[wxPython] wxGrid - obtaining the current selected column ?

i am within a wxGrid;
1 ) i want to use the SetSelectionMode to restrict Selections only on whole COLUMNS.
2 ) later i want to obtain the SELECTED COLUMN

how ?

part of my source:

#self is a wxGrid
        self.SetSelectionMode(self.wxGridSelectColumns) # don' work - why ???
        self.CreateGrid(10, 15)

def OnClick_On_Delete_Col(self, event):
     self.IsSelection() # only returns if any Selection but not which was selected :frowning:

thanks

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