要求当鼠标在图片框P1中移动时，立即在图片框中显示鼠标的位置坐标。下面能正确实现上述功能的事件过程是 A)Private Sub P1_MouseMove(Button As Integer，Shift As Integer，X As Single，Y As Single) Print X，Y End Sub B)Private Sub P1_MouseDown(Button As Integer，Shift As Integer，X As Single，Y As Single) Picture.Print X，Y End Sub C)Private Sub P1_MouseMove(Button As Integer，Shift As Integer，X As Single，Y As Single) P1.Print X，Y End Sub D)Private Sub Form_MouseMove(Button As Integer，Shift As Integer，x As Single，Y As Single) P1.Print X，Y End Sub