Detect a worksheet is present in a workbook

Hello,

I have written a few macro for my Excel template.
But I want it to run only if the active workbook has sheet named "Table".
May I know how to write the code properly?

I know this sentence is wrong, please help me to correct it.
If Activeworkbook.Sheets("Table"). Is Nothing Then

Sub Action()

If Activeworkbook.Sheets("Table"). Is Nothing Then 
MsgBox("Please select the proper workbook.")
Else
Call Macro1
End If

End Sub