请教VBA相关问题

平常人欢欢

Public Sub kkkk()
Dim F As Integer
F = ThisWorkbook.Path & " \员工花名册.xlsx"
If Len(Dir(F)) > 0 Then
MsgBox "文件已存在"
End If
MsgBox "文件不存在"
End Sub
各位大神，标注红字的这行有问题不能运行，请问这行是怎么了？为什么不能运行？

astupig

Dim F As Integer 应该改为Dim F as String.