Hot Key:

Left_Button_Mouse 		- Set black cell
Right_Button_Mouse 		- Set white cell
CTRL+Left_Button_Mouse 		- Set cross cell
Shift+Left_Button_Mouse 	- Set black cells selected frame
Shift+Right_Button_Mouse 	- Set white cells selected frame
Shift+CTRL+Left_Button_Mouse 	- Set cross cells selected frame
ESC (hold down)			- Stop solving