Function 12 - begin/end window redraw.
Subfunction 1 - begin window redraw.
Parameters:
- eax = 12 - function number
- ebx = 1 - subfunction number
Returned value:
- function does not return value
Subfunction 2 - end window redraw.
Parameters:
- eax = 12 - function number
- ebx = 2 - subfunction number
Returned value:
- function does not return value
Remarks:
- Subfunction 1 deletes all buttons defined with
function 8, they must be defined again.