Function 1 - put pixel in the window.
Parameters:
- eax = 1 - function number
- ebx = x-coordinate (relative to the window)
- ecx = y-coordinate (relative to the window)
- edx = 0x00RRGGBB - color of a pixel
edx = 0x01xxxxxx - invert color of a pixel
(low 24 bits are ignored)
Returned value:
- function does not return value