, going to tools>options>general tab>ignore other application. I dont have this option on my VBA

This is the code I used.

Private Sub UserForm_Initialize()
If Application.Windows.Count > 1 Then
Application.Windows(ThisWorkbook.Name).Visible = False
Else
Application.Visible = False
End If

and in ThisWorkbook module

Private Sub Workbook_Open()
UserForm1.Show
End Sub