VB6 does not terminate Excel process - excel

Question

I'm having an VB6 application that opens an excel macro enabled file using workbooks.open method. Inside this file, there is an userform that gonna be automatically opened when the file is opened. The problem is the workbooks.open method in vb6 application keeps running and does not jump to next line even when I close my userform (I do have codes to close workbook, quit excel app when the userform is closed). I can only close the interface of my userform but Excel still running in background. As long as I dont close the Excel app in task manager, my vb6 does not terminate excel process and of course it will not jump to next line either.
Here is my code in vb6 to open excel file that contains the userform above
As I said, workbooks.open method works but it does not terminate and keeps the excel app runnning in background
P/s: don't mind the Japanese characters
Private Sub Form_Load()
Dim xlapp
Dim xlwkb
If Not App.PrevInstance Then
Set xlapp = CreateObject("excel.application")
Me.Hide
On Error Resume Next
Set xlwkb = xlapp.workbooks.open("C:\Users\david\Desktop\sale-system\fixedfile.xlsm", Readonly:= True)
Set xlwkb = Nothing
If Not xlapp Is Nothing Then
xlapp.Visible = True
xlapp.Application.quit
Set xlapp = Nothing
End If
Unload Me
Else
MsgBox "プログラムが既に起動されています！", vbInformation, "売上管理システム"
Unload Me
End If
End Sub
Here is my code in excel file when close the userform
Application.DisplayAlerts = False
ThisWorkbook.Close False
Application.Visible = True
Application.Quit
End
I really need to solve this problem in this week, any solution?
Thank you guys in advance and please pardon for my english
Here is some images. I hope they will help you guys to understand my problem
This happens when I use Thisworkbook.close False statement:
This happens when I dont use Thisworkbook.close False statement:

Answer 1

Inside this file, there is an userform that gonna be automatically opened when the file is opened.
when I close my userform (I do have codes to close workbook, quit excel app when the userform is closed).
You are doing this incorrectly. Do not close/quit it from the UserForm. Do it from VB6 form. This way, vb6 will be able to handle and clear the objects.
Here, try this (I already tried it and it works...). This will not leave an instance of Excel running. I have commented the code. But if you still have questions then simply ask.
Note: Before you try this (Just for testing purpose), close all Excel application. Even from the task manager.
Private Sub Form_Load()
Dim oXLApp As Object
Dim oXLWb As Object
Dim ICreateatedExcel As Boolean
'~~> Establish an EXCEL application object
On Error Resume Next
Set oXLApp = GetObject(, "Excel.Application")
'~~> If not found then create new instance
If Err.Number <> 0 Then
Set oXLApp = CreateObject("Excel.Application")
'~~> I created instance of Excel
ICreateatedExcel = True
End If
Err.Clear
On Error GoTo 0
'~~> Check if you have an instance of Excel
If oXLApp Is Nothing Then
MsgBox "Unable to get an instance of Excel.", vbCritical, "Excel is Installed?"
Exit Sub
End If
Me.Hide
'~~> Show Excel
oXLApp.Visible = True
'~~> Open file
Set oXLWb = oXLApp.Workbooks.Open("C:\Tester.xlsm")
'~~> This and other lines below will not run till the
'~~> time you close the userform in Excel
'~~> Close the workbook
oXLWb.Close (False) '<~~ Set this to True if you want to save changes
Set oXLWb = Nothing
'~~> If I created Excel then quit
If ICreateatedExcel = True Then oXLApp.Quit
Set oXLApp = Nothing
Unload Me
End Sub