this.KeyPreview = true;...private void Form1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) { if (e.KeyCode == Keys.F1) { // Display a pop-up Help topic to assist the user. MessageBox.Show(
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 Meaning ssShift The Shift key is held
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 Meaning ssShift The Shif