Read Alt-F1 in DGV double-click?

[nbrege]

I want to have a feature in my program where if I hold Alt-F1 down while double-clicking on a DataGridView cell, it goes & does something. I tried This:

 Private Sub ProcessDataGridView_CellDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles ProcessDataGridView.CellDoubleClick

        If Control.ModifierKeys = (Keys.Alt Or Keys.F1) Then
            'do something here 
        End If

    End Sub

If I use just Keys.Alt alone it works when I hold the Alt key & double-click, but I want ALt-F1. Can anyone help me out? Thanks...