For modifying the icon, I am not sure how you can do it in C, but I do know of a way to do it in TI-BASIC using the Celtic (monochome) libs.


"AA55AA55AA55AA55 //checker icon
det(21,Str1,0,42 //put " in Str1
Input "ICON:",A
If A
  det(8,"ICON",Str1+"FF818181818181FF",2 //put box icon on line 2 of this file
  det(8,"ICON",Str1+"AA55AA55AA55AA55",2 //put checker icon on line 2

If you can find a way to get the address of the start of your file, it shouldn't be too bad to write over the icon data.
This is in C. I guess I'll need to open the variable, get to the icon field, and over write the data with the new icon. Though the program is compressed. Not sure if that includes the icon.
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