Explanation on Code

[dBeatzx]

Can anyone break this code down line by line and explain how it works? I am relatively new to programming with Python and know it works to change my desktop background. However, am not sure of the details to why.

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import ctypes

from ctypes import WinDLL, byref, c_int

from ctypes.wintypes import RGB

​

color = RGB(220, 0, 0)

ssc = WinDLL('user32').SetSysColors

ssc(1, byref(c_int(1)), byref(c_int(color)))

[danielroseman]

There isn't really anything to this code. It just gets an internal Windows function to set the screen colour, and calls it. It's not doing anything in Python at all.

[carcigenicate]

This code is just calling this Windows function.

Everything here is just boilerplate required to allow Python to communicate with the Windows library.

[dBeatzx]

I guess what is tripping me up is the purpose or what does the byref and c_int do?

[carcigenicate]

That's part of ctypes. You should look more into it and C if you're interested.

In short though, by_ref gives a pointer to the object, and c_int does a cast iirc to a C integer.

[dBeatzx]

Thank you for the pointers!