摘要:
Shift 是一个集合变量。type TShiftState = set of (ssShift, ssAlt, ssCtrl, ssLeft, ssRight,ssMiddle, ssDouble);也就是说TShiftstate类型有ssShift, ssAlt, ssCtrl, ssLeft(鼠标左键),ssRight(鼠标右键), ssMiddle(鼠标中键), ssDouble (鼠标双击)Value MeaningssShiftThe Shift key is held down.ssAltThe Alt key is held down.ssCtrlThe Ctrl key is 阅读全文