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Question about dynamically generated check box and data update?

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Question about dynamically generated check box and data update? Delphi/Windows SDK/API
Http://www.delphi2007.net/DelphiDB/html/delphi_20061221122525189.html
Question 1: I want the leftmost column of DBGrid, that is, the check box for dynamically generating a column next to the ID. When you click the check box, the corresponding record is selected. You can delete this record, modification and other operations?
Question 2: In DBGrid, I use label1.caption: = inttostr (adoquery1.recordcount); (put in formcreat) to get the total number of records in the grid. But when I Insert a new row, but it is not updated in real time. How can this problem be solved? Should it be included in other response events?
Please help !!!

In the query afteropen event

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