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Function 1 - put a dot in the window

Characteristic:

* eax = 1 - the number of function

* ebx = x-coordinate (relative to the window)

* ecx = y-coordinate (relative to the window)

* edx = 0x00RRGGBB - color of a point

* edx = 0x01xxxxxx - to invert the color of the point (the lower 24 bits are ignored)

Returned value:

* function does not return a value

Constants for registers:

eax - SF_PUT_PIXEL (1)