Specifies mouse notification codes for Thumbnail GUI window.

Values:

IG_GUI_MOUSE_LDOWN	Mouse event is left button down.
IG_GUI_MOUSE_LUP	Mouse event is left button up.
IG_GUI_MOUSE_LDBL	Mouse event is left button double click.
IG_GUI_MOUSE_RDOWN	Mouse event is right button down.
IG_GUI_MOUSE_RUP	Mouse event is right button up.
IG_GUI_MOUSE_RDBL	Mouse event is right button double click.

Remarks:

This enumeration is used by LPFNIG_GUITHUMBMOUSE callbacks function.