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type TDBGrid = class(DBGrids.TDBGrid) protected procedure Paint; override; end; 阅读全文
摘要：
MSDN关于WM_MOUSEMOVE的说明：TheWM_MOUSEMOVEmessageispostedtoawindowwhenthecursormoves.Ifthemouseisnotcaptured,themessageispostedtothewindowthatcontainsthecursor.Otherwise,themessageispostedtothewindowthathascapturedthemouse.也就是说，你在比如ControlY单击鼠标后，系统就SetCapture，鼠标就被当前的WindowCapture了(即ControlY)，当你放开鼠标时才Rele 阅读全文