void gdk_window_begin_move_drag ( GdkWindow* window, gint button, gint root_x, gint root_y, guint32 timestamp )
Begins a window move operation (for a toplevel window).
This function assumes that the drag is controlled by the
client pointer device, use
to begin a drag with a different device.
The button being used to drag, or 0 for a keyboard-initiated drag.
Root window X coordinate of mouse click that began the drag.
Root window Y coordinate of mouse click that began the drag.
Timestamp of mouse click that began the drag.