How do I make MSwindows-like little rightClick menus?

I am trying to make a little application which looks like a spreadsheet as
far as user input is concerned. That is to say, a user of Excel should be at
home using it. I am using a wx.Grid for the data.
    In Excel, when the user wishes to add a row to the spreadsheet, he
right-clicks on the label at the left end of the row in question. A little
menu pops up, and the user can pick insert, delete, or many other things.
   I cannot find a wigit to call from OnLabelRightClick to do the mini-menu.
Did I miss something, or does it not exist?

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Vernon