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when using a dllcall to getDC, do you have to release/kill the DC after you are done with it ?

Depends.

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im not sure what that means

this is the code I am using, my concern is that since its an infinite loop it will eventually start hogging up too much memory if I dont release it and have to.

loop
{
winget, tableid, id, blah
hDC := dllcall("GetDC", "Uint", id)
pixel := dllcall("GetPixel", "Uint", 30, "Uint", 30)
tooltip pixel
}

1) That loop NEVER exits.... how come...
2) The handle for the DC shouldn't change. I'm not knowlegable about DC, but I know other handle values don't, so I presume this is the case here. So, you should only have to call getDC once, before the loop.
3) You will need to call ReleaseDC before the code exits. You can do this by using OnExit and putting the function call in the subroutine.
4) All getDC does is return a handle, it doesn't create anything - there is no memory allocated, thus it can't become a memory hog.

Also, why don't you use PixelGetColor instead??

_________________
As always, if you have any further questions, don't hesitate to ask.

Add OOP to your scripts via the Class Library. Check out my scripts.