Gets which mouse button is pressed.
HRESULT value = object.get_which(USHORT* p);
Type: unsigned short
No button is pressed.
The left mouse button is pressed.
The right mouse button is pressed.
There are no standards that apply here.
The IDOMMouseEvent::which property is provided for compatibility only. The IDOMMouseEvent::button property is preferred.
Note The values that are returned by this property are the same as those returned by IDOMMouseEvent::button plus one.