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What does the paramcheck attribute of TADODataSet mean? How can this problem be used ??

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What does the paramcheck attribute of TADODataSet mean? How can this problem be used ?? Development and Application of VCL Components
Http://www.delphi2007.net/DelphiVCL/html/delphi_20061221121644221.html
Example:
Write the adoquery statement in access + Delphi7.0. Sometimes you need to set its paramcheck attribute to false to pass the statement. I don't know why, but I don't understand the help of Delphi, thank you !!!!!
When will this attribute be used ???????

Checks whether parameters exist in SQL statements!

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