if(e.KeySate==8) 就是
Value Key
1 (bit 0) The left mouse button.
2 (bit 1) The right mouse button.
4 (bit 2) The SHIFT key.
8 (bit 3) The CTRL key.
16 (bit 4) The middle mouse button.
32 (bit 5……
if ((ModifierKeys & Keys.Shift) == Keys.Shift)
{
MessageBox.Show("Pressed " + Keys.Shift);
}